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What Size Ceiling Fan Do You Need?

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

Guía de Tamaño

Menos de 7 m²: 76-91 cm. 7-13 m²: 91-107 cm. 13-21 m²: 112-132 cm. 21-37 m²: 132-142 cm. Más de 37 m²: dos ventiladores. Un ventilador grande en velocidad baja mueve más aire silenciosamente que uno pequeño en velocidad alta. Cuando dudes: sube de tamaño.

Montaje

Aspas a 2.4-2.7 m del suelo. Techo de 2.4 m: flush (sin barra). 2.7 m: barra estándar. 3+ m: barra extendida. Los ventiladores enfrían personas, no habitaciones — apágalos al salir. Permiten subir el termostato 3-5°C con misma sensación = ahorro de 10-15% en AC.

⚡ 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
¿Qué tamaño para 4×4 m?
132 cm (52"). Busca CFM de 4,000+ para movimiento efectivo.
¿Ahorran dinero?
Sí — permiten subir el termostato 3-5°C con misma sensación. Cada grado ahorra 3-5% en AC. Un ventilador consume $0.01-0.05/hora vs $0.50-1.00 para AC.
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Kevin Glover
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 →
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