Glow-worm at trade prices
Practical, budget-conscious boilers
Part of the same group as Vaillant, Glow-worm offers a lower-cost route to a reliable gas boiler without unfamiliar parts. It suits landlords, developers and volume replacement work where predictable servicing matters more than premium features.
- Energy & Betacom boilers
- Landlord and developer specifications
- Widely stocked spares
24+ products
Buying guides
Radiators Buying Guide: How to Choose Radiators for Any Room
Everything you need to compare radiator types, outputs and sizes before you buy — written for installers and homeowners.
HeatingBoilers Buying Guide: Combi, System and Regular Compared
How to choose between combi, system and regular boilers — output, hot water demand, fuel type and the parts every swap needs.
HeatingHow to Size a Radiator: BTU Calculations Made Simple
A step-by-step method for working out the BTU output a room needs, and how to turn that figure into a radiator height and width.
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StelradDelivery you can plan around
Free delivery over £100 ex VAT. Standard UK mainland delivery is £6.95 ex VAT.
Delivery information14-day standard returns
Eligible unused items may be returned within 14 days of delivery. Statutory rights are unaffected.
Returns policySecure checkout
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How we handle your dataTalk to our team
Mon–Fri 8am–5:30pm on 0330 043 4559 — specification checks, availability and project pricing.
Contact usStandard UK mainland delivery is £6.95 and free on orders over £100 ex VAT. Heavy or palletised items, the Highlands, Islands and Northern Ireland are quoted separately at checkout.