About Us

Our dedication and commitment is to provide customers with quality American made products. Striving to succeed in a competitive market at times can be very challenging. Even more frustration is finding people you trust to provide you with the service you need. Greentech Manufacturing strives to provide you with a full service facility which makes us different from others. There are many advantages for offering a full service facility to customers. Product delivered on time every time. No more waiting for multiple deadlines from multiple shops. Quality control is maintained from start to finish giving you the end result you are looking for. We are confident that with our design team, skilled programmers, engineers and talented production line every job will be treated with the most detail as possible. Large or small, simple or complex choose in confidence, Greentech Manufacturing Inc.


Greentech Manufacturing Inc. is a family owned and operated business, based out of International Falls, Minnesota, which is known as “the icebox of the nation.” Greentech manufactures one of the industry leading outdoor furnaces known as “Crown Royal Stoves”. Manufactured with quality workmanship and skilled labor, confident in our product we stand behind our stoves with a 20 year warranty. To complement our stoves, Greentech also manufactures a full line of hydronic unit heaters and air handlers called Precision Metal Products.


Offering you a full service facility we expanded in 2008 to over 40,000 Sq. Ft. this ensures us the room to grow and accommodate any job large or small.

Manufacturing – 20,000 SQ FT
Assembly/Supply Area – 10,000 SQ FT
Storage – 3,000 SQ FT
Shipping/Receiving Area – 3,000 SQ FT
Office Area – 5,000 SQ FT
Showroom/Front Office – 5,000 SQ FT


We understand that to manufacture quality products it comes down to investing in talented personal. We offer you highly skilled machinists and fabricators. Their attention to detail will ensure quality, defective free made to spec product. Our engineers and design team are equipped with the latest technology and offer you services from drawing to redesign for the most cost effective solutions.

Visit our Products


Crown Royal Stove 
Outdoor Wood Furnaces

  • Four models ranging from 165,500 to 500,000 Btu's with heating capacities of 2,000 to 20,000 sq. ft. Constructed of 10 Gauge 409 AL titanium enhanced stainless steel; for the best corrosion resistance and heat transfer possible.

Precision Metal - Unit Heaters & Air Handlers

  • Built for quality and performance, our Precision Metal line is manufactured with heavier gauge construction and equipped with reliable components.