Wood Pellet Stove Ratings for Efficiency
When purchasing a wood pellet stove, you should ensure that it meets the Environmental Protection Agency Standards. You should also look for the Efficiency Range and Stove heat output given in BTU’s.
I have set some parameters for the selection of efficient wood pellet stoves.
These include the following:
1. Efficiency Range - should be above 70% efficient.
2. EPA Certified - must not produce more than 7.5 grams of smoke per hour; however most wood pellet stoves are exempt from this section of the regulations as their emissions are much lower than this figure.
3. Heat Output - should be in the range of 50,000 BTU’s/hr - 65000 BTU’s/hr capacity for a typical three-bedroom family home.
4. Automatic Control - essential for efficient combustion of the pellets and will help you to save from adjusting the pellets feed and air mixtures to suit temperature requirements.
5. Automatic Pellet Igniting - automatic ignition is also essential for convenience.
6. Automatic Safety Cut-out - this is mandatory by EPA regulations. It is a probe that is fitted to the flue that cuts out the boiler when overheated.
7. Stove Hopper Capacity - the hopper should be capable of containing enough pellets to operate the stove for 24 hours.
8. Tax Credits - ensure the stove qualifies for US tax credit; normally a pellet stove of over 70% efficiency qualifies for this.
From these parameters, I have produced the table below. (Please click on the image to enlarge the table).
From the above table, all three meet the required parameters, with the Extraflame Lucrezia having the highest wood pellet stove ratings for efficiency at 95%.