Viessmann Vitocell 300-V Indirect Water Heater, 42 Gal - 7720348

A compact 42-gallon stainless steel indirect water heater for condos and homes with one or two bathrooms. It draws heat from a boiler through a single 11 sq. ft coil and carries an AHRI first hour rating of 223 GPH, all in a tank 25 in. across and 47 in. tall.

Rated at 180°F boiler supply, it delivers 189 GPH continuous and a 34-gallon first draw. The stainless tank and coil need no anode rod, and foamed-in-place PUR insulation under a Vitopearlwhite steel jacket limits standby loss to about 0.8°F per hour. With no burner or fan of its own, the tank runs silently and relies entirely on an external heat source.

Heating supply and return are 1 in. male NPT, while domestic hot and cold, recirculation and T&P ports are ¾ in. male NPT. Maximum working pressure is 150 psig for domestic water and 220 psig for the coil. Tilt height is 50 in., and the insulated tank weighs 126 lb dry.

Highlights

• 42-gallon (160 L) stainless steel tank sized for one to two bathrooms

• AHRI 223 GPH first hour, 189 GPH continuous at 180°F boiler supply

• 11 sq. ft stainless coil with 1.95 gal coil water content

• No anode rod to replace

• 25 in. diameter x 47 in. height for tight closets and mechanical rooms

Specifications