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The Hyprotherm, Front Loading, Residential Hydronic series is a front loading furnace with more water capacity and a larger firebox then any other furnace in its class. These coal only furnaces feature fireboxes that are 3/8” thick. The water jacket bottom is also 3/8” thick with the sides and top being 3/16”. All of these front loading furnaces come with large 24” x 24” fuel fill doors and removable ash pans to make ash removal simple. They have cast iron coal grates and each furnace is pre wired with only one connection to a power supply necessary, making them basically plug and play. Each comes with; lock down vault assembly door latch, two 1” supply and two 1” return nipples. Also includes a water level sight gauge and a digital thermostat to control the combustion blower.


  • Water Capacity; 350 gallon
  • Water Jacket Thickness Bottom; 3/8”
  • Water Jacket Thickness Sides and Top; 3/16”
  • Firebox Capacity; 41 cubic feet
  • Firebox Dimensions; 3/8” thick @ 69.5”L x 30”W x 34”H
  • Overall Dimensions: 108”L x 46”W x 87”H
  • Crated Dimensions: 120″L x 51″W x 95″H
  • Shipping Weight: 3,580 lbs
  • Fuel Door; 24” x 24”
  • Grate System; Shaker Grate From Flat Cast
  • Ash Cleanout: Removable Ash Pan
  • BTUs; 392,175 @ 180 degree
  • Heatable Area; 9,800 sq ft Approx

The Standard Insulation Package on our furnaces is:

Three inches of Knauf ET Blanket = R- 11.5 + One quarter inch Solar Guard = R- 11.6
Hyprotherm side wall standard insulation = R- 23.10

Two inches of Morgan Super Wool Blanket
Hyprotherm top or front standard insulation = R- 56.80

If you want the best insulated furnace in the industry, be sure to get our Hyprotherm Cold Weather Package for an additional $307.00.  This amazing package covers the entire furnace in Morgan Super Wool instead of Knauf ET side wall. The Cold Weather Package on our furnaces is:

Two inches of Morgan Super Wool Blanket = R- 56.80 + One quarter inch Solar Guard = R- 11.60
Hyprotherm side wall Cold Weather Package Insulation R- 68.40

Three inches of Morgan Super Wool Blanket
Hyprotherm top or front Cold Weather Package Insulation R- 88.23

You can actually put your hand under Morgan Super Wool, heat the other side of it with a blow torch and not burn your hands!  Don’t believe us? Find that video and more insulation information by going to the insulation page.

Yeah, you want the cold weather package.

Hydronic Installation Manual