Jump to main content or area navigation.

Contact Us

Burn Wise

Consumers -
Choosing Appliances -
Choosing the Right Fireplace -
Understanding the White Tag

Burn Wise Logo

This white tag identifies wood-burning fireplaces that meet EPA’s Phase 2 emissions levels for the voluntary program. Models that carry this tag have been tested by an EPA-accredited laboratory and are cleaner than other models.

The following are definitions for specific parts of the hang tag to help you as the consumer, better understand how your model was rated. To view the definitions, click on or place your mouse on the red number directly on the hang tag graphic.

image of a hang tag "This Model" Designation - shows the pollution emission level (measured in grams/kilogram of wood burned) for this particular model. This number resulted from the emissions test used to compare the fireplace with the EPA qualifying emissions level. 5.1 EPA Phase 2 Emissions Level - the fireplace must meet this level to qualify for the EPA Phase 1 voluntary program. This level is calculated in grams/kilogram of wood burned. Phase 2 - is the initial step of EPA's phased program to provide better choices to consumers of fireplaces that are cleaner and more efficient than unqualified fireplaces. Grams/kg of Wood Burned - shows the amount of particle pollution (measured in grams) per unit of wood burned (measured in kilograms). Accredited Independent Laboratory - These testing labs are third parties that are (1) accredited by a nationally recognized accrediting body to perform testing under ASTM test methods E2558 and E2515 under ISO-IEC Standard 17025, or (2) accredited for wood stove certification testing under the residential wood heater NSPS [40 CFR Part 60, Subpart AAA]. An important criterion is that these labs are independent of the manufacturers. Also, this lab accreditation is determined by reviewing the lab’s performance, the capabilities of performing specific types of testing, and accurately and fully compiling test results. In addition, EPA will receive a Certificate of Conformity for each model by a certification body accredited by a nationally recognized accrediting body to perform certifications and inspections under ISO-IEC Guide 65, and ISO-IEC Standard 17020. A certification body would certify conformity with Program emission levels and perform other functions pertaining to certification (e.g., manufacturing facility inspections). Emissions Level - designated by EPA as a maximum of 5.1 grams/kilogram of wood burned. EPA established this number with input from various stakeholder groups such as industry manufacturers, EPA-accredited testing laboratories, state air quality agencies, the Northeast States for Coordinated Air Use Management (NESCAUM), and the Western States Air Resources Council (WESTAR). Grams/Hour/10,000 BTU Heat Output - shows the particle pollution per hour per every 10,000  BTU of heat output. This calculation takes into consideration varying sizes of hydronic heater units. In general, larger models typically emit more pollution but they also provide more heat output if the efficiency is the same. Although EPA's  primary interest is reducing emissions to protect public health, EPA is also  encouraging manufacturers to increase the efficiency of their hydronic heater which typically  reduce emissions for a given heat output. For comparison, many current hydronic heater are estimated to have combustion efficiencies of only 30-40 percent whereas most current EPA-certified wood stoves and wood pellet stoves have efficiencies of  67-80 percent.

number 1  "This Model" Designation - shows the pollution emission level (measured in grams/kilogram of wood burned) for this particular model. This number resulted from the emissions test used to compare the fireplace with the EPA qualifying emissions level.

Top of page

number 2  5.1 EPA Phase 2 Emissions Level - the fireplace must meet this level to qualify for the EPA Phase 2 voluntary program. This level is calculated in grams/kilogram of wood burned.

Top of page

number 3  Phase 2 - is the final step of EPA's phased program to provide better choices of fireplaces that are cleaner and more efficient than unqualified fireplaces.

Top of page

number 4  Grams/kg of Wood Burned -  shows the amount of particle pollution (measured in grams) per unit of wood burned (measured in kilograms).

Top of page

number 5  Accredited Independent Laboratory - These testing labs are third parties that are (1) accredited by a nationally recognized accrediting body to perform testing under ASTM test methods E2558 and E2515 under ISO-IEC Standard 17025, or (2) accredited for wood stove certification testing under the residential wood heater NSPS [40 CFR Part 60, Subpart AAA].   An important criterion is that these labs are independent of the manufacturers. Also, this lab accreditation is determined by reviewing the lab’s performance, the capabilities of performing specific types of testing, and accurately and fully compiling test results. In addition, EPA will receive a Certificate of Conformity for each model by a certification body accredited by a nationally recognized accrediting body to perform certifications and inspections under ISO-IEC Guide 65, and ISO-IEC Standard 17020.  A certification body would certify conformity with Program emission levels and perform other functions pertaining to certification (e.g., manufacturing facility inspections).

Top of page

number 6  Emissions Level - designated by EPA as a maximum of 5.1 grams/kilogram of wood burned. EPA established this number with input from various stakeholder groups such as industry manufacturers, EPA-accredited testing laboratories, state air quality agencies, the Northeast States for Coordinated Air Use Management (NESCAUM), and the Western States Air Resources Council (WESTAR).

Top of page

Jump to main content.