I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
Snowbird Environmental Systems Corp A/E 32C-45A 36K BTU / 3 Ton Heat Pump 208 Volt 50/60 HZ AC HVAC These units were to be used for HVAC training and have never been deployed. They currently cost $11,508.94 each and we have three units available, you could install all three for much less than the cost of one.
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