- 50 gallons of storage is probably adequate for most households, but heating output is more critical than storage capacity. The heating output of the unit must be equal to the amount of heat that the building will lose under the coldest conditions. Manufacturers provide heating output information for each model. The Polaris water heater has an output between 95,000 and 194,000 BTUs/hour depending on the model you choose.
- Click here to read more about hot water heaters.
