trades and handymen brand
Joule
Joule is a Northern Ireland cylinder manufacturer whose Cyclone range is built in duplex stainless steel for direct and indirect installations. It fits both boiler and heat pump setups where a merchant stocks the size needed.
Last reviewed 13 September 2026
Built in
United Kingdom (Portadown)
Manufacturing since
1972
UK availability
Available in the UK, smaller network
Sold across the UK through plumbing and heating merchants and Joule-approved installers.
What Joule builds
Joule model ranges
| Range | What it is |
|---|---|
| Cyclone | stainless steel unvented cylinder, direct and indirect |
How Joule compares
These are the makes buyers actually cross-shop against Joule.
Joule vs Ariston
Ariston is an Italian water heating manufacturer whose Velis Evo electric storage heaters use a twin-tank design to fit slim spaces such as cupboards and utility rooms. They suit a flat, annexe or holiday let with no boiler-fed hot water.
Joule vs Baxi
Baxi has made boilers in Britain since 1866 and now builds its gas boilers at a factory in Preston. Its 600 and 800 combi ranges are common replacements in houses and flats, and it also sells heat pumps and commercial heating.
Joule vs Daikin
Daikin is a Japanese climate control manufacturer whose Altherma 3 H HT range is built for higher flow temperatures, making it suited to boiler-replacement jobs with existing radiators. It is installed by Daikin-trained heating installers across the UK.
Joule vs Gledhill
Gledhill is a UK cylinder maker whose Stainless Lite Plus range spans 90 to 400 litres, carrying a 25 year cylinder guarantee. Its corrugated coil design is built for faster reheat when paired with a boiler or heat pump.
Joule vs Glow-worm
Glow-worm has made gas boilers in Belper, Derbyshire since 1934 and is part of the same group as Vaillant. Its Energy and Ultimate ranges are a common budget-to-mid-price choice for replacement combis.
UK companies hiring and selling Joule
No listed company has told us they carry Joule yet.
That does not mean nobody near you does - most trades and handymen firms carry several makes and list none of them. Start with the companies covering your area:
Browse trades and handymen companiesOther makes
GetBrent is an independent directory of UK hire and sales companies. We are not a Joule dealer and have no affiliation with, or endorsement from, Joule. The Joule name and model names are trademarks of their owner, used here only to identify the products they refer to. Specifications vary by model year and market - always confirm weights, dimensions and towing limits with the supplier before hiring or buying.