What BTU for a 4x4 m room?

16 m²: 12,000 BTU for a normal room (16–20 m²), and 12,000 BTU for a sunny room (14–18 m²).

Why not use 700–800 BTU per m²?

We found no official source that sets that multiplier, so we use EGAT’s table directly and show the area range for each size so you can check.

What BTU for this room, per EGAT’s table

Verified + our stated conventionLast verified 25 September 2026

Room size

Room width

Room length

Sun exposure

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EGAT publishes a table, not a formula, so we do not use BTU-per-m² multipliers from other websites
When several sizes fit, we recommend the smallest to save energy and list the others
When the area falls between rows, we recommend the next size up so the unit is not too small

Internal reference: reference/10_btu.md

Results support decisions. For tax, legal, financial or construction matters, please check with a professional.