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  1. Thanks to all of you for your replies. I couldn't...

    Thanks to all of you for your replies. I couldn't remember the kind of compressor that failed, but Bristol was what I was told was the failed compressor. I was also told that if I purchased a new...
  2. Carrier Heat Pump quit. Here are the options.

    Good day! I have a Carrier dual fuel system that was installed at my house in November, 2009. The heat pump (subject of this discussion) is a model 25HNA636A0030020. The unit has been professionally...
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    Cold Feet, Thanks for the info on the Infinity...

    Cold Feet,

    Thanks for the info on the Infinity "crippling." Do you (or anyone) have any specifics on Carrier telephone access? I've seen some old google references dating back to 2005, but nothing...
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    Carrier Infinity or IAQ Thermostat?

    I'm about to have a new Carrier Infinity 2 stage heatpump and a Carrier 2 stage 95% furnace installed in a vacation home. My initial thought was to have the Infinity thermostat installed too. The...
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    I did a Manual J calculation using an outside...

    I did a Manual J calculation using an outside temperature of 30 degrees, figuring that's about all I'd get out of a HP. Here are the loads...

    Total heat gain: 17,000 BTUH
    Total heat loss: ...
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    Is it worth it?? 20 seer vs 16 seer

    I'm soliciting bids for a dual fuel system for a house I'm building in western NC. Looks like a 2.5 or 3 ton HP is going to work. I don't have much need for the cool side of the HP but can use all...
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    DGIO-Not Thanks for your input. Sounds like...

    DGIO-Not

    Thanks for your input. Sounds like externally wrapped metal is the way to go. Happy 4th.

    LKSmith
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    Ducts...What's Best

    I've been soliciting bids from HVAC dealers to put a dual-fuel system in a new house I'm building. I've had four different companies give me three different options on duct work. I'm clueless on...
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    OK, I asked the question and you smart guys just...

    OK, I asked the question and you smart guys just blew me away! So let me ask a basic and more specific question...If I install a heat pump at 5,000 ft. elevation that will probably operate with...
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    Heat Pump Derate?

    Greetings,

    My Ruud LP fired furnace says the output is derated 1.8% for every 1,000 feet of elevation. Does a heat pump have a derate in the heat mode? Just wondering...

    LKSmith
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    Is this blasphemy??

    Let me follow up on this thread where I have a home that require little or no cooling but could require a lot of heating--that I would like to do with a HP. Now, please don't take my name in vain,...
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    Beenthere...what's an IQ heat pump? (And what's...

    Beenthere...what's an IQ heat pump? (And what's the difference between it and a 'regular' heat pump?)

    LKSmith
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    Sizing a dual fuel system

    Greetings: I'm about to build a second (later retirement) home in the mountains of NC. Elevation is about 5,000. It doesn't get very hot there in the summer--seldom higher than the upper 70s. In the...
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    I did a bit of follow-up on the telephone...

    I did a bit of follow-up on the telephone controllers. As was previously mentioned there are several brands available. In this new house I'm going to do the heat pump/dual fuel system. Could anyone...
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    Thanks for your help. lksmith

    Thanks for your help.

    lksmith
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    Telephone Control

    Greetings:

    I'm about to build my retirement home that for the next couple of years will be just a vacation home. In my present home I had new Trane dual fuel systems installed just a couple of...
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    So does that mean if you needed a 2 ton HP at sea...

    So does that mean if you needed a 2 ton HP at sea level for heating and cooling, you'd need a bigger unit at a higher elevation, or just a greater fan speed?

    Larry Smith
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    Heat Pump Derate?

    One last question for you pros...

    In previous posts I made mention of the fact that my LP furnace at 5,200 feet elevation is derated by 1.8% per 1,000 feet of elevation.

    Are heat pumps derated...
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    Yesterday morning the OAT was plus 1 degree F....

    Yesterday morning the OAT was plus 1 degree F. The furnace was still cycling on and off. Based on the LP derate of 1.8 % per 1000 ft. (according to Ruud) I figure this furnace would continue to cycle...
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    Thanks for all of your comments. I knew this...

    Thanks for all of your comments. I knew this wasn't going to be as easy as I had hoped!

    dhvac, you said "before you decide to go the route of having an oversized 2 stage heat pump put in make sure...
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    Geodude, Does the 2 stage work the same way in...

    Geodude,

    Does the 2 stage work the same way in the cooling mode? Starts at say 2 tons then ramps up to 4 tons only if needed (which it probably wouldn't be needed)?

    Larry Smith
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    Tigerdunes, My home is a 2,478 sq. ft. log...

    Tigerdunes,

    My home is a 2,478 sq. ft. log home. The logs are 12 inch round pine--thus no additional insulation. There are a fair number of windows and they are all thermal, low e, tinted windows....
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    Let me follow up on my last comment. I found...

    Let me follow up on my last comment.

    I found some numbers that I had worked up previously and I came up with a requirement of about 48KBTU to heat the house down to about 30 degrees. Is there...
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    Thanks for your comments... Would a 2 ton heat...

    Thanks for your comments...

    Would a 2 ton heat pump keep the house warm down to 30 degrees or so? Isn't 2 tons typically about 24-25KBTU and so wouldn't the HP run out of heat capacity at a fairly...
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    Sizing a Heat Pump...for Heat

    Greetings,

    I have a 2,400 sq. ft. home in the mountains of NC. Sort of perched on top of a 5,000 ft. mountain. We have no air conditioning and only a grossly oversized LP Ruud 120KBTU, 94 AFUE...
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