Online Form

Greentech Manufacturing, Inc. offers to the original owner from date of purchase a limited twenty (20) year warranty. To validate your warranty please complete this form. This form must be filled out completely, otherwise you cannot submit. Warranty Registrations that have been submitted correctly will get a confirmation page.

Purchaser must use Crown Royal Stove’s approved Control Chemical treatment and mail water samples to our third party testing facility within 30 days of purchase. Warranty is void if our chemical is not used and the boiler water is not tested at least annually. You will get notification of test results by email (if listed) or mail within 30 days. If you are not notified within 30 days you need to call us. If test results come back unsatisfactory, you are required to follow the instructions and retest within 30 days. If you add water to your system for any reason add ½ ounce of chemical per gallon of water and send a new sample of water to the testing laboratory. 





Thank you for making the choice to purchase your new Crown Royal Stove. We are certain that you will find great satisfaction with your stove’s ongoing reliability and performance.

Greentech Manufacturing, Inc. warrants this furnace, to the original owner, to be free of defects in material and workmanship for a period of twenty (20) years from the date of purchase.


One Year Warranty

  • On Electrical Components - Parts Only—aqua stats, thermostats, fans and pumps are guaranteed by the manufacturer for a period of one (1) year from the date of purchase. Parts will be replaced on an even exchange, excluding shipping charges and labor.
  • The loading & heat exchanger door, ash pan door gaskets, ash pan and ceramic moldings are warranted for a period of one (1) year from date of purchase.


Five Year Warranty

  • Shaker Grates - the cast iron rocker grates are warranted for five (5) years 100%. This warranty excludes any warping or deterioration from ash corrosion.


If there is a leak in the fire box, water jacket or heat exchanger on your Crown Royal Stove during the: 

  • First (1) year - Greentech Manufacturing, Inc. will replace the unit at no cost to the original owner. The owner is liable for the un-installation of the old unit and the installation of the replacement unit.
  • Two to five (2 - 5) years—If the unit is to be replaced the customer shall pay the difference between the original purchase price of the old unit and the new purchase price of the replacement unit, plus freight and installation.
  • Sixth (6) year— Greentech Manufacturing, Inc. will pay a percentage of the total cost of the fire box and outer drum. Our percentage paid is as follows: year 6 –70%, year 7 – 50%, years 8-9 – 30%, years 10-20 – 20%. After the twentieth (20) year, Greentech Manufacturing, Inc. will give 10% off the purchase of a new stove.


Not Warranted

  • Greentech Manufacturing, Inc. does not warranty parts damaged by freezing, overheating, pressurization, warping and/or use of unauthorized fuels or abuse. 
  • Greentech Manufacturing, Inc. is not responsible for the cost of plumbing, replacement of antifreeze, shipping, labor or any other cost other than the replacement of the part or furnace.
  • Greentech Manufacturing, Inc. is not liable for any damage or cost which may occur from or during the operation of the furnace, or damage incurred due to any heating system failure. These furnaces are not intended to be the only source of heat; therefore, it is recommended that a back-up system is in place to prevent damages caused by lack of heat.
  • No unauthorized adjustments or repairs will be covered by warranty.
  • Greentech Manufacturing, Inc. does not warrant exterior paint or finish, any damage caused by negligence and deterioration due to lack of proper ongoing maintenance, overheating, physical damage caused by abuse or freeze up, unauthorized work or modifications to the furnace, damage to the fire-box due to power surges or damage caused by burning unauthorized fuels.
  • Greentech Manufacturing, Inc. does not warrant the high temperature ceramic moldings.
  • Ash corrosion on the inside fire drum in not warranted. To prevent ash corrosion, rotating or raking ashes forward must be done as described in the manual. The Crown Royal Stove is designed to be the least susceptible to corrosion; therefore, most corrosion is covered under this warranty.


The chimney must be covered when the unit is not in use. It is mandatory that a chimney cap be installed before operation of the unit. If an onsite repair is made, the customer is responsible for the transportation costs and labor. If the furnace needs to be repaired at the factory, it is the responsibility of the consumer to pay all shipping charges to and from the factory. Greentech Manufacturing, Inc. specifically disavows any other representation, warranty, or liability related to the condition or use of this product. 

The purchaser assumes all responsibility for the care, maintenance and safe operation of the furnace including the monitoring and adding of an approved boiler treatment. All instructions must be followed in the operator’s manual, Control Chemical utilized and water samples tested annually and the warranty registration must be on file at Greentech Manufacturing, Inc. To qualify for warranty Greentech Manufacturing, Inc. always has the right to decide if the stove will be repaired or replaced. To validate this warranty, registration must be completed within thirty (30) days of purchase date, dealer’s invoice attached and mailed to:

Greentech Manufacturing, Inc. • P.O. Box 1237 • International Falls, MN 56649


Failure to use Control Chemical in your furnace and to send in annual water samples will void this Warranty - NO EXCEPTIONS!

This Warranty is subject to change. For updated Warranty Information contact Greentech Manufacturing Inc.

Last Updated : August / 2017