Dimplex Heat Calculator

Heat Calculator

Estimate the heating capacity required for a room. Enter your room size, ceiling height, and insulation level. Results show watts and BTU/hr.

Dimplex

Room Details

Units

Tip: Choose Imperial for ft/in, Metric for m.

Design Temperature Difference (ΔT)

Choose a typical indoor–outdoor difference for winter sizing.

Length (ft)

Width (ft)

Ceiling Height (ft)

Length (m)

Width (m)

Ceiling Height (m)

Insulation / Room Exposure

Poor Average Good

Rule-of-thumb watts per square foot: Poor ≈ 12 W/sqft, Average ≈ 10 W/sqft, Good ≈ 8 W/sqft. Calculator also scales for ceiling height.

Exterior Walls

More exterior walls → more heat loss.

Window Area (% of wall area)

Higher window ratios increase heat requirement.

Air Leakage

Drafty spaces need more capacity.

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Based on room area, height, insulation, exposure, and ΔT.

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1 W = 3.412 BTU/hr.

Enter room details and click Calculate.

This tool provides a quick planning estimate only. For final sizing and product selection, consult your local codes and a qualified professional.