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  1. Replies
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    Thanks Gary. the math is simple - much simpler...

    Thanks Gary. the math is simple - much simpler than I realized. I'll see if I can find a COP curve for my Lennox HP and perform the calcs. This is a big help.
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    Thanks, Beenthere. My Furnace is a ~1990 Lennox...

    Thanks, Beenthere. My Furnace is a ~1990 Lennox and it is very reliable, and since I have a 2005 Lennox HP and can't cost justify a new furnace given the HP takes care of most of my heating needs. ...
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    Thanks for the help. I'll look for an online...

    Thanks for the help. I'll look for an online spreadsheet which will show cost curves.
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    Speaking of Balance Point, how did you arrive at...

    Speaking of Balance Point, how did you arrive at 20 - 25 degrees? Is there a rule of thumb or a formula? I need to adjust my balance point (I had it set to zero because Nat Gas was much more...
  5. Heat Pump Economically Optimum Balance Point

    I searched this site and could not find any discussion on this....

    Does anyone know of a internet calculator that would help to determine the economic balance point for a heat pump? FYI-Midwest...
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    I have a 1964 model oil burning furnace with a...

    I have a 1964 model oil burning furnace with a honeywell thermostat (Don't know what brand the Furnace is, though). When I start it, it will run for about 1 minute and then cuts off. It has a 45...
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    UPDATE: I removed the grill from the outdoor...

    UPDATE: I removed the grill from the outdoor coil and used the picnic knife and the fin comb. Actually, the picnic knife was too broad so surprising, the fin comb on "15" (the smallest comb) worked...
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    Thanks Midwest. The plastic pic-nic knife idea...

    Thanks Midwest. The plastic pic-nic knife idea is intriguing. I have (unfortunately) invested $10 in the comb, but will gladly pitch it if the knife proves superior. Again, thanks. -Sharp
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    Hello - I have hail damage to my outdoor coil on...

    Hello - I have hail damage to my outdoor coil on my lennox HP 29 heat pump (3-ton). I have a "coil comb", and was wondering what specific size I should use? The selections are 8, 9 , 10, 12, 14,...
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    right I guess?

    right I guess?
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    right?

    right?
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    thanks, I think I understand now that I'm in a...

    thanks, I think I understand now that I'm in a good position. My short cycle is OK as long as my check valve and pump are new. Am I correct? Regardless, I'm happy to have a new sump pump (300%...
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    I know it's Sat Night. However,can anyone add to...

    I know it's Sat Night. However,can anyone add to this question?
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    I looked into getting a water powered sump pump...

    I looked into getting a water powered sump pump myself, but decided against it after giving it some thought... A water power sump pump uses the water pressue of a municiple water system to turn the...
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    thanks 2hot...yes everything matches up, and I...

    thanks 2hot...yes everything matches up, and I didn't mean to suggest my sump pump has a shorter life NOW, I'm worried it might have a shorter life in the FUTURE because it has a short pump cycle. ...
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    I know this is an HVAC formum, but I'd thought...

    I know this is an HVAC formum, but I'd thought I'd ask this question since I know most HVAC professionals also know a little (or a lot) about plumbing....

    I've just changed out my sump pump from a...
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    Thanks, SelfEmployed. Based on your answer, I'm...

    Thanks, SelfEmployed. Based on your answer, I'm assuming that sealed sump-radon system will not flood **as quickly** as an unsealed, sump-only system?

    Therefore, the alarm you mention will...
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    is this the right forum to ask this question?

    is this the right forum to ask this question?
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    I have a radon system that is sealed in my sump...

    I have a radon system that is sealed in my sump pump pit. I don't know anything about this type of system. Question: since the sump pump area is seal (supposedly air tight), what risks do I have...
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    Thanks. That's what I figured. I've currently...

    Thanks. That's what I figured. I've currently got my gas furnace effectively "locked out" and it only comes on when the indoor t-stat senses the Heat Pump cannot keep up with the temperature...
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    I used the "search" function at this site and it...

    I used the "search" function at this site and it appears this topic hasn't been covered....

    so, does anyone know if an economic balance point calculator exists somewhere on the internet? I'd like...
  22. Thread: utility prices

    by sharp
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    Central Ohio: $1.60 Therm Gas, $0.075 kwH...

    Central Ohio: $1.60 Therm Gas, $0.075 kwH electric (AEP).
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    Jacob, that's a heck of an idea. I'll do that.

    Jacob, that's a heck of an idea. I'll do that.
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    Jacob, thanks so much for the explanation. I...

    Jacob, thanks so much for the explanation. I think it's the longer run times during colder weather. And, to your point, I'm NOT running the indoor fan constantly. I may have confused you with my...
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    I don't believe I'm confusing a defrost cycle for...

    I don't believe I'm confusing a defrost cycle for an Aux run...I understand the sound difference of each clearly (HP defrost - fan shuts off followed by a "whoosh" at its end vs. Gas Auxillary heat-...
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