Our 531 series is perfect for apartments, condominiums and townhouses with 1 shower.  When properly sized, they provide an endless supply of hot water and are designed to be more efficient than traditional tank-type water heaters.  These compact heaters will save space without compromising power. Built-in features include safety lock-out, freeze protection, and high elevation adjustment.  These units also offer several innovations:

Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp)

Standard burner - High performance single flame burner.

Fully modulating burner - Automatically adjusts burner level accordingly.

Turbo Flow - Up to 6.6 GPM @ 35 degree temperature rise (5.3 GPM @ 45 degree rise).

Direct ignition - No standby pilot light.

Thermal fuse - Automatic overheat protection system.

Resin coated PC board - Increases durability and protection from elements.

Automatic air regulator - Monitors internal temperature/maximizes burner efficiency.

*Energy Factor (EF) is a measurement of relative energy efficiency for a water heater; the higher the EF, the more energy efficient the water heater.