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Heat Controller Inc. manufacture dates


Inspectorjoe
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Tuesday (yeah, still working on the report) among the many HVAC systems in a trashed commercial building was a heat pump system and and an air conditioning system, both Chinese made by Hear Controller Inc.

I can't figure out how to get the manufacture dates from the serial numbers. My guess would be 2000 and 2002, but the systems were almost certainly installed at the same time, so that doesn't make much sense. Also, the serial numbers on the indoor units don't correspond with those on the outdoor units.

Any ideas?

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