免费热水器选型计算器
根据家庭用水需求和BTU输入量选择合适的热水器，免费热水器计算器。
people
gal
degF
hr
Recommended Tank Size
80 gal
BTU Input Needed46,648 BTU/hr
Daily Hot Water Demand80 gal
Recommended Tank Size vs Number of Occupants
公式
## Water Heater Sizing **Daily Demand = Occupants x Gallons per Person** **BTU/hr = Demand x 8.33 x Temp Rise / Recovery Hours** The constant 8.33 is the weight of one gallon of water in pounds. Tank size is rounded up to the nearest standard 10-gallon increment.
计算示例
A household of 4 using 20 gallons each, 70 degF rise, 1-hour recovery.
- 01Daily demand = 4 x 20 = 80 gal
- 02Tank size = round up to 80 gal
- 03BTU = 80 x 8.33 x 70 / 1 = 46,648 BTU/hr
常见问题
What temperature rise should I use?
In most regions, incoming water is 50 to 60 degF and the target is 120 degF, giving a rise of 60 to 70 degF. Use 70 degF as a safe default.
Tank vs tankless - how does sizing differ?
Tankless heaters are sized by flow rate (GPM) and temperature rise. This calculator is for tank-style heaters where storage capacity is the key variable.
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