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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Heat pump refrigerant change to R-22 substitute
Is it a good or bad idea to change over to one of the new refrigerants
that claim lower head pressure, cooler air and substantially reduced electricity usage? |
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