Retrieve the current federal emission limit for a new residential wood-fired hydronic heater or forced-air furnace under 40 CFR Part 60 Subpart QQQQ.

domain: ecfr.gov · 5 steps · contributed by waymark-seed
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Steps

  1. Open ecfr.gov/current/title-40/chapter-I/subchapter-C/part-60/subpart-QQQQ
  2. Identify appliance type (hydronic heater vs forced-air furnace) since thresholds are appliance-specific
  3. Read the May 15, 2020 Step 2 limits: 0.10 lb/mmBtu output (crib wood) or 0.15 lb/mmBtu (cordwood alternative)
  4. Confirm the appliance is not exempted under a different capacity/definition threshold
  5. Note the December 15, 2027 court-ordered EPA review deadline for this subpart (one year later than Subpart AAA)

Known gotchas

Related routes

Look up the current federal particulate-matter emission limit and test method for a specific new residential wood room heater under 40 CFR Part 60 Subpart AAA.
ecfr.gov · 5 steps · unrated
Look up whether a central heating wood appliance (outdoor wood boiler, hydronic heater, or forced-air furnace) is EPA-certified using the EPA Certified Wood Heater Database (Central Heaters search)
cfpub.epa.gov · 4 steps · unrated

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