AC Size Calculator — Temperate Climate
Tonnage estimate tuned to a temperate climate (~20 m²/ton) with occupant & sun corrections.
Mild design days let you size lean; prioritize SEER over capacity.
Formula
AC Size Calculator — Temperate Climate is a free ac size temperate for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About AC Size Calculator — Temperate Climate
Tonnage estimate tuned to a temperate climate (~20 m²/ton) with occupant & sun corrections. The calculation implements tons = area/20 + 0.06/extra person + 0.12 if sunny exposure (ACCA Manual J climate-adjusted rules of thumb). Mild design days let you size lean; prioritize SEER over capacity.
How to use AC Size Calculator — Temperate Climate
- 1Enter Floor area in m².
- 2Enter Occupants above 2.
- 3Enter Strong afternoon sun? (1 = yes, 0 = no).
- 4Read Recommended tonnage, Capacity instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use AC Size Calculator — Temperate Climate?
- ✓Implements the standard formula — tons = area/20 + 0.06/extra person + 0.12 if sunny exposure
- ✓Reference cited on-page: ACCA Manual J climate-adjusted rules of thumb
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the AC Size Calculator — Temperate Climate use?+
It computes tons = area/20 + 0.06/extra person + 0.12 if sunny exposure, per ACCA Manual J climate-adjusted rules of thumb. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Mild design days let you size lean; prioritize SEER over capacity.
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the AC Size Calculator — Temperate Climate free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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