Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

What is the proper heat temperature coming out A vent?

I don't think my heat strip in a packaged ac/heat central ac/heat unit is enough kilowatts. I know that you can stick a thermometer directly in the vent where the heat comes out and it should be a certain temperature. What is this temperature? We have had an upgrade in the wiring size, an upgrade to A whole new 200 amp service center and there is a 7.5 kilowatt heat strip in the unit. I'm thinking we need a 10 or A 15 kilowatt heat strip instead, now that the wiring has been upgraded and large enough to handle either...Footage wise A 7.5 figures real close but we also have vaulted ceilings in this mobile home... How warm should the temperature be coming directly from the vent? I have had two people at time tell me this and I have forgotten what it was..and the people are no longer here.

Update:

There is only one palce for a heat strip here..It is made for 1 and 1 only...I will get my thermometer and do a check...Then select a best answer after all info is in

Update 2:

I do know it is over 100 degrees..for any properly working heater will heta the house itself to 90 or 95..thus meaning the initial heat coming out is over that

6 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    It depends on the temperature of the air coming into the furnace and on the air flow which you have not given us. In my area (North Georgia) 7.5 KW is usually enough heat for a mobile home but I usually use 10 KW as a minimum to be safe. With resistance heat there is little reason to use lower capacity strips except to save a little on the wire to supply their power.

    I would consider a 30 degree F rise about the minimum acceptable

  • 1 decade ago

    If you really want to know if the strip is working correctly you will need an amprobe. Check the amperage on both wires going to the heat strip, they should be very close. Using the power formula P=V x A (Power 7500W = Volts 220V x Amperage) divide the power 7500W by the volts gives you 34 amps. This is approximately what your amprobe should read. Temperature rise is dependent on the furnaces air flow. More air, lower temp rise. Less air, higher temp rise. 40-70 degrees is normal temperature rise. In other words if return air temp is about 70 degrees with 55 degree temp rise the outgoing air would be about 125 degrees. Hope this helps

    Source(s): Journeyman Refrigeration Mechanic and Gas Fitter 15 years in HVAC
  • 1 decade ago

    There are several variables but a range would be 105-120 degrees. 7.5 kw is not alot but should be ok in a mobile home depending on size and insulation and windows. Also make sure the heat strip is all on, there is a chance that not all of them are not working.

    Source(s): hvac contractor
  • 1 decade ago

    You should have about a 20 degree temperature rise between the air going into the furnace and the air coming out.

  • How do you think about the answers? You can sign in to vote the answer.
  • 1 decade ago

    Heated air should be no hotter than 80 degrees!

  • 1 decade ago

    depends on what the fan limit switch is set for it to kick on , could be around 150 deg,

    Source(s): maint man
Still have questions? Get your answers by asking now.