Suited for rugged industrial applications in steam, hot water, glycol, or other fluid circulating heating systems, HUH2 Hydronic Unit Heater Series is designed for pressures and temperatures up to 400 psi and 500°F, respectively, in single-pass and multi-pass core configurations. Series includes 36 in. fan size model which integrates speed reducer instead of pulleys and fan belts. HUH2 heaters meet ASME requirements with National CRN to conform to Safety Codes Act.