Why size matters
A radiator's output drops as its water temperature falls. Heat pumps are most efficient producing lower-temperature water, so a radiator that heats a room comfortably on a gas boiler may struggle with a heat pump.
Not every radiator needs changing
A room-by-room heat-loss calculation shows which radiators are big enough already. Many homes only need a few upgraded, often in rooms with large windows or several outside walls.
- Double-panel, double-convector radiators give more output
- Wider or taller radiators add surface area
- Underfloor heating suits low temperatures well
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A benefit for boilers too
Larger radiators can also help a condensing gas boiler, letting it run at a lower flow temperature while still heating the home.
