GENERAL DETAILS
Terrain
Urban
Suburban
Rural
Conservatory
no conservatory
separated unheated conservatory
separated heated conservatory
not separated conservatory
Electricity tariff
Standard tariff
7 hr off-peak tariff
10 hr off-peak tariff
18 hr off-peak tariff
24 hr tariff
DIMENSIONS
Please note that there can be more than one floor type at each level of the house, for instance, with different heat loss types or
different storey heights.
Ground floor heights are measured Floor - ceiling; other levels are measured ceiling to ceiling except basements which are measured floor to floor
Heat loss floor types relate to the floor types in the heat losses section.
Living room area (sq.m.)
VENTILATION
Note: If a new dwelling is subject to a pressure test, a result greater than 10 cu.m/sq.m@50 Pa is a fail.
Less than 5 is achievable if using accredited details, but 7 would be a reasonable design permeability.
Select which best describes the construction (if no pressure test)
Masonry
Steel or timber frame
Select which best describes the ground floor (if no pressure test)
Solid or beam and block
suspended timber (sealed)
suspended timber (unsealed)
Select which best describes the ventilation
Natural with intermittent extract fans
Mechanical (positive input ventilation from loft)
Mechanical (positive input ventilation from outside)
Whole house centralised mechanical extract ventilation
Whole house de-centralised mechanical extract ventilation
Balanced whole house mechanical (no heat recovery)
Balanced whole house mechanical (with heat recovery)
If mechanical ventilation select data source
Default data
Data from manufacturer's data sheet
Data from database
If MV data source is datasheet or database
Number of Chimneys
Number of Flues
OPENINGS
OPENING TYPES
Description
Data source
Frame
Glass
gap
Argon
U-value
Solar transmittance (if window manufacturer's data)
1
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
2
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
3
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
4
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
5
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
6
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
7
SAP tables
Manufacturer
Wood
PVC-u
Metal
SG
Secondary
DG
TG
6mm
12mm
16mm or greater
yes
no
Overshading
Heavy
More than average
Average
Little
Schedule of windows, doors and rooflights
THERMAL BRIDGING
Default
Detailed or calculated
List of bridges ( if Detailed or calculated)
THERMAL MASS PARAMETER (select one option)
if using calculated values ot values from SAP table 1a
Element
Area
K value (if calculated)
Description (if SAP tables)
Floor (1)
Suspended timber, insulation between joists
Slab on ground, screed over insulation
Suspended concrete floor, carpeted
Timber exposed floor, insulation between joists
Floor (2)
Suspended timber, insulation between joists
Slab on ground, screed over insulation
Suspended concrete floor, carpeted
Timber exposed floor, insulation between joists
Floor (3)
Suspended timber, insulation between joists
Slab on ground, screed over insulation
Suspended concrete floor, carpeted
Timber exposed floor, insulation between joists
Ext walls (1)
Solid wall: dense plaster, 200mm dense block, insulated externally
Solid wall: plasterboard on dabs or battens, 200mm dense block, insulated externally
Solid wall: dense plaster, 210mm brick, insulated externally
Solid wall: plasterboard on dabs or battens, 210mm brick, insulated externally
Solid wall: dense plaster, insulation,any outside structure
Solid wall: plasterboard on dabs or battens, insulation,any outside structure
Cavity wall: dense plaster, dense block, filled cavity, any outside structure
Cavity wall: dense plaster, AAC block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, dense block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, AAC block, filled cavity, any outside structure
Timber framed wall: (one layer of plasterboard)
Timber framed wall: (Two layers of plasterboard)
Steel frame wall: (warm frame or hybrid construction)
Ext walls (2)
Solid wall: dense plaster, 200mm dense block, insulated externally
Solid wall: plasterboard on dabs or battens, 200mm dense block, insulated externally
Solid wall: dense plaster, 210mm brick, insulated externally
Solid wall: plasterboard on dabs or battens, 210mm brick, insulated externally
Solid wall: dense plaster, insulation,any outside structure
Solid wall: plasterboard on dabs or battens, insulation,any outside structure
Cavity wall: dense plaster, dense block, filled cavity, any outside structure
Cavity wall: dense plaster, AAC block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, dense block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, AAC block, filled cavity, any outside structure
Timber framed wall: (one layer of plasterboard)
Timber framed wall: (Two layers of plasterboard)
Steel frame wall: (warm frame or hybrid construction)
Ext walls (3)
Solid wall: dense plaster, 200mm dense block, insulated externally
Solid wall: plasterboard on dabs or battens, 200mm dense block, insulated externally
Solid wall: dense plaster, 210mm brick, insulated externally
Solid wall: plasterboard on dabs or battens, 210mm brick, insulated externally
Solid wall: dense plaster, insulation,any outside structure
Solid wall: plasterboard on dabs or battens, insulation,any outside structure
Cavity wall: dense plaster, dense block, filled cavity, any outside structure
Cavity wall: dense plaster, AAC block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, dense block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, AAC block, filled cavity, any outside structure
Timber framed wall: (one layer of plasterboard)
Timber framed wall: (Two layers of plasterboard)
Steel frame wall: (warm frame or hybrid construction)
Roof (1)
Plasterboard, insulated at ceiling level
Plasterboard, insulated slope
Plasterboard, insulated flat roof
Roof (2)
Plasterboard, insulated at ceiling level
Plasterboard, insulated slope
Plasterboard, insulated flat roof
Roof 3)
Plasterboard, insulated at ceiling level
Plasterboard, insulated slope
Plasterboard, insulated flat roof
Basement wall
Solid wall: dense plaster, 200mm dense block, insulated externally
Solid wall: plasterboard on dabs or battens, 200mm dense block, insulated externally
Solid wall: dense plaster, 210mm brick, insulated externally
Solid wall: plasterboard on dabs or battens, 210mm brick, insulated externally
Solid wall: dense plaster, insulation,any outside structure
Solid wall: plasterboard on dabs or battens, insulation,any outside structure
Cavity wall: dense plaster, dense block, filled cavity, any outside structure
Cavity wall: dense plaster, AAC block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, dense block, filled cavity, any outside structure
Cavity wall: plasterboard on dabs or battens, AAC block, filled cavity, any outside structure
Timber framed wall: (one layer of plasterboard)
Timber framed wall: (Two layers of plasterboard)
Steel frame wall: (warm frame or hybrid construction)
Party wall (1)
Dense plaster both sides, dense blocks, cavity
Single plasterboard on dabs on both sides, dense blocks, cavity
Plasterboard on dabs and single plasterboard on both sides, dense cellular blocks, cavity
Plasterboard on dabs mounted on cement render on both sides, AAC blocks, cavity
Double plasterboard on both sides, twin timber frame with/without sheathing board
Steel frame
Party wall (2)
Dense plaster both sides, dense blocks, cavity
Single plasterboard on dabs on both sides, dense blocks, cavity
Plasterboard on dabs and single plasterboard on both sides, dense cellular blocks, cavity
Plasterboard on dabs mounted on cement render on both sides, AAC blocks, cavity
Double plasterboard on both sides, twin timber frame with/without sheathing board
Steel frame
Party Ceilings
Precast concrete planks floor, screed, carpeted
Concrete floor slab, carpeted
Precast concrete planks floor, screed laid on insulation, carpeted
Precast concrete planks floor, screed laid on rubber, carpeted
In-situ concrete slab supported by metal deck, carpeted
Timber I-joists, carpeted
Party floors
Precast concrete planks floor, screed, carpeted
Concrete floor slab, carpeted
Precast concrete planks floor, screed laid on insulation, carpeted
Precast concrete planks floor, screed laid on rubber, carpeted
In-situ concrete slab supported by metal deck, carpeted
Timber I-joists, carpeted
Internal floors from above
Plasterboard ceiling, carpeted chipboard floor
Internal floors from below
Plasterboard ceiling, carpeted chipboard floor
FABRIC HEAT LOSSES
If you know the U-value of the element you do not need to give the wall description. The element description is necessary for working out the U-value
If you need a U-value calculation done for a floor it is best if you complete the request for a U-value calculation by clicking the link.
SPACE HEATING
Fuel for main heating system
mains gas
bulk LPG
bottled LPG
heating oil
biodiesel
biodiesel from vegetable oil
B30K
bioethanol
house coal
anthracite
manufactured smokeless fuel
wood logs
wood pellets (bulk)
wood chips
dual fuel appliance (mineral and wood)
electricity standard tariff
electricity off-peak 7 hours
electricity off-peak 10 hours
electricity off-peak 18 hours
electricity off-peak 24 hours
Main heating system type
wet system with rads or underfloor
electric storage system
warm air system
room heater system
community heating
electric underfloor heating
other system
emitter type
radiators
underfloor heating, pipes in insulated timber floor
underfloor heating, pipes in screed above insulation
underfloor heating, pipes in concrete slab
radiators and underfloor heating, pipes in insulated timber floor
radiators and underfloor heating, pipes in screed above insulation
radiators and underfloor heating, pipes in concrete slab
fan coil units
N/A
Details of boiler (model if possible)
Details of heating control system
no time or thermostatic control of room temperature
programmer, no room thermostat
room thermostat only
programmer and room thermostat
programmer and at least two room thermostats
programmer, room thermostat and TRVs
TRVs and bypass
programmer, TRVs and bypass
programmer, TRVs and flow switch
programmer, TRVs and boiler energy manager
time and temperature zone control
manual charge control - storage heaters
automatic charge control - storage heaters
Celect-type controls - storage heaters
appliance thermostats (room heaters)
programmer and appliance thermostats (room heaters)
If boiler and rads, is the pump in a heated space?
yes
no
Weather compensator?
yes
no
Load compensator?
yes
no
Enhanced load compensator?
yes
no
Delayed start thermostat?
yes
no
Is the boiler interlocked with the cylinder stat and room stat?
yes
no
COMMUNITY HEATING
Distribution
Piping <=1990, not pre-insulated, med. or high temp.(120-140 deg), full flow
Piping <=1990, pre-insulated, low temp.(<=100 deg),full flow
Piping >=1991, pre-insulated, higher temp.(<=120 deg), variable flow
Piping >=1991, pre-insulated, full control system (<=100 deg), variable flow
calculated
unknown
Distribution loss factor (DLF if calculated)
Controls
flat rate charging, no thermostatic control of room temperature
flat rate charging, programmer, no room thermostat
flat rate charging, room thermostat only
flat rate charging, programmer and room thermostat
flat rate charging, TRVs
flat rate charging, programmer and TRVs
charging linked to use, room thermostat only
charging linked to use, programmer and room thermostat
charging linked to use, TRVs
charging linked to use, programmer and TRVs
Heat/power ratio
SPACE HEATING Second system
Fuel for secondmain heating system
mains gas
bulk LPG
bottled LPG
heating oil
biodiesel
biodiesel from vegetable oil
B30K
bioethanol
house coal
anthracite
manufactured smokeless fuel
wood logs
wood pellets (bulk)
wood chips
dual fuel appliance (mineral and wood)
electricity standard tariff
electricity off-peak 7 hours
electricity off-peak 10 hours
electricity off-peak 18 hours
electricity off-peak 24 hours
Second main heating system type
wet system with rads or underfloor
electric storage system
warm air system
room heater system
community heating
electric underfloor heating
other system
emitter type
radiators
underfloor heating, pipes in insulated timber floor
underfloor heating, pipes in screed above insulation
underfloor heating, pipes in concrete slab
radiators and underfloor heating, pipes in insulated timber floor
radiators and underfloor heating, pipes in screed above insulation
radiators and underfloor heating, pipes in concrete slab
fan coil units
N/A
Details of boiler (model if possible)
Details of second heating control system
no time or thermostatic control of room temperature
programmer, no room thermostat
room thermostat only
programmer and room thermostat
programmer and at least two room thermostats
programmer, room thermostat and TRVs
TRVs and bypass
programmer, TRVs and bypass
programmer, TRVs and flow switch
programmer, TRVs and boiler energy manager
time and temperature zone control
manual charge control - storage heaters
automatic charge control - storage heaters
Celect-type controls - storage heaters
appliance thermostats (room heaters)
programmer and appliance thermostats (room heaters)
If boiler and rads, is the pump in a heated space?
yes
no
WATER HEATING
Fuel for water heating system
How is water heated
from main heating system
from main heating system with summer immersion
from main system, back boiler (water only), gas
from main system, circulator in gas warm air system, pre 1998
from main system, circulator in gas warm air system, 1998 or later
from secondary heating system
electric immersion heater
single point gas water heaters
multi-point gas water heater
electric instantaneous at point of use
gas boiler/circulator for water heating only
oil boiler/circulator for water heating only
solid fuel boiler/circulator for water heating only
range cooker/boiler, gas, single burner with permanent pilot
range cooker/boiler, gas, single burner with automatic ignition
range cooker/boiler, gas, twin burner with permanent pilot pre 1998
range cooker/boiler, gas, twin burner with automatic ignition pre 1998
range cooker/boiler, gas, twin burner with permanent pilot 1998 or later
range cooker/boiler, gas, twin burner with automatic ignition 1998 or later
range cooker/boiler, oil, single burner
range cooker/boiler, oil, twin burner pre 1998
range cooker/boiler, oil, twin burner 1998 or later
range cooker/boiler, solid fuel, integrated oven and boiler
range cooker/boiler, solid fuel, independent oven and boiler
from hot-water only community scheme - boilers
from hot-water only community scheme - CHP
from hot-water only community scheme - heat pump
from heat pump
Water storage details if appropriate
Storage volume (litres)
Cylinder insulation type
factory foam
quilt
Cylinder insulation thickness
none
25mm
32mm
38mm
50mm
60mm
If known, manufacturer's declared heat loss factor (kWh per day)
Is cylinder in a heated space
yes
no
If water heated solely by immersion heater or immersion heater is necessary during the summer e.g if the main heating is by room heaters or water is heated by a back boiler.
SOLAR WATER HEATING
WASTE WATER HEAT RECOVERY
Waste water heat recovery 1:
Waste water heat recovery 2:
FLUE GAS HEAT RECOVERY
SECONDARY HEATING
COOLING SYSTEM
Array2
WIND TURBINES
HYDRO-ELECTRIC GENERATION
SPECIAL FEATURES
Special feature 1
Special feature 2
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