Home energy upgrade
Gas Absorption Heat Pump
A gas-driven heat pump that uses an absorption cycle to deliver significantly more heat than a standard condensing boiler — a lower-carbon upgrade for homes where an electric heat pump is not practical.
Step by step
How Gas Absorption Heat Pump installation works
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A heating engineer assesses your home's heat demand, existing pipework, and gas supply to size the system correctly.
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An MCS-certified installer designs the system and sources a compatible absorption unit — typically wall-hung or floor-standing.
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The unit is fitted in place of or alongside your existing boiler, connected to gas, water, and flue in a single installation visit.
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The system is commissioned and tested; you receive documentation confirming 0% VAT eligibility and any manufacturer warranty.
Why it's worth it
Benefits of Gas Absorption Heat Pump
- More efficient than a condensing gas boiler — delivers more heat per unit of gas consumed
- Lower carbon emissions than a conventional gas boiler without requiring an electrical supply upgrade
- 0% VAT on supply and installation under current energy-saving materials rules
- Suitable where the electricity supply or budget rules out an electric heat pump
- Can integrate with existing radiator systems, reducing retrofit complexity
- MCS certification available — look for certified installers to protect your investment
What to budget
Typical cost
Costs vary significantly depending on property size, existing systems, and installer. A surveyor's assessment will give you an accurate figure. Available grants (listed below) can substantially reduce the net cost.
Is this right for you?
Ideal for
- Properties on the gas grid where a full switch to an electric heat pump is not yet viable
- Larger homes, rural properties, or light-commercial buildings with high heat demand
- Homes with an existing wet radiator system and limited electrical capacity
- Off-grid or hybrid setups where gas (or LPG) remains the primary fuel
Financial support
Grants you may qualify for
View all UK energy grants →Ready to go?
Find MCS-certified Gas Absorption Heat Pump installers near you
Compare MCS-certified specialists in your area, check their credentials, and book a free assessment worth £380.
