Q: What types of commercial water heaters are available?

Commercial water heaters include tank-type (storage) water heaters, tankless (on-demand) water heaters, heat pump water heaters, and indirect-fired water heaters. Selection depends on hot water demand, fuel type, available space, and energy efficiency requirements.

Q: What is the first-hour rating (FHR) for a water heater?

First-hour rating measures how many gallons of hot water a storage water heater can deliver in the first hour of use, starting with a full tank. It is used to size water heaters for peak demand applications.

Q: What is the difference between a direct-fired and indirect-fired water heater?

Direct-fired water heaters have their own burner or heating element. Indirect-fired water heaters use heat from a separate boiler or heat pump, circulated through a heat exchanger inside the water heater tank. Indirect units are more efficient when paired with a high-efficiency boiler.

Q: How do I size a commercial water heater?

Commercial water heater sizing requires calculating peak hourly demand (gallons per hour) and recovery rate. Contact us with your application details — building type, occupancy, fixture count, and desired recovery rate — for sourcing support.