CSW Model History

Cumberland Stove Works, which originated in Cumberland WI, began producing multi-fuel pellet stoves in 2005 with the MF3500 manual-ignite and the MF3600 auto-ignite stoves. In late 2006, updates and changes were made to these stoves as the firepot and fireplate were reconfigured to be easily removed. The auger housing was also changed from round to octagonal to improve the fuel flow. Thus, the MF3650 was born, and included the same control system as the original MF3500 and MF3600 stoves. That control system was improved in 2007 to a solid state control, which increased the feed rate to 45,000 BTU. Soon after, the MF3650 convection motor was redesigned to run slower and quieter with the same air flow. These updates gave way to the original MF3700 and MF3800 models. In 2009, Cumberland Stove works added a fuel gate kit and relocated the over limit switch to help improve the stove’s performance when using poor quality fuel. Those changes became part of the current MF3800.

Specifications MF3500 MF3650 MF3800
BTU Conversion Rate 99% 99% 99%
Overall Efficiency 82% 82% 82%
BTU/hour Input 35,000 btu/hr 35,000 btu/hr 45,000 btu/hr
Heating Capacity 2,200 sq ft 2,200 sq ft 2,200 sq ft
Fuel Storage Capacity 62 lbs 62 lbs 62 lbs
Feed Rate 4.8 lbs/hr max 4.8 lbs/hr max 5.2 lbs/hr max
Ignite System manual auto auto
Control Board mounted mounted removable
Accepts Remote Thermo. yes yes yes
Onboard Local Thermo. no no included
Flue Size 3 in 3 in 3 in
Width 22 in 22 in 22 in
Height 40 in 40 in 40 in
Depth 22 in 22 in 22 in
Shipping Weight 287 lbs 287 lbs 287 lbs