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Typical Hardy
Installations
The Hardy
Design
How Does A Hardy Hydronic Heater Work?
The „Hardy‰ is comprised of an all stainless steel 304 firebox, smokestack, firebox door, and ash door which maintain
the heat while resisting rust and burnout. Due to the corrosive resistance of stainless steel, chemicals are not necessary
in the water tank. The different types of fuel are placed in the firebox, which may include cordwood, pellets, or coal
depending on the specific model. The firebox is surrounded by water. As the fuel burns, the heat or energy is
transferred through the firebox metal to the water in the surrounding water jacket. A typical Hardy contains
approximately 100 gallons of water. The amount of water in the water jacket is different depending on the unit size.
Hardy Heaters store less water than most of its competitors. That along with our stainless steel firebox allows The
Hardy greater heat transfer and quicker water heat recovery. An aquastat constantly monitors The Hardy's water
temperature and as it begins to lower the aquastat will power up the combustion blower and damper solenoid. The
forced air re-ignites the fire forcing the water temperature to rise. At approximately 180■ the aquastat powers down the
combustion blower and damper solenoid. This process seals the firebox while basically starving the fire and forcing it
to smolder and die down to coals. This process repeats itself as needed to keep The Hardy at a controlled temperature,
with no intervention on the homeowner's part. Most Hardy's have a 12 hour burn time per load. Although, each
installation is unique you may experience more or less burn time.
How Does The Hot Water Produced By The Hardy Heat My Home And Domestic Water?
The Hardy is designed to be installed 10' to 100' from the structure you plan to heat. A concrete pad is poured for The
Hardy to be installed on. Hot water is circulated through underground pex pipes to your home or shop. The
installation of your buried pipes is a very important step in the installation of your Hardy. The ditch needs to be below
your local frost line. An insulated, water tight chase pipe needs to surround your circulating Hardy pex pipes. This is
one of the most crucial steps of the installation process. If done incorrectly, heat loss during transport from The Hardy
to your home or shop will increase and cause more fuel consumption. Once the transport of hot water arrives at your
home or shop, a water to air heat exchanger coil or a water to water heat plate exchanger is used to heat your home or
domestic hot water
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Smoke Stack
26 Gauge Stainless Steel
Standard Furnace 3 Feet
Condenser Tank Top
26 Gauge Stainless Steel
Manufactured by:
Domestic Water Coil
Heat Exchanger
Outside Cover (Hull)
24 Gauge Stainless Steel
Fits over the Water Jacket
Fire Box
16 Gauge Stainless Steel
Hardy Manufacturing Co., Inc.
12345 Road 505
Philadelphia, MS 39350-3366
t'BY
Sales Information
1-800-5HARDY5 (542-7395)
www.hardyheater.com
Casing Insulation
1½” Thick Fiberglass
Water Tank
16 Gauge Stainless Steel
Wood Loading Door
16 Gauge Stainless Steel
Cast Iron Grates
I-Beams
Ash Removal Door
16 Gauge Stainless Steel
© HARDY MANUFACTURING COMPANY, INC.