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The HACKS calculator reviews the current energy set up at your home and provides solutions to make your home more energy efficient

Not sure on where to start on your energy efficiency journey? Don't worry, our online calculator is here to help. The calculator will ask you a series of questions about the energy set up at your home and determine the best solutions for you. The results are based on real-world data

Your energy summary

  • C8 Actual efficiency of the heating system
  • C13 Amount of hot water used per year
    litres
  • C14 Annual hot water energy consumption
    kWh
  • E23 Total annual energy consumption
    Actual energy consumption for heating and hot water kWh
  • G23 Annual costs
    £
  • I23 Annual CO₂ emissions
    t CO₂
  • C36 Annual fuel energy consumption to heat home (per square metre)
    This is the energy that your heating system needs going into it kWh/m²*y
  • C37 Annual energy requirements to heat home (per square metre)
    This is the energy that your heating system puts into your home kWh/m²*y
  • C38 Assumed energy efficiency level (A-G)
    On a scale of A-G, A is the most efficient (not EPC)
  • C39 Solar energy

Household data

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Years
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People
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Your current energy consumption

Fill the 'Current system for heating your home' field
kWh
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£/unit
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g CO₂/kWh
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£/kWh
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£/unit
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g CO₂/kWh
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£/kWh
litres
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£/unit
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g CO₂/kWh
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£/kWh
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£/unit
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g CO₂/kWh
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£/kWh
kg
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£/unit
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g CO₂/kWh
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£/kWh
kg
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£/unit
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g CO₂/kWh
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£/kWh

Choosing your new heating system







Choosing energy efficiency measures




Lifetime of the new system

Years
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Your results

Actual system E26 Air-to-air heat pump E27 Air-to-water heat pump E28 Ground source heat pump E29 Condensing gas boiler E30 Condensing oil boiler E31 Pellet stove E32 Wood stove
D51 Your current energy consumption
kWh/year
D52 Actual energy requirements for heating
(the amount of energy needed to heat your home)

kWh/year
D53 Actual costs
£/year
D54 Actual CO₂ emissions
t CO₂/year
D55 Energy saving from new home insulation measures
kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year
D57 Estimated energy consumption
(this is the amount you would see on your energy bills) - for the selected option

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year
D56 Energy required after new home insulation measures
kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year

kWh/year
D58 Total annual cost
£/year

£/year

£/year

£/year

£/year

£/year

£/year
D59 Total CO₂ emissions
t CO₂/year

t CO₂/year

t CO₂/year

t CO₂/year

t CO₂/year

t CO₂/year

t CO₂/year
D60 Annual cost savings (%)
£/%
(%)
£/%
(%)
£/%
(%)
£/%
(%)
£/%
(%)
£/%
(%)
£/%
D61 Annual CO₂ emission savings (%)
t CO₂/year
(%)
t CO₂/year
(%)
t CO₂/year
(%)
t CO₂/year
(%)
t CO₂/year
(%)
t CO₂/year
(%)
t CO₂/year
D62 Equivalent CO₂ emissions saved (driving car)
km/year by car

km/year by car

km/year by car

km/year by car

km/year by car

km/year by car

km/year by car
D63 Lifetime cost savings
£

£

£

£

£

£

£
D64 Lifetime CO₂ emissions
t CO₂

t CO₂

t CO₂

t CO₂

t CO₂

t CO₂

t CO₂
D65 Lifetime CO₂ savings
t CO₂

t CO₂

t CO₂

t CO₂

t CO₂

t CO₂

t CO₂
D66 Lifetime equivalent CO₂ emissions saved (driving car)
km by car

km by car

km by car

km by car

km by car

km by car

km by car