P574 SAP House 2

Summary

AI generated summary

Design-stage SAP 2012 assessment and Building Regulations Part L1A compliance report for a new 101.32 m² semi-detached house in South England (House 2), assessed 17 June 2019. The dwelling meets targets for carbon emissions and fabric efficiency: DER 16.66 kgCO2/m² versus TER 17.43, and DFEE 46.7 kWh/m² versus TFEE 53.5. Fabric performance is within limits (walls 0.20, floor 0.12, roof 0.11 W/m²K; openings average 1.46), with thermal bridging calculated and design air permeability 5.0 m³/h/m² at 50 Pa. Main heating is a mains-gas Ideal Logic System boiler (about 89.8% efficiency) with a wood-burning secondary heater; hot water uses a 210 L cylinder with specified heat loss and insulated pipework. Controls and low-energy lighting (100%) comply. Natural ventilation is used, and overheating risk is assessed as not significant. Predicted SAP energy rating is about 84, with environmental impact rating about 86.

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Regulations Compliance Report

Approved Document L1A, 2013 Edition, England assessed by Stroma FSAP 2012 program, Version: 1.0.4.18

Printed on 17 June 2019 at 14:44:10

Project Information:

Assessed By:	Demi Beneke (STRO027754)	Building Type:	Semi-detached House

Dwelling Details:

Stage:	NEW DWELLING DESIGN STAGE	Total Floor Area:	101.32m²
Site Reference:	Park Lodge 5865	Plot Reference:	House 2
Address:	House 2

Client Details:

Name:
Address:

This report covers items included within the SAP calculations.
It is not a complete report of regulations compliance.

1a TER and DER

Fuel for main heating system: Mains gas

Fuel factor: 1.00 (mains gas)

Metric	Value	Status
Target Carbon Dioxide Emission Rate (TER)	17.43 kg/m²
Dwelling Carbon Dioxide Emission Rate (DER)	16.66 kg/m²	OK

1b TFEE and DFEE

Metric	Value	Status
Target Fabric Energy Efficiency (TFEE)	53.5 kWh/m²
Dwelling Fabric Energy Efficiency (DFEE)	46.7 kWh/m²	OK

2 Fabric U-values

Element	Average	Highest	Status
External wall	0.20 (max. 0.30)	0.20 (max. 0.70)	OK
Party wall	0.00 (max. 0.20)	-	OK
Floor	0.12 (max. 0.25)	0.12 (max. 0.70)	OK
Roof	0.11 (max. 0.20)	0.11 (max. 0.35)	OK
Openings	1.46 (max. 2.00)	1.80 (max. 3.30)	OK

2a Thermal bridging

Thermal bridging calculated from linear thermal transmittances for each junction

3 Air permeability

Item	Value	Requirement	Status
Air permeability at 50 pascals	5.00 (design value)	Maximum 10.0	OK

4 Heating efficiency

Main Heating system: Database: (rev 443, product index 018050):

Boiler systems with radiators or underfloor heating - mains gas

Brand name: Ideal

Model: LOGIC SYSTEM

Model qualifier: s24IE (Regular)

System	Efficiency	Standard	Minimum	Status
Main heating (SEDBUK2009)	89.8 %	SEDBUK2009	88.0 %	OK

Secondary heating system: Room heaters - wood

Closed room heater

System	Efficiency	Minimum	Status
Secondary heating	65.0 %	65.0 %	OK

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

Regulations Compliance Report

5 Cylinder insulation

Item	Value	Limit	Status
Hot water Storage: Measured cylinder loss	2.30 kWh/day	Permitted by DBSCG: 2.30 kWh/day	OK
Primary pipework insulated	Yes		OK

6 Controls

Space heating controls TTZC by plumbing and electrical services OK
Hot water controls: Cylinderstat OK
Independent timer for DHW OK
Boiler interlock: Yes OK

7 Low energy lights

Item	Value	Minimum	Status
Percentage of fixed lights with low-energy fittings	100.0%	75.0%	OK

8 Mechanical ventilation

Not applicable

9 Summertime temperature

Item	Result	Status
Overheating risk (South England)	Not significant	OK

Based on:

Overshading: Average or unknown
Windows facing: North East 1.3m²
Windows facing: North West 0.72m²
Windows facing: North West 0.72m²
Windows facing: South West 1.07m²
Windows facing: North East 0.84m²
Windows facing: North East 1.3m²
Windows facing: North West 1.3m²
Windows facing: South West 1.3m²
Windows facing: South West 1.3m²
Ventilation rate: 4.00
Blinds/curtains: None

10 Key features

Roofs U-value 0.11 W/m²K
Party Walls U-value 0 W/m²K
Floors U-value 0.12 W/m²K
Secondary heating (wood logs)
Secondary heating fuel wood logs

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

Predicted Energy Assessment

House 2 Dwelling type: Semi-detached House

Date of assessment: 17 June 2019

Produced by: Demi Beneke

Total floor area: 101.32 m²

This is a Predicted Energy Assessment for a property which is not yet complete. It includes a predicted energy rating which might not represent the final energy rating of the property on completion. Once the property is completed, an Energy Performance Certificate is required providing information about the energy performance of the completed property.

Energy performance has been assessed using the SAP 2012 methodology and is rated in terms of the energy use per square metre of floor area, energy efficiency based on fuel costs and environmental impact based on carbon dioxide (CO2) emissions.

Energy Efficiency Rating Environmental Impact (CO ) Rating 2

Energy Efficiency Rating

The energy efficiency rating is a measure of the overall efficiency of a home. The higher the rating the more energy efficient the home is and the lower the fuel bills are likely to be.

Environmental Impact (CO2) Rating

The environmental impact rating is a measure of a home’s impact on the environment in terms of carbon dioxide (CO2) emissions. The higher the rating the less impact it has on the environment.

SAP Input

Property Details

Property Details:	House 2
Address:	House 2
Located in:	England
Region:	South England
UPRN:
Date of assessment:	17 June 2019
Date of certificate:	17 June 2019
Assessment type:	New dwelling design stage
Transaction type:	New dwelling
Tenure type:	Unknown
Related party disclosure:	No related party
Thermal Mass Parameter:	Indicative Value Medium
Water use <= 125 litres/person/day:	True
PCDF Version:	443

Property description

Dwelling type:	House
Detachment:	Semi-detached
Year Completed:	2019

Floor Location

Floor	Floor area	Storey height
Floor 0	50.66 m²	2.38 m
Floor 1	50.66 m²	2.68 m

Living area: 14.87 m² (fraction 0.147)

Front of dwelling faces: North East

Opening types

Name	Source	Type	Glazing	Argon	Frame
D1	Manufacturer	Solid			Wood
W5	Manufacturer	Half glazed	low-E, En = 0.05, soft coat	Yes	Wood
W1	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W2	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W3	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W4	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W6	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W7	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W8	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W9	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood
W10	Manufacturer	Windows	low-E, En = 0.05, soft coat	Yes	Wood

Name	Gap	Frame Factor	g-value	U-value	Area	No. of Openings
D1	mm	0.7	0	1.8	2.15	1
W5	16mm or more mm	0.7	0.71	1.4	3.13	1
W1	16mm or more	0.7	0.71	1.4	1.3	1
W2	16mm or more	0.7	0.71	1.4	0.72	1
W3	16mm or more	0.7	0.71	1.4	0.72	1
W4	16mm or more	0.7	0.71	1.4	1.07	1
W6	16mm or more	0.7	0.71	1.4	0.84	1
W7	16mm or more	0.7	0.71	1.4	1.3	1
W8	16mm or more	0.7	0.71	1.4	1.3	1
W9	16mm or more	0.7	0.71	1.4	1.3	1
W10	16mm or more	0.7	0.71	1.4	1.3	1

Name	Location	Orient	Width	Height
D1	External Walls	North East	1.023	2.1
W5	External Walls	South West	1.494	2.093
W1	External Walls	North East	1.022	1.275
W2	External Walls	North West	0.685	1.05
W3	External Walls	North West	0.685	1.05
W4	External Walls	South West	1.022	1.05
W6	External Walls	North East	0.797	1.05
W7	External Walls	North East	1.022	1.275
W8	External Walls	North West	1.022	1.275
W9	External Walls	South West	1.022	1.275
W10	External Walls	South West	1.022	1.275

Overshading: Average or unknown

Opaque Elements

Type	Gross area	Openings	Net area	U-value	Ru value	Curtain wall	Kappa
External Elements
External Walls	104.03	15.13	88.9	0.2	0	False	N/A
Plain Ceiling	50.66	0	50.66	0.11	0		N/A
Ground Floor	50.66			0.12			N/A
Internal Elements
Party Elements
Party Walls	46.15	N/A

Thermal bridges

Thermal bridges: User-defined (individual PSI-values) Y-Value = 0.0481

Length	Psi-value	Code / Description
10.816	0.059	E2 Other lintels (including other steel lintels)
[Approved] 8.299	0.04	E3 Sill
[Approved] 29.536	0.05	E4 Jamb
20.56	0.05	E5 Ground floor (normal)
20.56	0	E6 Intermediate floor within a dwelling
[Approved] 14.81	0.06	E10 Eaves (insulation at ceiling level)
5.75	0.048	E12 Gable (insulation at ceiling level)
15.18	0.04	E16 Corner (normal)
5.06	-0.052	E17 Corner (inverted internal area greater than external area)
[Approved] 10.12	0.06	E18 Party wall between dwellings
9.12	0.16	P1 Ground floor
9.12	0.07	P6 Ground floor (inverted)
9.12	0.24	P4 Roof (insulation at ceiling level)

Ventilation

Pressure test:	Yes (As designed)
Ventilation:	Natural ventilation (extract fans)
Number of chimneys:	0
Number of open flues:	0
Number of fans:	3
Number of passive stacks:	0
Number of sides sheltered:	2
Pressure test:	5

Main heating system

Main heating system: Boiler systems with radiators or underfloor heating

Gas boilers and oil boilers

Fuel: mains gas

Info Source: Boiler Database

Database: (rev 443, product index 018050) Efficiency: Winter 80.1 % Summer: 90.8

Brand name: Ideal

Model: LOGIC SYSTEM

Model qualifier: s24IE (Regular boiler)

Systems with radiators

Main heating Control

Central heating pump : 2013 or later

Design flow temperature: Unknown

Boiler interlock: Yes

Weather Compensator

Main heating Control: Time and temperature zone control by suitable arrangement of plumbing and electrical services

Control code: 2110

Secondary heating system

Secondary heating system: Room heaters

Solid fuel room heaters

Fuel :wood logs

Info Source: SAP Tables

Closed room heater

HETAS Approved

Water heating

Water heating: From main heating system

Water code: 901

Fuel :mains gas

Hot water cylinder

Cylinder volume: 210 litres

Cylinder insulation: Measured loss, 2.3kWh/day

Primary pipework insulation: True

Cylinderstat: True

Cylinder in heated space: True

Solar panel: False

Others

Electricity tariff:	Standard Tariff
In Smoke Control Area:	Unknown
Conservatory:	No conservatory
Low energy lights:	100%
Terrain type:	Low rise urban / suburban
EPC language:	English
Wind turbine:	No
Photovoltaics:	None
Assess Zero Carbon Home:	No

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

SAP WorkSheet: New dwelling design stage

User Details

Assessor Name:	Demi Beneke	Stroma Number:	STRO027754
Software Name:	Stroma FSAP 2012	Software Version:	Version: 1.0.4.18
Property Address:	House 2
Address:	House 2

1. Overall dwelling dimensions

Area(m²)	Av. Height(m)	Volume(m³)
Ground floor 50.66 (1a)	x 2.38 (2a)	= 120.57 (3a)
First floor 50.66 (1b)	x 2.68 (2b)	= 135.77 (3b)
Total floor area TFA = (1a)+(1b)+(1c)+(1d)+(1e)+.....(1n) 101.32 (4)
Dwelling volume (3a)+(3b)+(3c)+(3d)+(3e)+.....(3n) = 256.34 (5)

2. Ventilation rate

main secondary other total m³ per hour heating heating

Number of chimneys 0 + 0 + 0 = 0 x 40 = 0 (6a)

Number of open flues 0 + 0 + 0 = 0 x 20 = 0 (6b)

Number of intermittent fans 3 x 10 = 30 (7a)

Number of passive vents 0 x 10 = 0 (7b)

Number of flueless gas fires 0 x 40 = 0 (7c)

Infiltration due to chimneys, flues and fans = (6a)+(6b)+(7a)+(7b)+(7c) = 30 ÷ (5) = 0.12 (8)

If a pressurisation test has been carried out or is intended, proceed to (17), otherwise continue from (9) to (16)

Number of storeys in the dwelling (ns) 0 (9)

Additional infiltration [(9)-1]x0.1 = 0 (10)

Structural infiltration: 0.25 for steel or timber frame or 0.35 for masonry construction 0 (11)

if both types of wall are present, use the value corresponding to the greater wall area (after deducting areas of openings); if equal user 0.35

If suspended wooden floor, enter 0.2 (unsealed) or 0.1 (sealed), else enter 0 0 (12)

If no draught lobby, enter 0.05, else enter 0 0 (13)

Percentage of windows and doors draught stripped 0 (14)

Window infiltration 0.25 - [0.2 x (14) ÷ 100] = 0 (15)

Infiltration rate (8) + (10) + (11) + (12) + (13) + (15) = 0 (16)

Air permeability value, q50, expressed in cubic metres per hour per square metre of envelope area 5 (17)

If based on air permeability value, then (18) = [(17) ÷ 20]+(8), otherwise (18) = (16) 0.37 (18)

Air permeability value applies if a pressurisation test has been done or a degree air permeability is being used

Number of sides sheltered 2 (19)

Shelter factor (20) = 1 - [0.075 x (19)] = 0.85 (20)

Infiltration rate incorporating shelter factor (21) = (18) x (20) = 0.31 (21)

Infiltration rate modified for monthly wind speed

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monthly average wind speed from Table 7 (22)m= 5.1 5 4.9 4.4 4.3 3.8 3.8 3.7 4 4.3 4.5 4.7

Wind Factor (22a)m = (22)m ÷ 4

(22a)m= 1.27 1.25 1.23 1.1 1.08 0.95 0.95 0.92 1 1.08 1.12 1.18

Adjusted infiltration rate (allowing for shelter and wind speed) = (21a) x (22a)m

0.4 0.39 0.38 0.34 0.34 0.3 0.3 0.29 0.31 0.34 0.35 0.37

Calculate effective air change rate for the applicable case

If mechanical ventilation: 0 (23a)

If exhaust air heat pump using Appendix N, (23b) = (23a) × Fmv (equation (N5)) , otherwise (23b) = (23a) 0 (23b)

If balanced with heat recovery: efficiency in % allowing for in-use factor (from Table 4h) = 0 (23c)

a) If balanced mechanical ventilation with heat recovery (MVHR) (24a)m = (22b)m + (23b) × [1 – (23c) ÷ 100]

(24a)m= 0 0 0 0 0 0 0 0 0 0 0 0 (24a)

b) If balanced mechanical ventilation without heat recovery (MV) (24b)m = (22b)m + (23b)

(24b)m= 0 0 0 0 0 0 0 0 0 0 0 0 (24b)

c) If whole house extract ventilation or positive input ventilation from outside

if (22b)m < 0.5 × (23b), then (24c) = (23b); otherwise (24c) = (22b) m + 0.5 × (23b)

(24c)m= 0 0 0 0 0 0 0 0 0 0 0 0 (24c)

d) If natural ventilation or whole house positive input ventilation from loft

if (22b)m = 1, then (24d)m = (22b)m otherwise (24d)m = 0.5 + [(22b)m² x 0.5]

(24d)m= 0.58 0.58 0.57 0.56 0.56 0.54 0.54 0.54 0.55 0.56 0.56 0.57 (24d)

Effective air change rate - enter (24a) or (24b) or (24c) or (24d) in box (25)

(25)m= 0.58 0.58 0.57 0.56 0.56 0.54 0.54 0.54 0.55 0.56 0.56 0.57 (25)

3. Heat losses and heat loss parameter

Element	Details	Result
Doors Type 1	2.15 x 1.8	= 3.87 (26)
Doors Type 2	3.13 x 1.4	= 4.382 (26)
Windows Type 1	1.3 x1/[1/( 1.4 )+ 0.04]	= 1.72 (27)
Windows Type 2	0.72 x1/[1/( 1.4 )+ 0.04]	= 0.95 (27)
Windows Type 3	0.72 x1/[1/( 1.4 )+ 0.04]	= 0.95 (27)
Windows Type 4	1.07 x1/[1/( 1.4 )+ 0.04]	= 1.42 (27)
Windows Type 5	0.84 x1/[1/( 1.4 )+ 0.04]	= 1.11 (27)
Windows Type 6	1.3 x1/[1/( 1.4 )+ 0.04]	= 1.72 (27)
Windows Type 7	1.3 x1/[1/( 1.4 )+ 0.04]	= 1.72 (27)
Windows Type 8	1.3 x1/[1/( 1.4 )+ 0.04]	= 1.72 (27)
Windows Type 9	1.3 x1/[1/( 1.4 )+ 0.04]	= 1.72 (27)
Floor	50.66 x 0.12	= 6.0792 (28)
Walls	104.03 15.13 88.9 x 0.2	= 17.78 (29)
Roof	50.66 0 50.66 x 0.11	= 5.57 (30)
Total area of elements, m²		205.35 (31)
Party wall	46.15 x 0	= 0 (32)

* for windows and roof windows, use effective window U-value calculated using formula 1/[(1/U-value)+0.04] as given in paragraph 3.2

** include the areas on both sides of internal walls and partitions

Fabric heat loss, W/K = S (A x U) (26)…(30) + (32) = 50.74 (33)

Heat capacity Cm = S(A x k ) ((28)…(30) + (32) + (32a)…(32e) = 14593.04 (34)

Thermal mass parameter (TMP = Cm ÷ TFA) in kJ/m²K Indicative Value: Medium 250 (35)

For design assessments where the details of the construction are not known precisely the indicative values of TMP in Table 1f can be used instead of a detailed calculation.

Thermal bridges : S (L x Y) calculated using Appendix K 9.88 (36)

if details of thermal bridging are not known (36) = 0.05 x (31)

Total fabric heat loss (33) + (36) = 60.62 (37)

Ventilation heat loss calculated monthly (38)m = 0.33 × (25)m x (5)

(38)m= 48.99 48.73 48.47 47.28 47.05 46.01 46.01 45.82 46.41 47.05 47.51 47.98 (38)

Heat transfer coefficient, W/K (39)m = (37) + (38)m

(39)m= 109.61 109.35 109.09 107.9 107.67 106.63 106.63 106.44 107.03 107.67 108.13 108.6

Average = Sum(39) /12= 1…12 107.9 (39)

Heat loss parameter (HLP), W/m²K (40)m = (39)m ÷ (4)

(40)m= 1.08 1.08 1.08 1.06 1.06 1.05 1.05 1.05 1.06 1.06 1.07 1.07

Average = Sum(40) /12= 1…12 1.06 (40)

Number of days in month (Table 1a)

(41)m= 31 28 31 30 31 30 31 31 30 31 30 31 (41)

4. Water heating energy requirement: kWh/year

Assumed occupancy, N 2.75 (42)

Annual average hot water usage in litres per day Vd,average = (25 x N) + 36 99.55 (43)

Reduce the annual average hot water usage by 5% if the dwelling is designed to achieve a water use target of not more that 125 litres per person per day (all water use, hot and cold)

Hot water usage in litres per day for each month Vd,m = factor from Table 1c x (43)

(44)m= 109.5 105.52 101.54 97.56 93.57 89.59 89.59 93.57 97.56 101.54 105.52 109.5

Total = Sum(44) = 1…12 1194.55 (44)

Energy content of hot water used - calculated monthly = 4.190 x Vd,m x nm x DTm / 3600 kWh/month (see Tables 1b, 1c, 1d)

(45)m= 162.39 142.02 146.56 127.77 122.6 105.79 98.03 112.5 113.84 132.67 144.82 157.26

Total = Sum(45) = 1…12 1566.25 (45)

If instantaneous water heating at point of use (no hot water storage), enter 0 in boxes (46) to (61)

(46)m= 24.36 21.3 21.98 19.17 18.39 15.87 14.71 16.87 17.08 19.9 21.72 23.59 (46)

Water storage loss:

Storage volume (litres) including any solar or WWHRS storage within same vessel 210 (47)

a) If manufacturer’s declared loss factor is known (kWh/day): 2.3 (48)

Temperature factor from Table 2b 0.54 (49)

Energy lost from water storage, kWh/year (48) x (49) = 1.24 (50)

b) If manufacturer’s declared cylinder loss factor is not known:

Hot water storage loss factor from Table 2 (kWh/litre/day) 0 (51)

Volume factor from Table 2a 0 (52)

Temperature factor from Table 2b 0 (53)

Energy lost from water storage, kWh/year (47) x (51) x (52) x (53) = 0 (54)

Enter (50) or (54) in (55) 1.24 (55)

Water storage loss calculated for each month ((56)m = (55) × (41)m

(56)m= 38.5 34.78 38.5 37.26 38.5 37.26 38.5 38.5 37.26 38.5 37.26 38.5 (56)

If cylinder contains dedicated solar storage, (57)m = (56)m x [(50) – (H11)] ÷ (50), else (57)m = (56)m where (H11) is from Appendix H

(57)m= 38.5 34.78 38.5 37.26 38.5 37.26 38.5 38.5 37.26 38.5 37.26 38.5 (57)

Primary circuit loss (annual) from Table 3 0 (58)

Primary circuit loss calculated for each month (59)m = (58) ÷ 365 × (41)m (modified by factor from Table H5 if there is solar water heating and a cylinder thermostat)

(59)m= 23.26 21.01 23.26 22.51 23.26 22.51 23.26 23.26 22.51 23.26 22.51 23.26 (59)

Combi loss calculated for each month (61)m = (60) ÷ 365 × (41)m

(61)m= 0 0 0 0 0 0 0 0 0 0 0 0 (61)

Total heat required for water heating calculated for each month (62)m = 0.85 × (45)m + (46)m + (57)m + (59)m + (61)m

(62)m= 224.15 197.81 208.32 187.54 184.36 165.57 159.8 174.26 173.61 194.43 204.59 219.03 (62)

Solar DHW input calculated using Appendix G or Appendix H (negative quantity) (enter '0' if no solar contribution to water heating) (add additional lines if FGHRS and/or WWHRS applies, see Appendix G)

(63)m= 0 0 0 0 0 0 0 0 0 0 0 0 (63)

Output from water heater

(64)m= 224.15 197.81 208.32 187.54 184.36 165.57 159.8 174.26 173.61 194.43 204.59 219.03

Output from water heater (annual) 1…12 2293.47 (64)

Heat gains from water heating, kWh/month 0.25 ´ [0.85 × (45)m + (61)m] + 0.8 x [(46)m + (57)m + (59)m ]

(65)m= 103.4 91.85 98.14 90.3 90.18 82.99 82.01 86.82 85.67 93.52 95.97 101.7 (65)

include (57)m in calculation of (65)m only if cylinder is in the dwelling or hot water is from community heating

5. Internal gains (see Table 5 and 5a)

Metabolic gains (Table 5), Watts (66)m= 165.08 165.08 165.08 165.08 165.08 165.08 165.08 165.08 165.08 165.08 165.08 165.08

Lighting gains (calculated in Appendix L, equation L9 or L9a), also see Table 5 (67)m= 63.01 55.97 45.52 34.46 25.76 21.75 23.5 30.54 41 52.05 60.75 64.77

Appliances gains (calculated in Appendix L, equation L13 or L13a), also see Table 5 (68)m= 385.74 389.74 379.65 358.18 331.07 305.6 288.58 284.57 294.66 316.13 343.24 368.72

Cooking gains (calculated in Appendix L, equation L15 or L15a), also see Table 5 (69)m= 54.26 54.26 54.26 54.26 54.26 54.26 54.26 54.26 54.26 54.26 54.26 54.26

Pumps and fans gains (Table 5a) (70)m= 3 3 3 3 3 3 3 3 3 3 3 3

Losses e.g. evaporation (negative values) (Table 5) (71)m= -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06 -110.06

Water heating gains (Table 5) (72)m= 138.99 136.69 131.91 125.42 121.2 115.27 110.23 116.69 118.98 125.7 133.29 136.7

Total internal gains = (66)m + (67)m + (68)m + (69)m + (70)m + (71)m + (72)m (73)m= 700.03 694.68 669.37 630.35 590.32 554.9 534.59 544.09 566.93 606.18 649.57 682.47 (73)

6. Solar gains

Solar gains are calculated using solar flux from Table 6a and associated equations to convert to the applicable orientation.

Solar gains in watts, calculated for each month (83)m = Sum(74)m …(82)m
(83)m= 70.52 128.11 196.47 278.95 344.86 356.63 337.89 286.54 224.69 147.3 85.92 59.41 (83)

Total gains – internal and solar (84)m = (73)m + (83)m , watts
(84)m= 770.55 822.79 865.84 909.3 935.19 911.53 872.48 830.63 791.62 753.48 735.5 741.88 (84)

7. Mean internal temperature (heating season)

Temperature during heating periods in the living area from Table 9, Th1 (°C) 21 (85)

Utilisation factor for gains for living area, h1,m (see Table 9a)
(86)m= 0.99 0.99 0.98 0.95 0.87 0.7 0.53 0.58 0.81 0.96 0.99 1 (86)

Mean internal temperature in living area T1 (follow steps 3 to 7 in Table 9c)
(87)m= 20 20.11 20.31 20.59 20.82 20.96 20.99 20.99 20.91 20.62 20.27 19.98 (87)

Temperature during heating periods in rest of dwelling from Table 9, Th2 (°C)
(88)m= 20.02 20.02 20.02 20.03 20.03 20.04 20.04 20.04 20.04 20.03 20.03 20.02 (88)

Utilisation factor for gains for rest of dwelling, h2,m (see Table 9a)
(89)m= 0.99 0.99 0.97 0.93 0.82 0.62 0.42 0.46 0.74 0.94 0.98 0.99 (89)

Mean internal temperature in the rest of dwelling T2 (follow steps 3 to 7 in Table 9c)
(90)m= 18.7 18.86 19.15 19.54 19.86 20.01 20.04 20.04 19.97 19.61 19.1 18.67 (90)

fLA = Living area ÷ (4) = 0.15 (91)

Mean internal temperature (for the whole dwelling) = fLA × T1 + (1 – fLA) × T2
(92)m= 18.89 19.05 19.32 19.7 20 20.15 20.18 20.18 20.1 19.76 19.27 18.86 (92)

Apply adjustment to the mean internal temperature from Table 4e, where appropriate
(93)m= 18.89 19.05 19.32 19.7 20 20.15 20.18 20.18 20.1 19.76 19.27 18.86 (93)

8. Space heating requirement

Utilisation factor for gains, hm:
(94)m= 0.99 0.98 0.97 0.93 0.82 0.63 0.43 0.48 0.74 0.93 0.98 0.99 (94)

Useful gains, hmGm , W = (94)m x (84)m
(95)m= 762.01 808.86 838.54 842.37 769.58 570.46 378.98 397.83 589.17 702.08 720.59 735.01 (95)

Monthly average external temperature from Table 8
(96)m= 4.3 4.9 6.5 8.9 11.7 14.6 16.6 16.4 14.1 10.6 7.1 4.2 (96)

Heat loss rate for mean internal temperature, Lm , W =[(39)m x [(93)m– (96)m ]
(97)m= 1599.15 1546.73 1398.77 1164.99 893.63 592.01 381.46 401.96 642.71 985.81 1315.97 1592.5 (97)

Space heating requirement for each month, kWh/month = 0.024 x [(97)m – (95)m] x (41)m
(98)m= 622.83 495.85 416.81 232.29 92.29 0 0 0 0 211.1 428.67 637.97

Total per year (kWh/year) = Sum(98) = 1...5,9...12 3137.8 (98)

Space heating requirement in kWh/m²/year 30.97 (99)

9a. Energy requirements – Individual heating systems including micro-CHP)

Fraction of space heat from secondary/supplementary system 0.1 (201)

Fraction of space heat from main system(s) (202) = 1 – (201) = 0.9 (202)

Fraction of total heating from main system 1 (204) = (202) × [1 – (203)] = 0.9 (204)

Efficiency of main space heating system 1 93.8 (206)

Efficiency of secondary/supplementary heating system, % 65 (208)

(211)m = {[(98)m x (204)] } x 100 ÷ (206) (211)

597.6 475.76 399.92 222.88 88.55 0 0 0 0 202.55 411.31 612.12

Total (kWh/year) =Sum(211) = 1...5,10.…12 3010.69 (211)

Space heating fuel (secondary), kWh/month = {[(98)m x (201)] } x 100 ÷ (208)

(215)m= 95.82 76.28 64.12 35.74 14.2 0 0 0 0 32.48 65.95 98.15

Total (kWh/year) =Sum(215) = 1...5,10.…12 482.74 (215)

Water heating: Efficiency of water heater 80.1 (216)

(217)m= 87.46 87.22 86.67 85.41 83.14 80.1 80.1 80.1 80.1 85.05 86.78 87.57 (217)

Fuel for water heating, kWh/month (219)m = (64)m x 100 ÷ (217)m

(219)m= 256.28 226.79 240.37 219.59 221.74 206.7 199.5 217.55 216.74 228.6 235.75 250.12

Total = Sum(219a) = 1...12 2719.74 (219)

Electricity for pumps, fans and electric keep-hot: central heating pump: 30 (230c); boiler with a fan-assisted flue 45 (230e)

Total electricity for the above, kWh/year sum of (230a)…(230g) = 75 (231)

Electricity for lighting 445.14 (232)

10a. Fuel costs - individual heating systems

Fuel	kWh/year	Fuel Price (Table 12)	Fuel Cost £/year
Space heating - main system 1	(211)	3.48 x 0.01	104.77 (240)
Space heating - main system 2	(213)	0 x 0.01	0 (241)
Space heating - secondary	(215)	4.23 x 0.01	20.42 (242)
Water heating cost (other fuel)	(219)	3.48 x 0.01	94.65 (247)
Pumps, fans and electric keep-hot	(231)	13.19 x 0.01	9.89 (249)
Energy for lighting	(232)	13.19 x 0.01	58.71 (250)
Additional standing charges (Table 12)			120 (251)
Total energy cost (245)...(247) + (250)…(254)			408.45 (255)

11a. SAP rating - individual heating systems

Energy cost deflator (Table 12)	0.42 (256)
Energy cost factor (ECF) [(255) x (256)] ÷ [(4) + 45.0]	1.17 (257)
SAP rating (Section 12)	83.64 (258)

12a. CO2 emissions – Individual heating systems including micro-CHP

Energy	kWh/year	Emission factor kg CO2/kWh	Emissions kg CO2/year
Space heating (main system 1)	(211)	0.216	650.31 (261)
Space heating (secondary)	(215)	0.019	9.17 (263)
Water heating	(219)	0.216	587.46 (264)
Space and water heating	(261) + (262) + (263) + (264)		1246.94 (265)
Electricity for pumps, fans and electric keep-hot	(231)	0.519	38.93 (267)
Electricity for lighting	(232)	0.519	231.03 (268)
Total CO2, kg/year sum of (265)…(271)			1516.9 (272)
CO2 emissions per m² (272) ÷ (4)			14.97 (273)
EI rating (section 14)			86 (274)

13a. Primary Energy

Energy	kWh/year	Primary factor	P. Energy kWh/year
Space heating (main system 1)	(211)	1.22	3673.04
Space heating (secondary)	(215)	1.04	502.05
Energy for water heating	(219)	1.22	3318.08
Space and water heating	(261) + (262) + (263) + (264)		7493.17
Electricity for pumps, fans and electric keep-hot	(231)	3.07	230.25
Electricity for lighting	(232)	0	1366.6
Total Primary Energy sum of (265)…(271)			9090.01 (272)
Primary energy kWh/m²/year (272) ÷ (4)			89.72 (273)

DER WorkSheet: New dwelling design stage

User Details:

Assessor Name: Demi Beneke Stroma Number: STRO027754

Software Name: Stroma FSAP 2012 Software Version: Version: 1.0.4.18

Property Address: House 2

Address : House 2

1. Overall dwelling dimensions

Area(m²) Av. Height(m) Volume(m³)

Ground floor 50.66 (1a) x 2.38 (2a) = 120.57 (3a)
First floor 50.66 (1b) x 2.68 (2b) = 135.77 (3b)
Total floor area TFA = (1a)+(1b)+(1c)+(1d)+(1e)+.....(1n) 101.32 (4)
Dwelling volume (3a)+(3b)+(3c)+(3d)+(3e)+.....(3n) = 256.34 (5)

2. Ventilation rate

Number of chimneys 0 + 0 + 0 = 0 x 40 = 0 (6a)
Number of open flues 0 + 0 + 0 = 0 x 20 = 0 (6b)
Number of intermittent fans 3 x 10 = 30 (7a)
Number of passive vents 0 x 10 = 0 (7b)
Number of flueless gas fires 0 x 40 = 0 (7c)
Infiltration due to chimneys, flues and fans = (6a)+(6b)+(7a)+(7b)+(7c) = 30 ÷ (5) = 0.12 (8)

Air permeability value, q50, expressed in cubic metres per hour per square metre of envelope area 5 (17)
If based on air permeability value, then (18) = [(17) ÷ 20]+(8), otherwise (18) = (16) 0.37 (18)
Number of sides sheltered 2 (19)
Shelter factor (20) = 1 - [0.075 x (19)] = 0.85 (20)
Infiltration rate incorporating shelter factor (21) = (18) x (20) = 0.31 (21)

Monthly average wind speed from Table 7 (22)m= 5.1 5 4.9 4.4 4.3 3.8 3.8 3.7 4 4.3 4.5 4.7

Wind Factor (22a)m = (22)m ÷ 4 (22a)m= 1.27 1.25 1.23 1.1 1.08 0.95 0.95 0.92 1 1.08 1.12 1.18

Adjusted infiltration rate (allowing for shelter and wind speed) = (21a) x (22a)m 0.4 0.39 0.38 0.34 0.34 0.3 0.3 0.29 0.31 0.34 0.35 0.37

Effective air change rate - enter (24a) or (24b) or (24c) or (24d) in box (25)
(25)m= 0.58 0.58 0.57 0.56 0.56 0.54 0.54 0.54 0.55 0.56 0.56 0.57 (25)

3. Heat losses and heat loss parameter

Fabric heat loss, W/K = S (A x U) (26)…(30) + (32) = 50.74 (33)

4. Water heating energy requirement

Output from water heater (annual) 1…12 2293.47 (64)

5. Internal gains

Total internal gains (73)m= 489.91 487.47 471.76 446.45 420.6 395.99 380.24 386.84 400.08 425.61 454.84 476.91 (73)

6. Solar gains

Solar gains in watts, calculated for each month (83)m= 70.52 128.11 196.47 278.95 344.86 356.63 337.89 286.54 224.69 147.3 85.92 59.41 (83)

Total gains – internal and solar (84)m= 560.43 615.58 668.23 725.4 765.46 752.62 718.14 673.38 624.77 572.9 540.76 536.33 (84)

7. Mean internal temperature (heating season)

Mean internal temperature (for the whole dwelling) (92)m= 18.62 18.78 19.08 19.51 19.89 20.12 20.17 20.17 20.03 19.56 19.03 18.6 (92)

8. Space heating requirement

Total per year (kWh/year) = Sum(98) = 1...5,9...12 3965.21 (98)

Space heating requirement in kWh/m²/year 39.14 (99)

12a. CO2 emissions – Individual heating systems including micro-CHP

Total CO2, kg/year sum of (265)…(271) = 1687.71 (272)
Dwelling CO2 Emission Rate (272) ÷ (4) = 16.66 (273)
EI rating (section 14) 85 (274)

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

TER WorkSheet: New dwelling design stage

User Details:

Assessor Name: Demi Beneke Stroma Number: STRO027754

Software Name: Stroma FSAP 2012 Software Version: Version: 1.0.4.18

Property Address: House 2

Address : House 2

2. Ventilation rate

Number of intermittent fans 4 x 10 = 40 (7a)
Infiltration due to chimneys, flues and fans = (6a)+(6b)+(7a)+(7b)+(7c) = 40 ÷ (5) = 0.16 (8)
Air permeability value, q50 5 (17)
(18) = [(17) ÷ 20]+(8) 0.41 (18)
Infiltration rate incorporating shelter factor (21) = (18) x (20) = 0.35 (21)

3. Heat losses and heat loss parameter

Doors Type 1 2.15 x 1 = 2.15 (26)
Doors Type 2 3.13 x 1.2 = 3.756 (26)
Floor 50.66 x 0.13 = 6.5858 (28)
Walls 104.03 15.13 88.9 x 0.18 = 16 (29)
Roof 50.66 0 50.66 x 0.13 = 6.59 (30)
Fabric heat loss, W/K = 48.14 (33)

4. Water heating energy requirement

Storage volume (litres) including any solar or WWHRS storage within same vessel 150 (47)
Manufacturer’s declared loss factor 1.7 (48)
Energy lost from water storage (48) x (49) = 0.92 (50)
Output from water heater (annual) 2175.52 (64)

8. Space heating requirement

Total per year (kWh/year) = Sum(98) = 1...5,9...12 4076.95 (98)

Space heating requirement in kWh/m²/year 40.24 (99)

12a. CO2 emissions

Total CO2, kg/year sum of (265)…(271) = 1765.98 (272)
TER = 17.43 (273)

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

SAP 2012 Overheating Assessment

Calculated by Stroma FSAP 2012 program, produced and printed on 17 June 2019

Property Details

Property Details:	House 2
Dwelling type:	Semi-detached House
Located in:	England
Region:	South England
Cross ventilation possible:	Yes
Number of storeys:	2
Front of dwelling faces:	North East
Overshading:	Average or unknown
Overhangs:	None
Thermal mass parameter:	Indicative Value Medium
Night ventilation:	False
Blinds, curtains, shutters:	None
Ventilation rate during hot weather (ach):	4 ( Windows open half the time)

Overheating Details

Summer ventilation heat loss coefficient	338.37 (P1)
Transmission heat loss coefficient	60.6
Summer heat loss coefficient	398.99 (P2)

Overhangs

Orientation	Ratio	Z_overhangs
North East (W1)	0	1
North West (W2)	0	1
North West (W3)	0	1
South West (W4)	0	1
North East (W6)	0	1
North East (W7)	0	1
North West (W8)	0	1
South West (W9)	0	1
South West (W10)	0	1

Solar shading

Orientation	Z blinds	Solar access	Overhangs	Z summer
North East (W1)	1	0.9	1	0.9 (P8)
North West (W2)	1	0.9	1	0.9 (P8)
North West (W3)	1	0.9	1	0.9 (P8)
South West (W4)	1	0.9	1	0.9 (P8)
North East (W6)	1	0.9	1	0.9 (P8)
North East (W7)	1	0.9	1	0.9 (P8)
North West (W8)	1	0.9	1	0.9 (P8)
South West (W9)	1	0.9	1	0.9 (P8)
South West (W10)	1	0.9	1	0.9 (P8)

Solar gains

Orientation (calculation for July) Area Flux g_ FF Shading Gains

Orientation	Area	Flux	g_	FF	Shading	Gains
North East (W1)	0.9 x 1.3	106.05	0.71	0.7	0.9	55.5
North West (W2)	0.9 x 0.72	106.05	0.71	0.7	0.9	30.74
North West (W3)	0.9 x 0.72	106.05	0.71	0.7	0.9	30.74
South West (W4)	0.9 x 1.07	127.31	0.71	0.7	0.9	54.84
North East (W6)	0.9 x 0.84	106.05	0.71	0.7	0.9	35.86
North East (W7)	0.9 x 1.3	106.05	0.71	0.7	0.9	55.5
North West (W8)	0.9 x 1.3	106.05	0.71	0.7	0.9	55.5
South West (W9)	0.9 x 1.3	127.31	0.71	0.7	0.9	66.63
South West (W10)	0.9 x 1.3	127.31	0.71	0.7	0.9	66.63

Total 451.93 (P3/P4)

Internal gains

	June	July	August
Internal gains	551.9	531.59	541.09
Total summer gains	1040.59	983.52	932.11 (P5)
Summer gain/loss ratio	2.61	2.47	2.34 (P6)
Mean summer external temperature (South England)	15.4	17.3	17.3
Thermal mass temperature increment	0.25	0.25	0.25
Threshold temperature	18.26	20.02	19.89 (P7)
Likelihood of high internal temperature	Not significant	Not significant	Not significant

Assessment of likelihood of high internal temperature: Not significant

Stroma FSAP 2012 Version: 1.0.4.18 (SAP 9.92) - http://www.stroma.com

Search

P574 SAP House 2

Summary

Document Viewer

Regulations Compliance Report

Project Information:

Dwelling Details:

Client Details:

1a TER and DER

1b TFEE and DFEE

2 Fabric U-values

2a Thermal bridging

3 Air permeability

4 Heating efficiency

Regulations Compliance Report

5 Cylinder insulation

6 Controls

7 Low energy lights

8 Mechanical ventilation

9 Summertime temperature

10 Key features

Predicted Energy Assessment

Energy Efficiency Rating

Environmental Impact (CO2) Rating

SAP Input

Property Details

Property description

Floor Location

Opening types

Opaque Elements

Thermal bridges

Ventilation

Main heating system

Main heating Control

Secondary heating system

Water heating

Others

SAP WorkSheet: New dwelling design stage

User Details

1. Overall dwelling dimensions

2. Ventilation rate

3. Heat losses and heat loss parameter

4. Water heating energy requirement: kWh/year

5. Internal gains (see Table 5 and 5a)

6. Solar gains

7. Mean internal temperature (heating season)

8. Space heating requirement

9a. Energy requirements – Individual heating systems including micro-CHP)

10a. Fuel costs - individual heating systems

11a. SAP rating - individual heating systems

12a. CO2 emissions – Individual heating systems including micro-CHP

13a. Primary Energy

DER WorkSheet: New dwelling design stage

1. Overall dwelling dimensions

2. Ventilation rate

3. Heat losses and heat loss parameter

4. Water heating energy requirement

5. Internal gains

6. Solar gains

7. Mean internal temperature (heating season)

8. Space heating requirement

12a. CO2 emissions – Individual heating systems including micro-CHP

TER WorkSheet: New dwelling design stage

2. Ventilation rate

3. Heat losses and heat loss parameter

4. Water heating energy requirement

8. Space heating requirement

12a. CO2 emissions

SAP 2012 Overheating Assessment

Property Details

Overheating Details

Overhangs

Solar shading

Solar gains

Internal gains

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