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  1. Interesting, thanks. The IQ thermostat has...

    Interesting, thanks. The IQ thermostat has settings which seem to affect the fan RPM (rather than the CFM). I wonder if the same would hold true, e.g. if I say "do 750RPM" and the ductwork is too...
  2. It's a CBX40UHV Lennox Air Handler, which I...

    It's a CBX40UHV Lennox Air Handler, which I believe is an ECM design, yes? It's certainly a variable-speed blower.
  3. Thanks to both of you for answers. I did some...

    Thanks to both of you for answers.

    I did some more tests yesterday and found that the following configuration works pretty well:
    * Fan : keep the fan running, and up the RPM from 485 (default on...
  4. Winter fine, summer is out of balance

    We have a 2 story house in southern California about 1700sft. Last year we changed out the old nat gas furnace for a Lennox heat pump system and had solar PV installed.

    The master bedroom (MBR) is...
  5. The service tech who came was very good, and said...

    The service tech who came was very good, and said that the original installer had forgotten to remove or cut some wire or circuit that needed to be done to put it into both Heating and Cooling mode. ...
  6. Lennox XP16 / CHX40UHV / iComfort : blowing cold air in Heat mode

    Our heat pump was installed in August and we used it over the summer in cooling mode with good results. It's been off for a month or so for the mild fall temperatures we have in the San Diego area....
  7. If it were running at 120VAC I'd just use my...

    If it were running at 120VAC I'd just use my Kill-A-Watt, but I don't have any sort of clamp-on ammeter.

    I was poking around in the Installer'sConfig screens on the iComfort and did see some...
  8. Lennox XP16 / CHX40UHV Air Circulate Mode Watts

    We just had our old gas furnace replaced with a Lennox Heat Pump system:
    * iComfort WiFi Thermostat
    * CBX40UHV-036 (3 ton) variable speed air handler
    * XP16 (3 ton) two stage compressor

    So far...
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    Ouch, sounds like you all in OK are getting the...

    Ouch, sounds like you all in OK are getting the raw end of that deal! Here in California, in SDGE territory at lest as far as I can tell there's no "meter fee" at all. For gas I get billed per...
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    Ok, fair enough and thanks for clarifying that. ...

    Ok, fair enough and thanks for clarifying that. How about we agree to disagree on the question of Solar panels?

    What I really came here for was advice on HVAC, specifically whether a heat pump...
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    Ok, I think I understand my confusion :grin2::...

    Ok, I think I understand my confusion :grin2:: although technically all Air conditioners are "heat pumps" in the thermodynamic sense, in the industry the terms have special meanings, e.g.
    • "Heat...
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    I thought that all minisplits were heat pumps......

    I thought that all minisplits were heat pumps... am I misunderstanding something? Are there non-heatpump minisplits?
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    Tommy, I've asked the moderators to look into...

    Tommy, I've asked the moderators to look into your posts, as so far you've been 100% snark and 0% content. I'm happy to entertain a strong disagreement if you bring facts and data, or even if it's...
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    The house is stucco with concrete roof and quite...

    The house is stucco with concrete roof and quite well insulated. If we lived closer to the ocean we wouldn't need A/C, and if we lived further away we would need it without question. We are kind of...
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    No, but that's because you left out 80% of our...

    No, but that's because you left out 80% of our electricity usage!

    My Math:
    The PV system will be about $19k after rebates & tax credit, and should generate 7800 KWH/year. Our average utility...
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    I can't tell if that's sarcastic or serious...can...

    I can't tell if that's sarcastic or serious...can you explain?
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    Good question - in this case, neither - we are...

    Good question - in this case, neither - we are limited by roof space, so "oversize" in this case means going to go for the higher efficiency panels (SunPower E20s) which should get us a little under...
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    Heat Pump in San Diego?

    Hi, first time poster, would appreciate your advice...

    We are in the process of having a good sized grid-tied solar PV system installed, and have planned to intentionally over-size it to make room...
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