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  1. RACandH

    freezer efficiency

    Subcooling, Subcooling, Subcooling
  2. RACandH

    Walk-in Cold Storage Room

    Works great, and it's free too!! http://www.k-rp.com/calcrite/RTcalc1.htm
  3. RACandH

    Heating calculations on Chalet with Propane Stove

    Don't forget to have the propane burner de-rated for high altitude or you will face some serious combustion problems.
  4. RACandH

    Help with central air!!

    jagermeister 5 Sorry, maybe I didn't explain properly. The "listed" temperature rise is the furnace design operating parameters and is found on the nameplate. You will need to measure the actual rise with two thermometers. One in the supply and one in the return. The difference is the...
  5. RACandH

    Help with central air!!

    General rule of thumb is 400 cfm per ton. For residential you can usually run with slightly less than 400 cfm per ton. Gas furnace? Measure the temperature rise accross the furnace heat exchanger once running for 5 minutes & stablized. Observe the nameplate for the Btuh input. Find out the...
  6. RACandH

    Gas Distribution

    What code is most commonly used by Canadian Natural Gas Utility companies for the design, installation and maintenance of distribution systems up to, but not including the end users equipment? Thanks in advance.
  7. RACandH

    R22 Replacement

    http://www.suva.dupont.com/ R 407C but it's not a "drop-in." POE oil required.

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