Design tools

Will it fit? Cylinder space checker

For installers and homeowners

Measure the cupboard, answer two questions and see every World Heat cylinder that fits, with the spare millimetres on each side, and the ones that nearly do.

Which cylinder for this heat pump?

For heat pump installers and homeowners

Bedrooms, bathrooms and the heat pump (make and model, or its output in kW): see the World Heat cylinder to fit, a size either side, the hot water demand and storage behind it, and whether the coil suits the heat pump.

Replace an existing cylinder

For installers, merchants and homeowners

Enter the capacity, height, diameter and type of the cylinder that's there now and see the World Heat cylinder to replace it with, what's different and whether it's a straight swap.

Find a cylinder

For homeowners and installers

Three questions, the heat source, the size of home and the space you have, and the domestic cylinders that suit.

Pre-plumbed heat pump cylinder selector

For heat pump installers

Heat pump make and model, cylinder size, space and buffer: the pre-plumbed package to suit, confirmed by our team.

Domestic cylinder quick reference

For installers, merchants and specifiers

Every domestic cylinder's capacity, height, diameter and heat loss in one table, to filter and print.

Hot water storage sizing

For installers, specifiers and M&E consultants

Storage volume and reheat time together, from a 24-hour draw-off profile and the heating duty you have, for homes and for hotels, care homes, gyms, student accommodation, schools, offices, restaurants and factories (sized on their peak hour). Vary the duty to see the trade-off: less duty, more volume.

Cylinder heat loss

For specifiers and installers

Standing heat loss of a World Heat cylinder, per day, in watts and per year, from the declared figures.

Worked out from each cylinder’s declared heat loss figures.

Insulation savings: what would a new cylinder save?

For building managers, specifiers and procurement

Enter the size of an existing commercial vessel, its insulation and what heats it, and see the pounds a year a World Heat polyurethane foam insulated cylinder would save in standing heat loss.

Add your logo to a spec sheet

For installers and merchants

Choose a World Heat product and your company logo, and download our spec sheet with your logo added at the foot of the front page, ready to send to your customer. Your logo stays on your device.