outdoor wood furnace pristine 7400e

The Next Generation of Outdoor Wood Furnace

Presenting Crown Royal Stoves, Pristine Gasification Series

Outdoor Wood Furnace

Pushing the Limits of What is Possible

Energy efficient, using readily available, renewable resources, makes Crown Royal Stoves, Outdoor Wood Furnaces, the number one choice for many consumers. Also known as outdoor boilers, stoves, or hydronic heaters, our units are one of the least expensive ways to heat in the winter months.

Depending on the furnace model you choose, you’ll be able to burn wood, coal, corn, wood chips, wood pellets, & more. Our indoor / outdoor furnaces are non pressurized systems, designed to be located virtually next to your fuel storage, keeping the mess outside. For the best corrosion resistance and heat transfer possible, all of our boiler’s fireboxes and outer drums are constructed from Domestic 409 Titanium Enhanced Stainless Steel.

Each indoor / outdoor furnace has been designed, and throughly tested, through years of research & development, to consume 30%-50% less fuel than the competition. Almost any existing heating system on the market can be converted to heat with Crown Royal Stoves, Outdoor Wood Furnaces. Heating applications include Residential Homes, Pool / Hot Tubs, Domestic Hot Water, Radiant In-Floor Heating, Commercial Buildings, Greenhouses, Garages & Workshops, Barns & Agricultural Buildings.

Cleaner, Safer Outdoor Furnaces for Your Home

Take it from us, We Know How to Heat!

Provide your family with the increased convenience and safety that come with an outdoor wood furnace. Along with enjoying outstanding energy efficiency and lower heating costs, Crown Royal Stoves indoor / outdoor furnaces will allow you to benefit from:

  • no mess or odor in the house from heating fuels
  • no carbon monoxide caused by natural gas
  • no fire hazard from an indoor furnace / boiler system

Modern Outdoor Wood Furnace

Rigidly Tested for Efficiency & Reliability

Located in International Falls, Minnesota, “The Icebox of the Nation”, where temperatures plummet below -40° during the winter months, Crown Royal Stoves outdoor wood furnaces are built at Greentech Manufacturing Inc. and have been rigidly tested to push the limits of what is possible. This allows us to produce the most efficient & reliable indoor / outdoor furnaces on the market, backed by our industry leading 20 Year Limited Warranty.


  • I got this wood stove about 5 years ago, and it has saved me a ton of money! I cut my own wood from my backyard and around the area that I live. This equipment is a much better choice than propane for my type of environment and lifestyle. I had grown up using propane, and had even spent a winter using only our fireplace in the basement, but it wasn’t going to cut it. So, I had a local company install a Crown Royal Wood Furnace to heat my house. Luckily, once propane prices rose astronomically we had already had it installed and avoided the financial stress. I would highly recommend this equipment to anyone. It has done wonders for us. We are saving money, “living off the land”, and our house is sitting comfortably.

    Luke Dunagan
    LeCenter, MN
  • I received my stove last week. It is now up and running. I am in total love. I stay cold due to medications. I can say, not any more. The people were wonderful to work with and talked us through any issue with a solution at the end of the conversation. The friend who helped install the stove has a different brand, older stove, after seeing how well this stove is made, he may be purchasing one (outdoor wood furnace) soon. So awesome!!

    J. Aycock
    North Carolina
  • I am very happy with my stove. Recently purchased a RS7300 coal indoor boiler (indoor furnace). Installed in November after owning 3 Aquatherms in the last 20 years. I now finally own an exceptional boiler. Easy to fire controls work well love the ash pan. I now can burn coal and wood. Average refill time every 12 hours. Very little smoke when firing. Stove has burned cleaner than any Aquatherm I have ever owned.

    M. Dionne

The Greener Way to Heat

Providing an Environmentally Responsible Alternative

We know that protecting the environment to safeguard and create a healthier planet for your family’s future is important to you. It’s important to us too.

That’s why Crown Royal Stoves, Outdoor Wood Furnaces, Pristine Gasification Series, has been designed to achieve the highest efficiency ratings possible, dramatically reduce emissions with the aid of an advanced air delivery system, reducing your carbon footprint and exceeding EPA standards.

A number of our outdoor furnace models are multi-fuel enabled, designed to burn a variety of renewable resources, that are readily available, allowing you to heat in a sustainable, energy efficient manner.

Domestic 409 Titanium Enhanced Stainless Steel

The Superior Choice for Indoor / Outdoor Wood Furnaces

Not all 409 Stainless Steel is created equal. Imported stainless steel has lower quality control standards causing a variety of problems in outdoor wood furnaces. The firebox and water jacket are the most important design features of any boiler system which is why all Crown Royal Stoves are manufactured with Domestic 409 Titanium Enhanced Stainless Steel. Our Domestic 409 Stainless Steel is 100% produced in USA Mills, ensuring premium quality.

Features & benefits

Experience the Crown Royal Difference

  • 409 Titanium Enhanced Stainless Steel
  • Triple Pass Water Filled Heat Exchanger *
  • Secondary Combustion*
  • Stainless Steel Heat Transfer Tubes
  • Stainless Steel Turbulators*
  • Easy Heat Exchanger Cleaning*
  • Fan Forced Draft
  • Smoke By-Pass *
  • Class A Insulated Chimney
  • 20 Year Limited Warranty
  • Roller Latch Door System*
  • Non-Stick Door Gasket
  • Insulated – Walls R30, Roof R30
  • Shaker Grate System with Removable Ash Pan *
  • Firebrick Refractory *
  • Ash Clean Out Doors
  • Easy to Read Backlit Display
  • Water Level Indicator
  • No Mess in the House
  • Works with Any Existing System
  • No Carbon Monoxide Caused by Gas Fumes
  • Large Firebox & Loading Door
  • Cost Effective Heat Source
  • Multiple 1-1/4″ Supply & Return Connections
  • Easily Removable Rear Access Door to Plumbing Connections
  • Light for Night Loading
  • Manufactured with Domestic Stainless Steel

* available on select indoor / outdoor furnace models only

made in the usa

Made in the USA

Pushing the Limits of What is Possible

At Greentech Manufacturing we work hard to deliver the highest quality, longest lasting, easiest to maintain and operate outdoor wood furnaces on the market. Each indoor / outdoor boiler is manufactured here in the USA and is developed through a rigorous research & development program, along with extensive testing, then backed by our industry leading 20 Year Limited Warranty.