免费热增益计算器
计算建筑物的热增益量，用于制冷系统设计。
Total Heat Gain
50,812 BTU/hr
Total Heat Gain vs Floor Area
公式
## Cooling Load (Heat Gain) **Total = Envelope Gain + People Gain + Appliance Gain** Envelope gain uses a factor of 20 to 40 BTU per sq ft depending on climate and insulation. Each person adds about 600 BTU/hr. Appliances convert at 3.412 BTU per watt. One ton of cooling = 12,000 BTU/hr.
计算示例
1,500 sq ft, 30 BTU/sqft factor, 4 people, 1000W appliances.
- 01Envelope = 1500 x 30 = 45,000 BTU/hr
- 02People = 4 x 600 = 2,400 BTU/hr
- 03Appliances = 1000 x 3.412 = 3,412 BTU/hr
- 04Total = 50,812 BTU/hr = 4.2 tons
常见问题
What BTU per sqft factor should I use?
Hot/sunny climate: 30-40. Moderate climate: 20-30. Cool climate with good insulation: 15-25. South-facing rooms with large windows use higher values.
How much heat does a person generate?
A sedentary person generates about 400 BTU/hr sensible and 200 BTU/hr latent (moisture). Active occupants generate more. The 600 BTU/hr figure is a common combined estimate.
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