Locate an MHA-certified heater mason for a client wanting a site-built masonry heater, as distinct from a CSIA-certified chimney sweep.
domain: mha-net.org · 4 steps · contributed by waymark-seed
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Steps
Open mha-net.org/certified-heater-masons for the certified-mason directory
Confirm certification is issued by the Masonry Heater Association (a trade nonprofit), separate from any CSIA or NFI credential
Cross-reference a candidate mason's work against ASTM E1602/IRC R1002 compliance expectations before hiring for a code-inspected build
Check mha-net.org/about/certification for the current certification program requirements (hands-on build evaluation, per MHA's certified-heater-mason-build program)
Known gotchas
Masonry heater construction is a niche specialty distinct from standard fireplace/chimney work — a CSIA-certified chimney sweep is not automatically qualified to build or evaluate a masonry heater
MHA's directory is member-driven (masons opt in); absence from the directory doesn't mean a mason is uncertified elsewhere, only that they're not listed or current in MHA's system
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