For specifiers and consultants
Calorifiers, buffer vessels and cylinders designed to your duty and built to the standards you specify — with the drawings and documentation to back them up.
For M&E consultants & specifiers
Why specifiers & consultants choose World Heat Cylinders
Built to the standard you specify
BS 853 calorifiers, with PD 5500 and the Pressure Equipment Directive where they apply, under a BSI-audited ISO 9001:2015 quality system.
Find out moreDesigned to your duty
Capacity, recovery, primary heat source (LTHW, MTHW, HTHW or steam) and dimensions to suit the plant room. A fully detailed drawing is produced for each order.
Find out moreDocumentation for the O&M file
Nameplates show the hydraulic test date, maximum working pressure and test pressure. Letters of material conformity and material traceability are available on request.
Tested in-house
Our products are performance and heat loss tested in our own test facility in Manchester.
Low-carbon systems
Heat pump cylinders, buffer vessels and thermal stores for heat pump and renewable systems.
Find out moreHeat pump ready
Climacyl cylinders with 2–3 m² coils sized for heat pump flow, and pre-plumbed packages for LG, Mitsubishi Ecodan and Samsung.
Find out moreMade for tight spaces
475 mm slimline, 400 mm ultra slim and horizontal cylinders for cupboards, lofts and eaves.
Find out moreGuarantee
25 year guarantee on stainless steel unvented cylinders up to 300 litres, subject to annual servicing.
Find out more
Products we build to your specification
All products
Useful downloads & links
- Resources centre: manuals, certificates, drawings
- Installation, operation & maintenance manuals
Commercial cylinders & calorifiers brochure (opens in a new tab)- Manufacturing standards & compliance
- Accreditations: what our approvals cover
- Product datasheets
Domestic unvented cylinder installer manual (120–300 L) (opens in a new tab)- Project case studies
- Reducing our own carbon emissions: done and in progress
- Request a quote with your drawings
- Request a quote
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.