Costs

How much will a heat pump reduce your energy bill?

Running costs were calculated for the typical homes using in-depth modelling at hourly intervals across a year, using Scottish climate data. 

 It was found that all houses on oil and electric heating could have lower energy bills when moving to a heat pump in 2025 (with energy efficiency upgrades) and just over half of those currently with gas boilers.

This data was from The Affordable Warmth report produced by Fabrice Leveque, Climate & Energy Policy Manager, at WWF Scotland.

The cost of your heat pump depends on many factors:

  • The size of your house
  • The number of bedrooms
  • Age of property
  • Age of your heating system
  • Insulation level

Energy bill savings in typical homes

1. DETACHED
PRE 1919

SOLID WALLS
FLOOR AREA: 257M2

OIL 52%
ELECTRIC 35%
GAS 33%

2. DETACHED
1919-82

CAVITY WALLS
158M2

OIL 34%
ELECTRIC 36%
GAS 12%

3. SEMI DETACHED
1919-82

CAVITY WALLS
102M2

OIL 20%
ELECTRIC 26%
GAS 7%

4. MODERN SEMI-D
POST 1982

CAVITY WALLS
98M2

OIL 19%
ELECTRIC 31%
GAS 4%

5. MID-TERRACE
HOUSE 1919-82

CAVITY WALLS
94M2

OIL 20%
ELECTRIC 25%
GAS 4%

6. BUNGALOW POST
1919

CAVITY WALLS
105 M2

OIL 29%
ELECTRIC 34%
GAS 6%

7. CHALET-BUNGALOW
PRE 1919

SOLID WALLS
157M2

OIL 42%
ELECTRIC 29%
GAS 20%

8. CHALET-BUNGALOW
POST 1919

CAVITY WALLS
137M2

OIL 29%
ELECTRIC 34%
GAS 4%

9. TENEMENT-FLAT
(MID) PRE 1919

SOLID WALLS
82M2

OIL 25%
ELECTRIC 32%
GAS 2%

10. MODERN
TENEMENT FLAT (MID)

CAVITY WALLS
69M2

OIL 1%
ELECTRIC 0%
GAS 23%

11. FOUR-IN-BLOCK
FLAT (GROUND)
1919-82

CAVITY WALLS
70M2

OIL 19%
ELECTRIC 31%
GAS 5%

12. FOUR-IN-BLOCK
FLAT (TOP) 1919-82

CAVITY WALLS
70M2

OIL 8%
ELECTRIC 26%
GAS 13%

Air Source Heat Pump, Biggar, Scotland.

Type of house Detached
Age of house 15 years
Number of bedrooms3
Size 192m2
Heat pump choice Air source Nibe
Install cost 8kW ASHP
£10,800
Est funding £10.000
Running cost £1,041 per annum
RHI income* £8,400
RHI new income rate £11,332

*Based on the old RHI income

Ground Source Heat Pump, Peterculter, Scotland.

Type of house Terrace
Age of house 15 years
Number of bedrooms5
Size 257m2
Heat pump choice Ground source
Install cost Idm 15kW HGL
£24,950
Est funding £10,000
Running cost £1,345 per annum
RHI income £28,933

To read more examples of heat pumps we have previously fitted download our guide now.

Also includes information about the Renewable Heat Incentive payments and financing your heat pump.
Download your guide now