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Room-by-Room Heat Loss

Array-based room-by-room design heat loss (BS EN 12831 elemental method): per-room fabric + ventilation, whole-dwelling totals and an emitter-sizing handoff.

Dwelling

CIBSE Guide A Table 2.5 (99.6 % design-day)

°C
°C

For the emitter-sizing handoff (EN 442 reference 75)

°C

EN 442 reference 65

EN 442 characteristic exponent, 1.2–1.35

Rooms

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ensign.software · 28 October 2026The Ensign Toolbox