Additional InformationAHRI Certified|ANSI Z21.22|CAN 1-4.4|CSA Certified|cULus Listed|UL Listed
Marketing InformationAll units are certified at 300 psi test pressure and 150 psi working pressure. All potable water connections are 3/4 in NPT (1 in NPT on SS-120). Toxic chemicals, such as those used for boiler treatment, shall never be introduced into the potable water side. The potable side of this unit may never be connected to any existing heating system or components previously used with a non-potable water heating appliance. The heat exchanger side of the unit may be used in space heating applications.