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What Size Ceiling Fan Do You Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate the right ceiling fan diameter and CFM for your room size. Avoid buying one that is too small.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Ceiling Fan Sizing Guide
Fan Height and Mount Type

Guide

Moins de 7 m² : 76-91 cm. 7-13 m² : 91-107 cm. 13-21 m² : 112-132 cm. Plus de 21 m² : 132-142 cm ou deux ventilateurs. Un grand à vitesse basse est plus silencieux qu'un petit à vitesse haute.

Économies

Permet de monter le thermostat de 3-5°C pour la même sensation. Un ventilateur consomme 0,01-0,05 €/h vs 0,50-1 €/h pour la clim. Économie de 10-15% sur la facture d'été.

⚡ CalcWolf Insight

The most energy-efficient cooling strategy: ceiling fan + thermostat raised 4°F. The fan costs 1/50th what the AC costs to run. A family using fans to raise their thermostat from 72°F to 76°F saves $200-400 per cooling season. Fans cool people, not rooms — turn them off when you leave.

Frequently asked questions

Quelle taille pour 16 m² ?▾

132 cm (52"). Recherchez 4 000+ CFM.

Ça économise vraiment ?▾

Oui — 10-15% sur la clim en permettant de monter le thermostat.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →