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Type: Posts; User: jesup

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  1. Replies
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    I'd think bigger setbacks would also cause more...

    I'd think bigger setbacks would also cause more high stage, though perhaps good predictive thermostats might avoid much high in that case by bringing in low earlier (and longer). I also suspect the...
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    695

    (Warning: no expert here!!!) I wonder if the...

    (Warning: no expert here!!!)

    I wonder if the issue might be that there's too much air exchange with more-humid outside (or downstairs) air? The infinity cools it down, extracting humidity as it...
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    2,334

    Sounds like something worth a few pictures, if...

    Sounds like something worth a few pictures, if you have them...
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    2,334

    This happened to me just over a year ago. 100'...

    This happened to me just over a year ago.

    100' tree, 40' from the house blew up (literally - biggest piece left was 12' x 1' x 6"). Some pieces were thrown 2-300 feet; 6' sections were thrown...
  5. I'd think you'd keep the HP's running down to a...

    I'd think you'd keep the HP's running down to a much lower temp; so long as the BTUs they add cost less than gas BTU's, it makes sense for them to run alongside the gas unit. Depends on the cost of...
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    Just to close the loop on this, I told them to go...

    Just to close the loop on this, I told them to go with the Thermopride OH6.

    BTW, the old furnace was a 1950's Timken; apparently one of only two still in use in Bristol (CT). The service company...
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    From some research (my parents are in CT, I'm in...

    From some research (my parents are in CT, I'm in PA), "American Radiator" == "American Standard".

    The efficiency (supposedly) of the burner is around 80%, but that's burner not AFUE.

    Seems like...
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    Bump - any opinions? From what I read, the...

    Bump - any opinions?

    From what I read, the Thermopride OH6 is a nice unit. But does it make sense to have two units (and the resultant added maintenance costs and chance of failure)? How much...
  9. Replies
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    Greenhouse is detached (by around 6');...

    Greenhouse is detached (by around 6'); underground piping to the heating system. Greenhouse is cooled in the summer via venting and what I guess is a swamp-type evaporative cooler (but with the...
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    Two furnaces vs one and a heat exchanger

    My parents need to replace the old main furnace in their house, and have two options they need to choose from. Currently they have an old kerosene forced-air furnace (forget the name) to heat the...
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    I know there are some heat-pump-based DHWH...

    I know there are some heat-pump-based DHWH heaters, which take heat from the house or a coil in a duct. As with any heat pump, it's more than 100% efficient.

    In the summer, you get some win since...
  12. Yes, I installed 2-stage air-2-air HPs for 2/3's...

    Yes, I installed 2-stage air-2-air HPs for 2/3's of my house a couple of years ago. Working well; balance temp is pretty low since I've done a LOT of sealing and insulation since then. No problems...
  13. They were (I believe) basically using a heatpump...

    They were (I believe) basically using a heatpump to move heat from solar-water panels (during the day) into large insulated water storage tanks. Those are used to provide heat via a water-to-air...
  14. So what did you do for the Kennett Square home? ...

    So what did you do for the Kennett Square home?

    I'm still interested in the idea of solar-pumped heatpump; you avoid one major bugaboo of solar cells (low efficiency) and a major inefficiency of...
  15. If anyone saw the latest Fine Homebuilding, they...

    If anyone saw the latest Fine Homebuilding, they have a "zero-energy" house article (Oregon coast area). Green roof, solar panels, insulated, passive solar, etc, etc. One unusual aspect was a...
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    Leaving the fan on can help keep temps more even...

    Leaving the fan on can help keep temps more even (increasing comfort and potentially reducing costs, since you don't need to set it according to the "worst" room), but mostly this is in the case of a...
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    Assuming that the heat pump $/BTU is lower than...

    Assuming that the heat pump $/BTU is lower than gas $/BTU, wouldn't it make sense to run the HP with gas firing only as aux heat? Even at 17 degrees outside, most modern HP's are well over 2 COP...
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    Running longer (and lower) in the summer means...

    Running longer (and lower) in the summer means more dehumidification (especially when you're not at the limits of the system). More dehumidification means more comfort, or the same comfort at a...
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    Re: Re: Unit efficiencies

    Similarly here in the Philly PA area - we have ~5500 degree-days of heating, 1000ish of cooling; temps down to single digits or zero on occasion (Zone 6/zone 7 boundary), and in the Exelon/PECO area...
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    It looks like the board was restored from a...

    It looks like the board was restored from a backup - it was refusing connections for a while, and after it came back some recent comments were missing. Perhaps a problem with a disk at the hosting...
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    Thanks - I hadn't thought of remote-monitoring...

    Thanks - I hadn't thought of remote-monitoring it. I have had plastic put down, and have closed the vents already. It sounds like it makes most sense from here to repair/replace the floor...
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    We had 6 mil poly put down in both this fall,...

    We had 6 mil poly put down in both this fall, after some work to reduce intrusion on the uphill side (on the side that sometimes had water running through it after multi-inch downpours, we dug to the...
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    We have a house with two 1970-ish wings which...

    We have a house with two 1970-ish wings which have dirt ventilated crawlspaces, and I'm wondering if I should seal and insulate the walls of the crawlspaces as per current science.

    One is ~600 sq...
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    Philadelphia burbs (former PECO area): Normal...

    Philadelphia burbs (former PECO area):

    Normal rates ~0.13/KWh (includes all distribution charges)
    Electric heat rate: ~0.14/KWhr summer, ~0.063 winter (above first 600KWhr). Note that a friend...
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