{"product_id":"mestek-hsa12511-horizontal-hydronic-steam-unit-heater","title":"Mestek hsa12511 Horizontal Hydronic Steam Unit Heater","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MESTEK hsa12511 is a horizontal hydronic and steam unit heater designed for forced-air space heating using hot water or steam as the heat source. Rated at 24.8 MBH at 200 degrees F, it delivers 580 CFM of airflow through a copper coil heat exchanger. The unit is powered by a 25-watt, 120-volt totally enclosed motor with a built-in thermal overload protector, making it suitable for demanding commercial and industrial environments. Connections are 1-1\/4 inch FPT on both inlet and outlet. The system is rated for a maximum working pressure of 150 psi and weighs 25 pounds.\u003c\/p\u003e\n\u003cp\u003eThis unit heater is suited for commercial and light industrial applications where hydronic or steam heating infrastructure is already in place. Typical installations include warehouses, garages, utility rooms, and workshops. The horizontal configuration allows ceiling or overhead mounting, directing conditioned air downward and outward into the occupied space. A licensed HVAC technician or pipefitter is the appropriate trade for installation and commissioning.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e24.8 MBH output rating at 200 degrees F water or steam supply temperature\u003c\/li\u003e\n  \u003cli\u003eCopper coil heat exchanger for efficient heat transfer and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e580 CFM airflow capacity for effective space heating coverage\u003c\/li\u003e\n  \u003cli\u003e25-watt, 120-volt totally enclosed motor with thermal overload protection\u003c\/li\u003e\n  \u003cli\u003e1-1\/4 inch FPT inlet and outlet connections for standard hydronic or steam piping\u003c\/li\u003e\n  \u003cli\u003e150 psi maximum working pressure rating for compatibility with steam systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-install unit heater for horizontal hydronic and steam heating systems operating at up to 150 psi.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or pipefitter in accordance with applicable local mechanical codes and IFGC or IPC guidelines as relevant. Shut off and depressurize the hydronic or steam system completely before making any pipe connections. Ensure all FPT fittings are sealed with appropriate thread sealant rated for steam service. Power to the unit must be disconnected at the circuit breaker before any electrical work is performed on the motor or controls.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeating Capacity\u003c\/strong\u003e: 24.8 MBH at 200 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAirflow\u003c\/strong\u003e: 580 CFM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 120 volts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor Power\u003c\/strong\u003e: 25 watts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotor Type\u003c\/strong\u003e: Totally Enclosed with Thermal Overload Protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Exchanger Material\u003c\/strong\u003e: Copper Coil\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 1-1\/4 inches FPT Inlet and Outlet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 25 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrientation\u003c\/strong\u003e: Horizontal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MESTEK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: hsa12511\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MESTEK","offers":[{"title":"Default Title","offer_id":51233886372146,"sku":"HSA12511","price":747.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307633244.jpg?v=1780111239","url":"https:\/\/voomisupply.com\/products\/mestek-hsa12511-horizontal-hydronic-steam-unit-heater","provider":"Voomi Supply","version":"1.0","type":"link"}