
Cylinders for installers
The sizes you fit every week — from stock or built to order, with the unvented kit included and a technical team that picks up the phone.
For installers & heating engineers
Why installers choose World Heat Cylinders
Lead times
Lead times vary by product – call 0161 343 8610 for today’s lead time on your product.
Unvented kit included
Our unvented cylinders come with the kit: inlet control group, expansion vessel, T&P valve and tundish.
Find out moreGuarantee
25 year guarantee on stainless steel unvented cylinders up to 300 litres, subject to annual servicing. Register it online after the install.
Find out moreMade for awkward spaces
475 mm slimline, 400 mm ultra slim and horizontal cylinders for cupboards, lofts and eaves.
Find out moreHeat pump jobs sorted
Climacyl cylinders with 2–3 m² coils sized for heat pump flow, and pre-plumbed packages for LG, Mitsubishi Ecodan and Samsung.
Find out moreCalorifiers built to your duty
Capacity, recovery, primary heat source (LTHW, MTHW, HTHW or steam) and dimensions to suit the plant room, with a fully detailed drawing for each order.
Find out moreHelp from people who build them
Sizing, like-for-like replacements and one-off builds — talk to our technical sales team.
Find out more
Products installers fit most
All productsUseful downloads & links
Domestic unvented cylinder installer manual (120–300 L) (opens in a new tab)
EcoTherm thermal store installation instructions (opens in a new tab)- Installation, operation & maintenance manuals
- Product datasheets
- Register a warranty
- Spare parts & components
- Find a stockist
- Replacing a discontinued cylinder range
Real engineers, direct lines
Talk to our technical team
Speak to the people who design and build your cylinder — not a call centre. We’ll help you size it, spec it and get it on site.
We also work with
Need a cylinder built to your specification?
From 10 litres to 10,000 litres, our Manchester team designs, manufactures and tests every vessel in-house. We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.We confirm and respond to every bespoke enquiry within 48 hours, and standard range enquiries immediately. If you need a price on a standard product, don’t hesitate to call and speak to one of our team on 0161 343 8610.












