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  • Forced Air Question

    Maybe a dumb one. Does SEER rating only pertain to electrical efficiency on the A/C side? If so, what would you look for to determine efficiency on the heat side in a gas pack situation?

    Thanks.

    J.C.

  • #2
    Re: Forced Air Question

    AFUE is how heat efficiency is measured, minimum efficiency is 80% and I believe york makes a 98% efficient furnace, once you get to 90% or above you are usually dealing with a condensing furnace. Most gas packs are going to be 80% depending on the age. I am not sure on high efficiencies of gas packs.

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    • #3
      Re: Forced Air Question

      Thanks. I have seen the AFUE term but never worked with it enough to know anything about it.

      Do you work with HVAC much? If so, I have another question.


      Heat pumps in the past had a horrible reputation for being "cold" in the winter. I have heard multiple times from different people, ages, sizes of house that they are very satisfactory now.

      Do you or anyone else find that to be the case?

      Thanks.

      J.C.

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      • #4
        Re: Forced Air Question

        I dont do much with heat pumps JC, but I do know they have a lower temperature rise that a forced air gas. Warm air from a gas furnace is usually 45 to 65 degrees warmer than room temp, but I think heat pumps are between 20 to 30.

        Andy

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        • #5
          Re: Forced Air Question

          Yes heat pumps do have a much lower overall heat Delta T. And it declines the colder the outside ambient becomes.

          I would not have one personally. I like to feel a good heat content in the air.

          A lot of heat pumps are set up badly and blow more air than they should making the home feel uncomfortable.
          Just slow, not stupid

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          • #6
            Re: Forced Air Question

            A decent heat pump is pulling heat out of the air into the teens, but not usually enough to satisfy the heat loss of the house. This is why a heat pump system has a back-up heat source. In my opinion the best heating system for the money and not sacrificing comfort is the heat pump system with fossil fuel for back up heat. This is called a hybrid system or duel fuel.
            For most of the heating season the heat pump will run, which is one of the top economical ways to heat your home. Yes there are disadvantages to the heat pump, the biggest being the added air noise. Another popular one is the fact that if you feel the air coming from the vents in heat pump mode it feels cold. This is because of wind chill and the air temp is closer to room temp than that of a fossil fuel heat.
            When the outdoor temp goes below 35 or 40 degrees the system shuts off the heat pump; and via an outdoor temp sensor; turns on the fossil fuel furnace. In the colder parts of the year the fossil fuel furnace gives you the added comfort of, lower air noise and volume, and higher air temps.
            Just a little side note for those of you who think that; for good reason; they will only use AC two weeks out of the year. That is a false presumption because with the AC you will be comfortable in the home during the in-between months before and during the summer. As for me I was able to sleep better throughout the entire night because of the dehumidification of the AC and the cooler house temps.

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            • #7
              Re: Forced Air Question

              my last home had a heatpump with electric heat strips to back it up. gets kinda pricey on the electric bill. but it was an all around great system when I got the 20 year old one replaced with a brand new one.
              No, it's not rocket science, it's plumbing and unlike rocket science it requires a license.

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