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  1. #14
    Join Date
    Mar 2009
    Location
    Brevard County, FL
    Posts
    582
    Personally I am a firm believer in the heat pump. Of course, I live in central Florida where we see the mid to upper 20's a few times a year. As compared to electric heat the economics are a no brainer. I've had success using a time delay on the blower fan to allow the evap coil to get hot before the air starts blowing.

    I recommend them to MOST customers with electric heat strips.

  2. #15
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by kevster View Post
    I've had success using a time delay on the blower fan to allow the evap coil to get hot before the air starts blowing.
    i would not recommend that unless you are a seasoned HVAC technician

    that time delay is a scary thought, because on the days where the temperature is just cool enough to run the heat pump

    your compressor is straining due to excessive high pressure which can be dangerous as well



    .

  3. #16
    Join Date
    Jan 2008
    Posts
    2,096
    I agree with several previous posts about improper installation, and mis-information to the end user.
    Heat pumps can save a great deal, sized properly, and controlled properly.
    Making sure customers understand the limitations of HP's goes a long way.
    Fluctuating gas and electric prices make the economic balance point a crap shoot. Had a customer with LP as back up, and he wanted to know to the penny what his balance point should be. Told him let us know each month what his electric and LP prices are, and we could give him that info. He dropped the subject pretty quickly.
    As far as what we have installed, customers have been pleased with the savngs and performance.
    We don't promise huge reductions in utility bills, and if a system is blowing cold air it's not the HP's fault. We go there and fix the problem.
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  4. #17
    Join Date
    Mar 2009
    Location
    Brevard County, FL
    Posts
    582

    Thumbs up

    Quote Originally Posted by Airmechanical View Post
    i would not recommend that unless you are a seasoned HVAC technician

    that time delay is a scary thought, because on the days where the temperature is just cool enough to run the heat pump

    your compressor is straining due to excessive high pressure which can be dangerous as well



    .
    Point taken and agreed Airmechanical, that time delay needs to be tweaked to the proper length and can be done with experience and seasoning. I regularly use the time delay for customers who complain of cold air at start-up and have been doing so for many years. Can't recall a problem as of yet. I am very careful and precise with this practice though.

  5. #18
    Join Date
    Jan 2008
    Posts
    2,096
    And that time delay thing isn't a good idea.
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  6. #19
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by 2old2rock View Post
    And that time delay thing isn't a good idea.

    it's a good idea if he would just......

    wait a minute, this belongs in the technical section



    .

  7. #20
    Join Date
    Sep 2005
    Location
    Bay Area, CA
    Posts
    843
    Quote Originally Posted by gcastillo View Post
    The key in his post is he had straight electric heat. If you have natural gas at least in my area it is best to use natural gas.
    Natural gas in california is to cheep and doesnt save any money compared to a heat pump system. We did the numbers around the bay here and could not find an area where we'd reccomend a hp if you already have a gas furnace.

    Now we did the numbers for my father that lives in the el dorado hills above sacramento with a propane fired central furnace, and it does make sense, we put in an 18 seer a/s hp with a 92% furnace and his return on investment is like 3 years. (of course he didnt pay retail for the equipment so its a bit quicker then average)

    The other great thing about duel fuel which rids yourself of a complaint of hp systems is quick defrost and when in defrost you can be putting alot of heat over that coil so you dont get cold air out of the vents.

    As far as heat pump systems here, we've found that the reason people dislike them and how we can fix them is improving the building envelope, to many people here have poor wall insulation or large single pane windows that are leaky and pull heat out of you, these people are always comfortable with gas fired furnace because they feel the draft ontop of them and theres no defrost mode nad this counters all of the radiant heat loss there bodys get from the walls and windows. So you couple the poor windows and walls, with a heat pump that doesnt have a high temp split, and the occasional defrost, its going to make them uncomfortable.

    And on the bonus you can downsize the system after you tighten up the house.

    I really need to get into the window and insulation business with how much I talk about improving that instead of putting money into a higher efficency furnace.
    Global Warming or: None like it hot
    No pleasure, no rapture, no exquisite sin greater... than central air. -Dogma

  8. #21
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,603
    Quote Originally Posted by WhoIsThat? View Post
    Can you give an infiltration rate and R value?
    I guess it also depends on the 97.5 percentile outside temps.
    JMO

    If you live in maryland. And you have a heat pump with electric aux heat.
    And your thermo balance point is above 35°F, you need more insulation, and or need to reduce your infiltration.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #22
    Join Date
    Sep 2008
    Location
    Central Florida
    Posts
    40
    I’ve got a 10 year old 4 ton heat pump (york). I have no complaints. Gas is not an option because the line that runs down my street stops 4 lots from my house. It frosts up even in central Florida’s mild winters but I just spray it down with recycled rain water (red neck water source heat pump). When this old unit dies I’ll probably go with a climate master gshp with vertical wells.

  10. #23
    Join Date
    Nov 2008
    Posts
    1,673
    The ground source pumps seem like a good idea.
    http://en.wikipedia.org/wiki/Heat_pump

  11. #24
    Join Date
    Jun 2006
    Location
    Hastings, MN
    Posts
    417
    Here in Minnesota with off peak power at $.05kw and nat gas at $1.15 a therm or propane at $2.10 a gal. Heat pump is a no brain er. huge savings. We use Carrier Infinity set lock out at 15-25 degrees depending on balance point and comfort. Back up is a 95% Carrier Infinity furnace. I have had great feedback on savings.
    Aint Notin Sweeter, Then A Brand New Heater!!!!!!!!!!

  12. #25
    Join Date
    Dec 2007
    Location
    oregon
    Posts
    885
    My most satisfied customers are those with geothermal heatpumps...
    Genius = The guy who can do anything...except make a living!

  13. #26
    Join Date
    Jan 2004
    Location
    Burleson, Texas
    Posts
    1,741
    The main problems I see with customers complaining about their HP is, the system has install issues or the controls are not set up correctly..HPs work really well in my part of the country (North TX)..

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