Insulation savings: what would a new cylinder save?
Enter the size of your existing vessel, its insulation and what heats it, and see what it costs a year in standing heat loss against a World Heat cylinder insulated with polyurethane foam.
World Heat Cylinders · 0161 343 8610 · sales@whcylinders.co.uk
Insulation savings: what would a new cylinder save?
Your existing vessel
- Capacity of the existing vessel
- —
- Existing insulation
- —
- Heated by
- —
- This result
- https://worldheat.co.uk/tools/insulation-savings/
The figures we use
- Electricity
- 26.32p
- per kWh
- Gas
- 7.97p
- per kWh
- Stored
- 65 °C
- water
- Plant room
- 20 °C
- air
Unit prices are the Ofgem energy price cap (opens in a new tab) average unit rates (England, Scotland and Wales, Direct Debit) from 1 October 2026. Rock wool 0.040 W/mK, polyurethane foam 0.022 W/mK. Gas boiler 85%, direct electric 100%, heat pump seasonal CoP 2.5. Every assumption is listed under the result.
Your annual saving
Enter the capacity and answer both questions to see what a World Heat polyurethane-insulated cylinder would save a year.
The ranges this tool recommends from: Storage Calorifiers/Cylinders and Cylinder insulation.
Rather talk it through? Our technical sales team sizes cylinders every day: 0161 343 8610. See all our design tools.
Help choosing and specifying