Got a 3 ton A/C package unit from a neighbor that was going to scrap it here at the shop. Had a 2.5 split system that my friend replaced at his house which was going to be installed until the neighbor showed up with the package unit. I traded the 2.5 ton system for the package so he didn't lose his scrap, then put a plug end on it that fit my welder extension cord - total hardware cost $0.00 (had a spare male 50amp plug from the broken plasma cutter).
Welded some wheels on the package unit rolled the door down on it, and put plywood on either side to block the heat. Prior to the A/C my shop would be 94-98f (65-100% humidity), today it's 83f and no humidity! That combined with the white reflective/insulated roof coating that was applied last month, concrete ceiling temps went from ~108f max down to 89f.
I was worried about the cost, so only used it a few days in a row on the last billing cycle so I could go back and look. Most days the shop consumes about $3 in electricity during the work week ($5 on heavy welding or air compressor usage days). I actually thought the A/C would drive the cost over $300/mo, but barely broke $100 this cycle. I am beside myself it's that cheap to run an A/C that has the thermostat wires tied together so it just runs all day.
Welded some wheels on the package unit rolled the door down on it, and put plywood on either side to block the heat. Prior to the A/C my shop would be 94-98f (65-100% humidity), today it's 83f and no humidity! That combined with the white reflective/insulated roof coating that was applied last month, concrete ceiling temps went from ~108f max down to 89f.
I was worried about the cost, so only used it a few days in a row on the last billing cycle so I could go back and look. Most days the shop consumes about $3 in electricity during the work week ($5 on heavy welding or air compressor usage days). I actually thought the A/C would drive the cost over $300/mo, but barely broke $100 this cycle. I am beside myself it's that cheap to run an A/C that has the thermostat wires tied together so it just runs all day.
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