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  • Users: mt31
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  1. mt31

    Residential furnace selection

    For a high quality split home comfort system, I would recommend that you look into the LENNOX line of systems. They have a 94% eff. natural gas fired furnace that you can match with a 15 SEER hsx15 CONDSER AND A ASPEN EVAP COIL AND PULL 16 SEER. The furnace is a two stage variable speed unit...
  2. mt31

    Cooling/Heating Effects on Duct Sizing

    A heating and cooling load calculation of the space to be conditioned will give required cfm for for your application. Always size to the larger duct when utilizing ducts for heating and cooling. Heating does not require as many cfms as cooling does.
  3. mt31

    high eff. gas furnaces

    Yes KENRAD, thats right. I have dealt with 90% split systems for residential applications. I have not been able to offer lght commercial pack units with the higher eff. on the heating side of the system. I can imagine that there are some obstacles to this. I would like to be able to put high...
  4. mt31

    Fans in Series

    I do not beleive that 2 fans in series will give 24oo cfm through a duct system. I think it is just like using 2 8" ducts to provide the same airflow as a 16" duct, it doesn't work.
  5. mt31

    How to make a quick relation between CFM and Ton

    350 to 400 cfm per ton of cooling capacity is the proper figures to use
  6. mt31

    Make Up Air Unit?

    you could simply install a duct heater into the supply box, directly after the air handler. you can wire in sequence with units controls. this can also have a variable speed fan motor for cfm requirments. Make up air is a good idea, you could probably tie a fresh iar duct into yhe return box...
  7. mt31

    high eff. gas furnaces

    has anyone heard of or seen a 90% eff. gas packaged heating and cooling unit for residentail or commercial applications
  8. mt31

    90 percent gas furnaces for packaged units

    Why is there not a 90% gas fired heating and cooling packaged units. If there is a unit, where do I find it?

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