Room 1
Required output @ DT50
—
Design room temp 21°C · System ΔT 26.5 K · Output factor 0.430 · BOE correction 0.96
Heat Loss Hub
Radiator Output Calculator
Heat pumps run at lower flow temperatures than the DT50 rating printed on a radiator datasheet. Enter your flow temperature and room heat losses to find the DT50 output each radiator must be rated at.
Design Settings
Mean water temp (ΔT 5K)
47.5 °C
Summary
| Room | Type | Heat loss (W) | ΔT (K) | Factor | Required @ DT50 (W) | Required @ DT50 (BTU/hr) |
|---|---|---|---|---|---|---|
| Room 1 | Living area | — | 26.5 | 0.430 | — | — |
| Total | 0 W | 0 W | 0 BTU/hr | |||
Method: MWT = flow − 2.5K (5K ΔT). Radiator ΔT = MWT − room temp. Output factor = (ΔT/50)^1.3 to EN442. Required DT50 output = heat loss ÷ factor ÷ 0.96 for bottom-opposite-end pipework, rounded up. BTU/hr = W × 3.412.