Debunking the 500 sf per ton rule

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  • เผยแพร่เมื่อ 4 พ.ย. 2024

ความคิดเห็น • 27

  • @Mikecianfrocco
    @Mikecianfrocco 5 ปีที่แล้ว +2

    This was the video that got me into load calculation’s

  • @kennethdean4349
    @kennethdean4349 5 ปีที่แล้ว

    Thanks for sharing your experience. It's a shame that only 29 have given the video a "like." We have an uphill battle to get the public to understand the absolute need for blower door testing and educated load calculations.

  • @mhoush
    @mhoush 6 ปีที่แล้ว +1

    Great job Neil, thank you!

  • @GlenS123
    @GlenS123 6 ปีที่แล้ว +1

    Software and manual J do not size equipment to match it to the load on the coldest day. If you lost power for a day during a cold snap it couldn't recover the house if it was sized your way.

    • @neilcomparetto5282
      @neilcomparetto5282  6 ปีที่แล้ว +2

      Glen Schmidt I size my equipment according to ACCA manual S, I’ll share a link.
      Staged electric heat, space heaters, would handle “acts of God”.
      www.acca.org/HigherLogic/System/DownloadDocumentFile.ashx?DocumentFileKey=2f0a6828-2205-e112-745f-7215c9a85541&forceDialog=1

    • @TedKidd
      @TedKidd 5 ปีที่แล้ว +4

      Interesting argument to justify being a hack!
      "I size my equipment way larger than necessary in case aliens land"

  • @TedKidd
    @TedKidd 5 ปีที่แล้ว +1

    7:28 "I did a very aggressive man J, including measured leakage, and it came back smaller than most would install.
    Tracking with my ecobee turns out Wrightsoft sized equipment nearly 3x what the house was using on a day that was below design temperature."
    9:06 at 1° 27,000 BTU satisfies house.

    • @heatmanhall1
      @heatmanhall1 2 ปีที่แล้ว

      Remember the fault isn't the software. They are required to size in accordance with ACCA in order to be approved software. Same can be said for all ACCA approved software.

  • @johnpearson5865
    @johnpearson5865 6 ปีที่แล้ว

    Awesome very help learned a lot here
    Thank you

    • @neilcomparetto5282
      @neilcomparetto5282  6 ปีที่แล้ว

      John Pearson thanks man, I’m glad you found it helpful.

  • @andrewburke5815
    @andrewburke5815 ปีที่แล้ว

    Of course if you're going to be fine with 75 degrees when it is only 92 degrees outside, this is enough. that is way too hot for me (70 degrees). we are usually around 100 and have a lot of days between 105 and 110. we currently have a brand new 4 ton heat pump system that is totally failing to cool our 2500 sf house built near sacramento in 2001. 78 degrees upstairs on 89 degree day.

    • @neilcomparetto5282
      @neilcomparetto5282  ปีที่แล้ว

      FWIW I ended up putting in a 1.5-ton Mitsubishi SUZ/SVZ. I have no problem maintaining 70° inside when it’s 15° - 95° outside. Sounds like you may have some insulation/air tightness/duct issues that your HVAC has to overcome.

  • @NatetheHouseWhisperer
    @NatetheHouseWhisperer 6 ปีที่แล้ว +1

    Great video! Great real world load calc! Love the 1:1 ratio mention!
    Can you make this public? I'd like to add it to my channel, couldn't find it in search. Also, is it possible when the unit turned off that was a defrost cycle?

    • @neilcomparetto5282
      @neilcomparetto5282  6 ปีที่แล้ว +1

      Nate the House Whisperer I watched turn off completely at 3°. It’s possible some of those were defrost.

  • @Mikecianfrocco
    @Mikecianfrocco 4 ปีที่แล้ว

    Waiting for the follow up on the cooling side !

    • @neilcomparetto5282
      @neilcomparetto5282  4 ปีที่แล้ว

      Mike Cianfrocco it’s about 25-30% oversized.

    • @Mikecianfrocco
      @Mikecianfrocco 4 ปีที่แล้ว

      Neil Comparetto So do you think a one and a half ton is a better fit?

    • @neilcomparetto5282
      @neilcomparetto5282  4 ปีที่แล้ว +1

      Mike Cianfrocco I have enough cooling data to feel comfortable putting in a 1.5 ton... If I’m a little short I’ll do some attic work.

  • @MrLaffertyheating
    @MrLaffertyheating 6 ปีที่แล้ว

    Great video! I wish wrightsoft would only allow modeling with blower door input. It should not be a choice!

    • @neilcomparetto5282
      @neilcomparetto5282  6 ปีที่แล้ว

      Jeremy Calvin thanks man!

    • @heatmanhall1
      @heatmanhall1 2 ปีที่แล้ว

      They can't. Up to the input person. Remember the fault isn't the software. They are required to size in accordance with ACCA in order to be approved software. Same can be said for all ACCA approved software.

  • @RobHVAC
    @RobHVAC 6 ปีที่แล้ว

    Good info

  • @E150GT
    @E150GT 4 ปีที่แล้ว

    so if we dont what whats in the house insulation wise? what do you do? SWAG it?

    • @neilcomparetto5282
      @neilcomparetto5282  4 ปีที่แล้ว

      You can do a couple things (I assume you’re talking about wall); remove a light or receptacle cover on an exterior wall, go off local building codes during the time of construction.