How long does a boiler swap take?

One day for a like-for-like combi swap, two to three days for a system conversion.

Is a magnetic filter worth it?

Yes — most manufacturers now require one for the warranty to stand.

Cost guide

Boiler and heating work is priced per installation. Only a Gas Safe registered engineer may legally work on gas appliances.

Pick what you need — we'll price it at current gas / heating engineer rates.

What needs doing

Swap a combi boiler like-for-like
£1,800–£3,000 per boiler · Includes boiler, flue, filter and a power flush.
Convert system to combi
£3,000–£4,800 per system · Removing the cylinder and tanks frees up a cupboard and loft.
Annual boiler service
£80–£140 per service · Landlords also need a CP12 gas safety certificate.
Power flush the system
£400–£800 per system · Priced by the number of radiators, typically £45–£70 each.
Fit a smart thermostat
£120–£280 per thermostat · Wireless models avoid running new cable through the house.

WhereWhenProperty

Job	Unit	Typical price
Swap a combi boiler like-for-likeIncludes boiler, flue, filter and a power flush.	per boiler	£1,800–£3,000
Convert system to combiRemoving the cylinder and tanks frees up a cupboard and loft.	per system	£3,000–£4,800
Annual boiler serviceLandlords also need a CP12 gas safety certificate.	per service	£80–£140
Power flush the systemPriced by the number of radiators, typically £45–£70 each.	per system	£400–£800
Fit a smart thermostatWireless models avoid running new cable through the house.	per thermostat	£120–£280

Ex VAT. South East baseline — the calculator adjusts for your region.

How long does a boiler swap take?: One day for a like-for-like combi swap, two to three days for a system conversion.
Is a magnetic filter worth it?: Yes — most manufacturers now require one for the warranty to stand.

Describe the job once and vetted gas / heating engineers come back to you with priced quotes. Free, and no obligation.