Claims and assumptions

Running costs – cheaper than gas and lowers your bills  

Switching from a gas boiler to a ground source heat pump on the Superloop should reduce your energy bills. Once installed, you’ll likely save hundreds of pounds each year compared to running a gas boiler. Typical households should expect to save £150–£500 per year, with larger homes likely to save more. Actual savings depend on factors such as your property size, insulation and how much heating you use. This is a ~25-40% saving on your heating bill – likely the single biggest thing you can do to reduce your heating bills.  

We’ve taken 3 illustrative examples to give you a better idea of what your property’s savings may look like with a Superloop heat pump.   

Coming soon: our savings calculator, so you can see what switching could mean for your home. In the meantime, you can explore the journey and timelines melbourn.energysuperloop.co.uk  

Assumptions for the above table:   

  • • Energy demand is based on Ofgem’s low, medium and high usage house profiles
    • Low use: Flat or 1 bed, 1-2 people. Elec usage: 1,800kWh, Gas usage: 7,500kWh  
    • Medium use: 2-3 bed, 2 – 3 people. Elec usage: 2,700kWh, Gas usage: 11,500kWh  
    • High use: 4+ bed, 4-5 people. Elec usage: 4,100kWh, Gas usage: 17,000kWh.  
    • Heat pump energy consumption is based off a 500% typical seasonal coefficient of performance from a Kensa Superloop heat pump, and an assumed 85% gas boiler efficiency.  
  • Superloop pricing includes a yearly Superloop Network Standard Charge, currently set at £120 (and to increase only with UK CPI inflation annually going forwards).   
  • Savings calculations are based on no remaining gas supply at each property after the heat pump installation.   
  • Energy price cap tariff for standard gas and electricity tariff, and Octopus Cosy rates for smart tariff :
    • Gas: 6.33p/kWh (Ofgem price cap as of October 2025)  
    • Electricity: 25.7p/kWh (Ofgem price cap as of October 2025) 
    • Smart tariff (Octopus Cosy, UK blended average): 20.6p/kWh  

 

 

Carbon case heat pumps vs gas  

Switching from a gas boiler to the Superloop can reduce home heating emissions by almost 90%! For the average household, that’s a saving of 2 tonnes of CO₂ every year – the equivalent of taking a petrol car off the road, or avoiding up to 10,000 miles of driving.  

Replacing your boiler with a heat pump saves the same carbon as avoiding 3-8 return flights from London to Barcelona each year. Every household that joins Superloop makes a big difference – not just to bills, but also to the climate.  

 

If you want to go deeper:  

  • Switching from a gas boiler to the Superloop is one of the single biggest things you can do for the climate at home. The typical household in Melbourn will cut 2 tonnes of CO₂ a year, that’s almost a 90% reduction. To put it in context:
    • Going vegetarian for a year saves about 0.5 tonnes  
    • Giving up flying to Europe for a year saves 1-2 tonnes  
    • Driving an electric car instead of petrol saves around 1-2 tonnes  

 

Assumptions/data to back this all up:  

  • Comparison based on typical UK carbon emission factors of gas and electricity (SAP 10.2). Gas fuel emissions of 210 gCO2/kWh and electricity fuel emissions of 136 gCO2/kWh.
  • Petrol car consumes 0.143kg CO2 per km driven, say 10,000 miles (16,000 kilometres) is 2.3 tonnes of CO2 per year
    • Source: DfT   
  • EV emissions are 0.18kWh/km, with 0.125kgCO2 per kWh, so 0.023kgCO2/km, so 10,000 miles is 0.36 tonnes, so 2.34tonnes of CO2 per year saved if replacing the petrol car
  • Omnivore to Vegetarian diet is ~0.3-1.0 tonnes per year, so 0.5 as estimate
  • Short haul flight is 0.175kgCO2/km, so a 2280km London-Barcelona return is 0.4tCO2, and if you add radiative forcing multiplier of 1.9 it’s 0.75tCO2 return

 

Cleaner air

Gas boilers are a major source of both indoor and outdoor air pollution. Gas boilers and cookers pump NO2, PM2.5 and other harmful pollutants into the places our families spend the most time – kitchens, living rooms, and playing out on the street.  In London, gas boilers are responsible for around 72% of NO₂ emissions, and studies link them to a higher risk of childhood asthma.   

Switching to a Superloop heat pump helps cut these pollutants, making your home a cleaner and safer space.  

Source: York for London and Clean Air Hub   

 

Property value  

Switching from gas to Superloop can also boost property value. Research from the WWF and Scottish Power shows that homes with a heat pump typically sell for £5,000-£8,000 more. Savills reinforces this, finding that homes with heat pumps attract a premium, as buyers increasingly value low-carbon, energy-efficient homes. This reflects not only the reduced running costs and lower carbon footprints, but also the reassurance that the property is compliant with future regulations and won’t require disruptive upgrades later.   

In short, homes with heat pumps are cheaper to run, cleaner to live in and more attractive to buyers.  

Sources: Savills and WWF/Scottish Power