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Verified record
Black Diamond Heating is a heating business. Ronald E. Overlock Sr holds Maine hvac license MS30005698, active on the state registry.
Specializes in
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1 change recorded — last scanned Nov 1, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from Black Diamond Heating. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,500 – $10,300
Typical HVAC project around $7,400
Seasonal home opening and closing4.7
Burst water tank fixed by noon4.5
Transparent pricing4.3
Stalling furnace repaired quickly2.6
