Showing Posts From
Btu
Heat Load & Cooling Load Calculation: How It Works
How an HVAC load calculation works — the heat-loss formula Q = U × A × ΔT, the sensible and latent parts of a cooling load, a worked residential example, and how to convert load to tonnage.
What Size Mini Split Do I Need? (Sizing Chart)
How to size a ductless mini split: a BTU-by-room-size chart, single-zone vs multi-zone sizing, why oversizing wrecks an inverter, and the adjustments that change the number.
BTU per Square Foot for Air Conditioning: The Chart and the Math
How many BTU per square foot you need for cooling, with a room-size chart, the climate adjustments that change the number, and why 20 BTU/sq ft is only a starting point.
How Many BTU Do I Need? AC Sizing for Every Room and Home
The right BTU for any room or home — the 20 BTU rule, adjustments for climate, ceiling height, sun, and insulation. Includes a quick-reference size table and worked examples.
Furnace Sizing Guide: What Size Furnace for My House?
Find the right furnace BTU for your home by climate zone and insulation with AFUE adjustment, worked examples, and why oversizing is the most common mistake.