Aira Heat Pump performance dashboard

How do Aira Heat Pumps perform in real homes across the UK? We dug into the data.

So much more affordable than a boiler

We looked at real energy usage from Aira Heat Pumps in UK homes and compared it to what the same homes would have paid using a gas boiler. The result? Our customers are saving. A lot.

Average yearly savings vs a gas boiler (with a connected tariff)

£295/Y

Average yearly savings vs a gas boiler (with a connected tariff)

£295/Y

Savings grow with a connected tariff

By connecting their energy tariff in the Aira app, customers allow Aira Intelligence to adjust heating around their tariff’s electricity prices. And the data shows it’s helping customers save even more on their energy bills.

Average yearly savings for customers using fixed standard electricity rates

Based on average UK gas and electricity prices using a fixed electricity rate across the year when no tariff is connected in the Aira app.

Average yearly savings for customers connected to a Cosy Octopus tariff

Customer savings when Aira Intelligence optimises heating around Cosy Octopus electricity prices.

Average yearly savings for customers connected to a tariff in the Aira app

Customer savings across all connected tariffs using Aira Intelligence tariff optimisation.

Average additional yearly saving for homes no longer paying gas standing charge

Based on Ofgem’s average gas standing charge from April 2025 of 32.67p per day for homes that fully disconnected from gas after switching to an Aira Heat Pump.

Your actual savings will vary depending on system design, tariff choice, home insulation, comfort setting and your energy use. Gas boiler assumed at 85% efficiency based on UK government study. Data only includes Aira Heat Pumps with at least one full year of performance data to ensure a fair yearly comparison.

How efficient is the Aira Heat Pump?

We measure our heat pumps’ efficiency using SPF-4, not COP. It’s a real-world measure of performance. It’s more honest. And still shows Aira Heat Pumps are at least 4X more efficient than a typical gas boiler.

Avg. SPF: April 2026

4.21

Avg. SPF: March 2026

4.08

Avg. SPF: Last winter 
(Nov to Mar)

3.79

Typical gas boiler efficiency

0.85

Avg. SPF: April 2026

4.21

Avg. SPF: Last winter 
(Nov to Mar)

3.79

Avg. SPF: March 2026

4.08

Typical gas boiler efficiency

0.85

Average Aira Heat Pump efficiency through winter

Heat pumps work hardest in winter. And this is when performance really matters. Here’s how Aira Heat Pumps performed across real homes in the coldest months of the year.

Aira Heat Pump (SPF-4)
Typical gas boiler efficiency
SPF performance data by month
MonthAira Heat Pump (SPF-4)Typical gas boiler efficiency
November4.670.85
December3.710.85
January3.400.85
February3.860.85
March4.080.85

Boiler efficiency figures are based on field trial data from a UK government study, reflecting average real-world performance across UK homes.

Cleaning up UK home heating

Heating homes is responsible for around 18% of the UK’s greenhouse gas emissions.¹ One of the biggest culprits? Gas boilers. Around 85% of UK homes still use them. So, we looked at how much energy Aira Heat Pumps use in real homes, and compared it to the emissions a gas boiler would have produced to deliver the same amount of heat.

Average yearly CO₂ savings per Aira Heat Pump vs a gas boiler

1,715kg

Average yearly CO₂ savings per Aira Heat Pump vs a gas boiler

1,715kg

The impact of each Aira Heat Pump home adds up. Fast.


Equivalent to taking a petrol car off the road for 10 months.


Equivalent to taking 4 return flights between London and Barcelona every year


Equivalent to planting 70 trees every year

The average yearly CO₂ saving per Aira Heat Pump is calculated using systems with at least one full year of performance data (installed before 1 May 2025) to give the clearest picture of yearly performance.

See what you could save with an Aira Heat Pump

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¹ The claim that heating homes accounts for around 18% of the UK’s greenhouse gas emissions is based on a report by the National Audit Office. You can read the full report here.