Heat Pump Sizing Calculator
Property Address
Type of Project
Existing Property
New Build
Property Type
House
Flat
Bungalow
Built Form
Detached
Semi-Det.
End Terrace
Mid Terrace
Rooms
Bedrooms
1
2
3
4
5
6+
Bathrooms
0
1
2
3
4
5+
Number of Floors
1 Floor
2 Floors
3 Floors
4+ Floors
When Was the Property Built?
Pre-1900
1900–1929
1930–1975
1976–1995
1996–2006
2007+
Floor Area & Fuel Source
m²
ft²
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Wall Material
Cavity Wall
Solid Brick
Solid Stone
Concrete
Timber
Cavity Wall Insulation
Insulated
Uninsulated
Roof / Loft Insulation
None
50mm
100mm
150mm
200mm
250mm+
Heating Distribution
Radiators
Underfloor
Both
Not Sure
Hot Water Required?
Yes
No
Not Sure
Recommended Heat Pump Size
—
kilowatts (kW)
Raw heat loss: — kW · Design load (inc. margin): — kW
—
Hot Water Cylinder (L)
—
Floor Area (m²)
—
Loss Rate (W/m²)
⚠️ Indicative estimate based on EN 12831 / MCS simplified methodology. A full on-site heat loss survey by a qualified MCS installer is required before purchasing equipment.