Uswitch republished its guide to new boiler costs, installers and offers on 21 March 2025, setting out typical installation prices and the terms attached to four installer offers it lists1. The comparison page carries the line "Updated on 21 March 2025"1. A separate Uswitch boiler cover comparison page carries the same update date2.
The guide gives average costs including installation by boiler type1:
| Boiler type | Cost including installation |
|---|---|
| System boiler | £1,580 to £5,000 |
| Conventional boiler | £1,600 to £5,000 |
Four installers are listed with offers for Uswitch customers1. Glow Green offers "£100 off select boilers + free boiler service worth £95.88*", with the free service conditional on signing up to Glow Care 100 or 300 at the point of order; Uswitch states there is no charge for the first 12 months and payments start from month 131. Heatable offers "£150 cashback from Heatable +", paid after successful installation and payment of a qualifying boiler1. iHeat offers a free Hive Mini Smart Thermostat using code "HIVEMINI", and states the code cannot be combined with other codes or promotions and cannot be claimed after installation is complete1. British Gas is listed with "No current offers"1.
Finance terms differ by installer: 0% APR over 2 or 4 years at Glow Green, 0% APR over 4 years at Heatable, 0% APR over 3 years at British Gas with £0 deposit options, and 0% APR over 2 years at iHeat1. All four list installation included and warranties of up to 12 years1. Trustpilot scores quoted are 4.6 out of 5 from 10,491 reviews for Glow Green, 4.8 from 12,270 reviews for Heatable, 4.8 from 10,254 reviews for British Gas and 4.8 from 9,643 reviews for iHeat1. British Gas New Heating Limited is described as an appointed representative of British Gas Services Limited, authorised and regulated by the Financial Conduct Authority1.
On grants, the guide states the government's Boiler Upgrade Scheme offers £5,000 towards installing a biomass boiler, and that energy suppliers are obligated to offer energy-efficient boiler grants under the Energy Companies Obligation scheme1. It does not set out eligibility criteria for either. Uswitch's senior content editor Ben Gallizzi is quoted in the guide:
The guide states a well-maintained boiler can last up to 15 years, and that one past the 10-year mark is probably less efficient than it once was1. It lists frequent breakdowns, rising heating bills, slower hot water, unusual noises, leaks and odd smells as signs a boiler may need replacing, adding that not all such issues require replacement1. On gas smells it directs readers to the National Gas Emergency Service on 0800 111 9991. Installation is described as usually taking no more than a day unless the work is more complicated, with a range of four to six hours up to a couple of days given elsewhere on the page1.
Why it matters for households
A boiler is the main heating appliance in most UK homes, so its purchase price, finance terms and warranty length bear directly on how much a household spends to stay warm and how much control it has over that spending. The guide's figures show the upfront range a household faces, from £1,500 to £5,000 depending on boiler type, and the finance terms on offer, which determine whether the cost is paid at once or spread over two to four years at 0% APR1. Warranty length and whether installation is included affect the total cost of ownership rather than the sticker price alone1.
The offers listed are conditional. The Glow Green service is tied to a care plan that becomes chargeable from month 13, and the iHeat thermostat code cannot be combined with other promotions or claimed after installation1. Households comparing quotes therefore need to read the conditions attached to each, not just the headline figure. The guide's grant information is limited: it names the Boiler Upgrade Scheme and the Energy Companies Obligation but does not set out who qualifies, and no eligibility detail for either scheme appears on the page1.
What happens next
No next steps are dated in the material. The guide carries an update date of 21 March 2025 but no expiry dates for the offers listed, and no date is given for when the Glow Green care plan payments begin beyond month 13 of the plan1.