Saturday, December 16, 2017

Frequently Asked Questions

Things You Should Know

  • How does the outdoor furnace work?

    How The Furnace Works

    • The firebox is surrounded by water.
    • That hot water is pumped (by a small pump located either on your furnace or in your house) through a pipe loop to the heat exchanger in front of your blower fan.
    • The blower fan blows the radiated heat from the hot water into your duct system, into your home for clean, non-dry, even, comfortable heat.
    • The "heat-reduced" water returns to your furnace, is re-mixed with the "hot" water, and continues the circle, providing you with consistent, clean, efficient heat that won't dry out you, or your home!
    • You can utilize your existing blower, duct work, and house thermostat!
  • What size furnace do I need?
    • BTU usage is the critical factor.
    • Example: If you are using (1) 20"x20" coil, that is 140,000 BTU + Domestic Hot Water Heat Exchanger that is 80,000 BTU, then you need a 220,000 BTU furnace
    • Don't under-size yourself. Better to have a little extra than too small.
    • Talk to your dealer, or our factory, and do an estimate on your BTU usage before you order.
  • Can I heat my hot water with this system?

    Your furnace is capable of heating your hot water for your home. We suggest one of these two methods.

    • Order your furnace with a copper coil on the inside to which you hook your hot water line. 
    • Install a separate heat exchanger near your hot water heater in your house.
  • Are there safety issues concerning the door and feeding the fire?

    Opening Your Furnace Door

    • Your furnace is equipped a double latch safety system and 18" handle. When opening the door the latches will "catch" before completely opening.
    • If you burn only regular wood, you should never have any "blow back" when you open the door.
    • It is unlikely in the Earth Furnace to ever have "blow back"... but it is always wise and prudent on any type of furnace to be aware of any potential and use reasonable care when opening.
    • Always keep your facial area away from or close to the door area. That fire is hot! Sometimes a rush of air on a simmering furnace can cause pretty quick combustion. Always use caution.
  • What can I burn in my outdoor furnace?

    Only Burn Approved Materials

    Caution! Never burn un-approved materials.
    • First, it negates your warranty.
    • Second, there could be substances that could cause combustion, or otherwise damage to persons, property, or the furnace.
  • What has to be done to install my furnace?

    Your new furnace arrives completely wired with plug-in, air bleed valve mounted and thermostat set. We recommend your pump be mounted and wired (for an additional charge.)

    View Photo

    All you have is 4 connections to make!

    • 1. 1" Pex outgoing at bottom of pump.
    • 2. 1" Pex return port at bottom.
    • 3. 1/2" water source line (coupling).
    • 4. Electric to plug in box.
  • What exactly comes with my Earth Wood Furnace?
    • Digital Thermostat
    • Automatic damper
    • Water Filled Valve System
    • Exterior Light
    • Customized total packages available with heat exchanger, water pump, Pex line, and ball valves
  • How often do I feed the fire?

    Burn Time - Facts and Fiction

    • "Burn Time" is a term used to gauge the time your furnace will operate before re-loading it with wood.
    • Be very careful about deceptive "Burn Time" advertising!
    • The Facts: "Burn Time" is affected by several factors:
      • How many square feet are you heating?
      • Daily temperature variations and fluctuations.
      • Type of water system (Pex) you install.
      • Distance from the furnace to the home.
      • Incline of water flow.
      • Type of wood and amount of moisture in the wood you are burning.
      • Insulation quality and value of the house or building.
    • The Truth is... most furnaces, you will have 12-18 hours burn in average conditions, so figure on putting wood in morning and evening. If you have your furnace in a handy location like I do, I fill it before I get in my truck to leave and fill it when I get home before I go in for the evening. In severe cold and wind chill weather, you may need to fill before going to bed at night.
    • These are the facts and truth. The main thing is... make it handy. Enjoy your furnace. Save money! Keep your home cleaner and safer! Enjoy that consistent, even, steady comfort and warmth, and smile when you want to turn the thermostat up!

Maintaining Your Furnace

  • How long will my furnace last?

    The Earth Furnace is designed to last well beyond the purchasers life! We hope your grandchildren can use it. It comes with a 25 year warranty.

  • What can break down on my furnace?

    There is really not much that can go wrong with the furnace; fans, thermometer, pumps, light switch. But that's about all.

  • What is covered under the warranty?

    You have a factory warranty on thermostats, pumps, etc. Your warranty on everything from the connections to your house and buildings and in them is between you and your installation contractor.

  • What if the tank leaks?

    In the very rare occasion of a water leak, we will either send a repairman, or replace the furnace.

    Note: There can and will occasionally be water condensation in the door frame. This is from high moisture wood, or the furnace running at low temperature. It is not a leak!
  • What happens if it doesn't seem to work properly?

    If your furnace does not seem to be working satisfactorily... First visit with your installation contractor. Then, if it is not resolved, and you really believe the problem is with the furnace, call us or have your contractor call us and we'll help in every way we can.

  • What do I do regularly to maintain my furnace?

    Oil all door hinges frequently.

The Furnace Exterior

Specifications, Features & Prices

  • Prices

    No One Beats Earth QUALITY or PRICES!

    • Rancher Series...only $4,595.00
    • Woodsman Series...only $4,995.00
    • Mountain Man Series...only $5,595.00
  • Variety of Models

    Earth offers 7 models, 2 styles

    • Ash-Drop - 2 Door, models 360, 400, 500
    • Open System - 1 Door, models 305, 365, 405, 505

    Earth also manufactures a forced-air furnace.

  • The Firebox

    The Earth Cylinder Firebox is 1/2" Thick (not "almost" as some advertise). Most other companies use 1/4" thick. Earth is twice as thick!

  • The Water Tank

    The water tank is 10 gauge (1/8" thick.) Nothing is made light or cheap in an Earth Furnace.

  • The Doors

    The Earth Furnace has a 3 section full-bar hinge to prevent warping.

  • Weight-Mass-Muscle

    The weight of a furnace is the #1 issue you should compare. What do comparable BTU's weigh?


  • Do you offer financing?

    We are currently working with Access Equipment & Financing, LLC to provide our customers with financing opportunities. Click on the link below to find out all the different options available and to fill out a credit application.

    Click Here to Apply for Financing