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  1. Replies
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    Thanks so much for the contractor map. I don't...

    Thanks so much for the contractor map. I don't see anyone in the town where this place is located. I will look in the yellow pages----what type of certification/accreditation should a HVAC tech...
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    Goodman air handler & heat pump: AC issue

    Thank you Bazooka Joey. Tried to add a couple of photos & again could not add them. I did see moisture on the outside of the insulation on the pipe going into the coil on the air handler. I did...
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    So if HVAC tech found no leak in the AC system...

    So if HVAC tech found no leak in the AC system what could be causing refrigerant line & valve to be freezing up?
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    2old2rock: so what would you be checking out on...

    2old2rock: so what would you be checking out on this 1998 Goodman heat pump if you saw ice on the refrigerant copper pipe & valve, & what are the kinds of things that could be failing on the unit? ...
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    So let me ask you: when you see a frozen AC...

    So let me ask you: when you see a frozen AC refrigerant line on an older heat pump what kinds of things would you be checking?
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    issue with reversing valve/thermastatic expansion valve or something else?

    Thank you both for your response. I will call a different contractor. Does the frozen line sound like an issue with "reversing valve" or with "thermastatic expansion valve", or could it be...
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    Goodman Heat Pump AC line freezing

    Getting ready to rent this place so I had the air handler, heat pump & thermostat inspected. Everything looked fine during the inspection. Was told maintenance not needed until next spring. ...
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    what would be a better (smaller in size & weight)...

    what would be a better (smaller in size & weight) Trane outdoor AC condensing unit that i could put midslope next to house. am concerned that current size & weight of the XLi15 2 1/2 ton AC unit...
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    thanks all. will do. merry chrisitmas!

    thanks all. will do. merry chrisitmas!
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    jerryd, thanks so much for your response. it got...

    jerryd, thanks so much for your response. it got me looking at dominion va power website to see if they have anything but it looks like the energy audit is for "income-qualified customers". it was...
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    thanks southern mech. it is the biggist 2 1/2...

    thanks southern mech. it is the biggist 2 1/2 ton ac i have ever seen!
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    what size filter does this 2 stage variable speed...

    what size filter does this 2 stage variable speed furnace recommend?: Trane TUD2B080A9V3VB 80% afue, 80k btu input, 64k btu stage 2 output, 41.6k btu stage 1 output
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    can you tell me what size AC unit?

    can anyone tell me the size in tons of this Trane AC unit as it looks ALOT larger than 2 1/2 tons: 4TTX5030A1000A

    is there a way to tell from the model number or serial number what the tons are...
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    badtic, what's the right type of filter? assume...

    badtic, what's the right type of filter? assume it is not a fiberglass filter. is it one of those 90 day pleated filters?
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    thank you so much!

    thank you so much!
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    will do. thanks again southern mech!

    will do. thanks again southern mech!
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    ok thanks so much southern mech.

    ok thanks so much southern mech.
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    southern mech, so in that case, would you...

    southern mech, so in that case, would you recommend keeping filter where it is at the 14x20x1 size filter?
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    so if it is in the unit in the bottom of the...

    so if it is in the unit in the bottom of the furnace it will catch more stuff than where it currently is just R of the furnace?
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    thanks southern mech. do you get the blower door...

    thanks southern mech. do you get the blower door or thermal imaging test done before improving insulation around doors & 1 single pane window or afterwards?

    who does these tests?
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    southern mech: the filter is currently just R of...

    southern mech: the filter is currently just R of tjhe furnace. so are you recommending keeping it there at same size of 14x20x1 or moving it inside the bottom of the upflow furnace at a size of...
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    tighten up house/checking for leaks

    tedkidd & others convinced me in a separate post i need to tighten up house with the smaller furnace before even considering getting a humidifier, so my thanks to everyone for your input!

    i need...
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    make difference which size filter?

    contractor installing furnace currently & wants to know if I want a 16X25" filter inside furnace (have to open up furnace to change filters) or stick with current 14X20x1 filter outside furnace. ...
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    not planning on being in the house that long &...

    not planning on being in the house that long & dont want to sink the extra money into a 90 or 95% afue furnace.

    my neighbor with same house plan works for an hvac company (not same who provided...
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    if i get the smaller trane furnace xv80 80% afue...

    if i get the smaller trane furnace xv80 80% afue w/ outputs for Stage2/Stage1 of 64,000/41,600 btuh, &
    i currently have a 1985 carrier at 83% afue with 79k btu output at time of manufacture in...
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    nope, plan to keep basement unfinished (in...

    nope, plan to keep basement unfinished (in response to Southern Mech).

    can anybody tell me more about the 4-5" pleated box filter cabinet & why it would be preferable to use & what it is...
  27. Replies
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    contractor just called & recommended trane xv80...

    contractor just called & recommended trane xv80 furnace 100k btu over 80k btu because:
    --100k would put out 80k btu on high fire/2nd stage vs 64k on 80k model thus being closer to capacity of...
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    Keeplearnin, a second contractor told me you need...

    Keeplearnin, a second contractor told me you need to match the existing furnace blower size to new furnace blower size as well as match up other factors so was trying to figure out existing blower...
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    what is a 2 stage thermostat? trane shows the...

    what is a 2 stage thermostat? trane shows the thermostat XL 802 quoted is 3 heat/2 cool---is that a 2 stage thermostat? thanks
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    blower size

    carrier national office sent me some specs a few minutes ago showing the Carrier model #58SS080-BC, Series 110, upflow furnace manufactured in 1985 has a blower wheel diameter of 10x7.

    If you want...
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    Tigerdunes, you recommended: a Trane coil over...

    Tigerdunes, you recommended: a Trane coil over the third party Aspen. I would also recommend a good 4-5" pleated box filter cabinet.

    Can you or anyone else tell me why you would recommend a trane...
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    trane thermostat & aprilaire humidifier

    on trane's website it shows trane thermostat XL 802 as 3 heat/2 cool
    & XL803 as 3 heat/2 cool with humidity sensor.

    1) if i get an aprilaire humidifier installed with furnace, do i need the XL...
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    Thanks for your response. The thermostat...

    Thanks for your response. The thermostat recommended is a Trane Touch Screen CONT 802A---I looked on Trane website & dont see any info if it is a 2 stage thermostat. Do you know if this model is 2...
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    need info on carrier blower size

    can anyone help me figure out:
    1) the existing blower size i have on the following furnace
    2) if it is an upflow furnace
    3) what %AFUE it was when installed?

    Carrier model #58SS080-BC, Series...
  35. Replies
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    80k vs 100k btus for house?

    received an estimate for residential house (see below for house size, load calc etc):
    *Trane XV80 furnace model #TUD080r9V4K, 80k BTU, 80% AFUE variable speed 2 stage; same contractor later...
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    hi jerryd: in response to your post #53: the...

    hi jerryd: in response to your post #53: the american standard condenser alligiance 14 model #4A7A4030 shows a 15 seer rating on their website at:...
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    thanks jerry, hope ryan can help with the...

    thanks jerry, hope ryan can help with the searches. that AHRI website is really difficult to search. i was able to find some single products like the american standard allegiance 14 model #4a7a5030...
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    jerryd: thanks for responding. 1) so based...

    jerryd: thanks for responding.

    1) so based on the york certificate you provided,the certificate that i receive from the contractor will not specifically note the AC condensor, furnace & coil...
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    thanks for your response, jerryd, & thanks for...

    thanks for your response, jerryd, & thanks for posting ahri response! i have some questions about ahri's statement in post #42:

    "If the certification record shows “Eligible for Federal Tax...
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    since posting this topic on June 22nd & after...

    since posting this topic on June 22nd & after reading 17 pages of posts with differing viewpoints from HVAC experts, maybe you can see why a customer like me is really confused about what qualifies &...
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    when i took off the register it looked like a...

    when i took off the register it looked like a metal box in there. can you tell me if i have lined duct, duct board or flex duct? thanks
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    thanks for the information. how do i know if i...

    thanks for the information. how do i know if i have flex duct or lined duct or duct board for duct vents?
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    acfixr, do you have a link to the spec for the...

    acfixr, do you have a link to the spec for the 1987 carrier model 38ed030300 2.5 ton condenser?

    can anyone tell me if the TOTAL OUTPUT CAPACITY of the American Standard AUD2B080A9362A is 64k btu?...
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    beenthere, you asked if on the coldest nights,...

    beenthere, you asked if on the coldest nights, did it cycle off, or have to run 24/7? Would furnace be oversized if it cycled off on coldest nights?

    so is the TOTAL OUTPUT CAPACITY of the...
  45. zachhvac, contractor who ran the load calculation...

    zachhvac, contractor who ran the load calculation said house doesn't have duct work & air flow to handle 4 tons worth of air flow of a 90k btu furnace & that's why i need a 70k btu furnace. he also...
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    duct cleaning: is this snake oil?

    1st contractor advised i get ducts cleaned before new furnace & ac installed based on age of house (59 yrs old). 2nd contractor advised get ducts cleaned & run central furnace fan to clear out what...
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    the existing furnance did not run 24/7. my...

    the existing furnance did not run 24/7.

    my 1st question is if the american standard model AUD2B080A9362A is only 64k btu output capacity? i understand that it is a 2 stage single speed 80% afue...
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    so do i understand correctly the american...

    so do i understand correctly the american standard gas furnace i am considering as one option (model AUD2B080A9362A) is a single speed 80% afue 3 ton unit, w/ 80k btu input but ONLY a 63k btu...
  49. so based on the analogy motoguy128 provides the...

    so based on the analogy motoguy128 provides the variable speed furnace will work past it's design limits until the motor seizes up or fails---what good is that when the motor costs more than double...
  50. why is it hvac folks say too many problems w/ vs furnaces?

    hvac salespeople all pushing variable speed 2 stage furnaces but a couple of hvac servicemen tell me they have had to replace too many of the vs furnace motors before they should have failed, and...
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