Aqua-Therm Outdoor Wood Boiler
- Stainless Steel Firebox.
- Closed System - NO rusting and NO water-water heat exchanger needed.
- Ash Auger - Easy cleaning, no need to shut the fire down to clean ashes.
- Limited Lifetime Warranty! Aqua-Therm customers are satisfied customers!
- Forced Air Draft - Burns any wood - wet, green, big or small - cleanly and efficiently.
- Minimal Water - only 48 - 76 gallons depending on the model selected. Faster recovery and easy to antifreeze.
- Air-Tight Firebox - No smolder. Cleaner, longer burns.
- Round Design - No corner welds to crack. We have been making them round for over 20 years!
Sheltered versus Unsheltered
Aqua-Therm Boilers are the only outdoor wood Boilers available either sheltered or unsheltered!

Unsheltered
Many Aqua-Therm owners prefer an unsheltered unit in their own building. Some of the advantages of an unsheltered unit are:
- You are out of the elements when loading the Boilers.
- Wood storage can be incorporated into the building, although the Aqua-Therm does not require dry wood to burn.
- Our unsheltered units are typically $1,200 - $1,300 less than our sheltered units and $3,000 - $4,000 less than the competitions sheltered stoves!

Sheltered
Our sheltered boilers are available in either white or dark green and allow for fast and easy installation. Other advantages of a sheltered Boiler include:
- Units come completely plumbed, insulated and wired to code. Simply connect the tubing and electric supply and you are ready to go.
- No additional chimney to run. Sheltered units have their own chimney, unlike unsheltered units.
- Can be put anywhere. You are not restricted by building location or size.
- Convenient doors. A large outer loading door keeps the unit clean and protected and a full-size rear access door allows full access to all components.
Boiler Models & Specifications
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MODEL 145 Normally used for homes under 2000 square feet (with constant circulation). |
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MODEL 275 Used for homes between 2000 and 5000 square feet. |
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MODEL 345 Used for homes between 5000 and 10,000 square feet. |
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MODEL 405 A huge firebox for large heating needs such as shops or greenhouses. |
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SHELTERED MODELS All
Models
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Warranty
Uses For The Aqua-Therm
The Aqua-Therm Outdoor Wood Boiler is capable of supplying all your heating needs, from home heating, domestic water, garages & pole Barns, swimming pools, greenhouses, and much more.
Hot Water Baseboard or Radiator Heating
The closed system advantage of the Aqua-Therm lets you tie directly into your hot water heating system. Installation is quick and easy, and nothing has to change with your existing system. Your existing Boiler is still available as a backup for the Aqua-Therm.
Forced Hot Air Heating
Our forced air heating kit gives you a heat exchanger that easily installs into your existing plenum and an electrical relay that controls the fan on your existing furnace. Your existing furnace is still available as a backup for the Aqua-Therm.
Garage Unit Heaters
Radiant Heat
Radiant heating is a very popular type of heating because of its warm, even heat. The Aqua-Therm Boiler ties directly to your radiant system and is ideal for all radiant applications. For more information on radiant heating and our complete line of radiant products and tools.
Domestic Hot Water Heating
Whether you are using an indirect hot water heater or using one of our hot water conversion kits, the Aqua-Therm can supply all of your domestic hot water. Most households realize a monthly savings of $50 or more in energy costs. Our hot water conversion kit lets you use your existing gas, oil, or electric hot water heater as a storage tank with the water heated by the Aqua-Therm.
Pools & Spas
The Aqua-Therm Wood Boiler can be hooked to one of our Stainless Steel heat exchangers to supply endless, free hot water to your pool or spa. Whether you want to extend your pool season, enjoy a relaxing dip in the spa, or just give yourself a break from high heating costs, the Aqua-Therm is there to make it all possible.
Wood Boiler Installation
The Aqua-Therm outdoor Boiler can be installed by a contractor or by most homeowners with a working knowledge of plumbing and heating systems.
For customers who want to install the Aqua-Therm themselves, we provide free advice and a comprehensive installation guide to show you how to get the job done right. The basic steps in installing the Aqua-Therm outdoor wood Boiler include:
- Prepare suitable pad for sheltered Boiler or for unsheltered Boiler in your building.
- Place furnace on pad and mount fitting if using an unsheltered Boiler.
- Lay tubing and insulation in trench.
- Connect tubing and electrical power to Boiler.
- Connect tubing and electrical power to existing home furnace or boiler.
- Fill Boiler, light fire, start saving money!


