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Model H

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Model H

small in-wall hydronic heater

King’s H Series small hydronic heater uses the energy from a building’s hot water source to offer efficient, whisper quiet operation and the ability to reduce utility bills with individual thermostat room control. By installing hydronic systems in every room, you can easily heat only the areas in use and conserve energy. Designed to fit neatly between standard wall studs, this in-wall heater provides out of the way positioning ideal for use in bedrooms, bathrooms, and laundry rooms. Provides 1,200 to 10,500 Btu heat output.

  • In-wall, Fan-Driven, Zone-Controlled Heat
  • Heat Only The Rooms Which Need It, Borrowing Energy From What’s Already There: The Hot Water Heater.
  • Compatible With Typical Hot Potable Water Sources
  • Tangential Blowers For Whisper Quiet Operation
  • Fast Coil Heating For Heat Transfer
  • 1/2” Trade Size Copper Tubes
  • Flow-Through Design
  • 4 or 8 Aluminum fins per inch
  • Permanently Lubricated Motor
  • Hi / Off / Lo Fan Switch
  • Aqua Stat Included
  • For Use With HW Series Thermostats
  • ETL Certified for USA and Canada
  • Proudly Made in the USA with U.S. & Global Materials
  • 2-year limited warranty

Borrow Energy From The Hot Water Heater

Hydronic heaters use hot water from home’s hot water tank and gently recirculates heat throughout the room. Heat only the rooms which need it, borrowing energy from what’s already here: the hot water heater.

Now That’s Smart!

Quiet, Cost-Saving Zone Control

King’s hydronic system offers cost-saving zone control, heat source sharing, near silent operation, quality construction, and easy installation.

Available Models

Ordering Information

MODELFINS PER INCHFT. OF WATER PRESSURE DROP @ 2 GPMBtu@2GPM120°F 48°C140°F* 60°C160°F* 71°C180°F 82°C200°F 93°C MAX.AMPSRPMCFMPurchase
H412 2/3-AS/FS-GW40.36High Speed180025003600350041000.54200080Buy Now
H412 3/4-AS/FS-GW80.36High Speed220031004000480061000.54200080Buy Now
H612 4/5-AS/FS-GW40.54High Speed360047005800710085000.482550120Buy Now
H612 6/8-AS/FS-GW80.54High Speed4100600076009100105000.482500120Buy Now
* most common water temperature range
** for low speed ratings refer to catalog page

Replacement Accessories

ADD SUFFIXUPCDESCRIPTIONWT. (lbs.)
HS GRILL 3/420860HS ACCESSORY H412 GRILL WHITE2.2
HS GRILL 4/520935HS ACCESSORY H612 GRILL WHITE2.5

Engineering Specs

Contractor shall supply and install H Series hydronic fan heaters manufactured by King Electrical Mfg. Co., Seattle, Washington.

Motor: 2 speed shaded pole impedance protected. Permanently lubricated. Bronze bearings.

Blower: Tangential blower to provide 50 or 120 CFM of air. Quiet operation of less than 53 dB A weighted scale at high speed. Easily removed for service. Bronze, not plastic, bearings.

Coils: 1/2″ ID Copper tubes with Aluminum fins of no more than 8 fins per inch for free flow of air and maximum circulation of air and water. Tested at 300 PSI for leaks. Copper tube used in coil is Alloy 122 made to ASTM B-75 specifications. For potable water use.

Grill: 20 gauge mild Steel, louvered with Nickel-plated grill screws. Powder-coated in white.

Wall Can: 20 gauge mild Steel, electro-galvanized to resist corrosion. 1/2″ knockout in bottom of can and QuickSetTM bend out mounting tabs for fast installation.

Fan Switch: 3 position fan switch High / Off / Low. Rated at 10 Amps with wire leads and insulated 1⁄4″ quick connects.

Aqua Stat: Ensures the water temperature is over 115°F before the fan turns ON

Terminal Board: All electrical connections will terminate at a phenolic terminal board with 1⁄4″ male brass blades for easy wiring.

Water Connections: 1/2″ ID bare Copper tubes de-burred. Tested at 300 PSI for leaks. Clean out tubes for water connection.

Approvals: ETL (3131491PRT-001). All King heaters are tested to UL 1995 Standards. Approved for USA and Canada. CSA/C22.2.