The 1988 New Source Performance Standards (NSPS) for residential wood heaters required manufacturers of wood stoves to certify that each model line of wood stoves offered for sale in the United States complied with the EPA particulate emissions guidelines in the Clean Air Act. As part of the certification process, each wood stove model line was required to undergo emissions testing in accordance with EPA Reference Method 28 and sampling methods 5G or 5H by an EPA-accredited laboratory. Only after successfully passing these tests could a wood stove be offered for sale in the United States.

• Appendix I - Removable Label and Owner's Manual (PDF)(12 pp, 355 K, About PDF)

Test Methods for 1988 Residential Wood Heater NSPS:

• Method 28 - Certification and Auditing of Wood Heaters (PDF)(46 pp, 102 K)
• Method 28A - Measurement of Air-to-Fuel Ratio and Minimum Achievable Burn Rates for Wood-Fired Appliances (PDF)(14 pp, 23 K)
• Method 5G - Determination of Particulate Matter Emissions from Wood Heaters (PDF)(35 pp, 197 K)
• Method 5H - Determination of Particulate Matter Emissions from Wood Heaters from a Stack Location (PDF)(31 pp, 319 K)