Strangest HVAC problem ever...hoping someone can help
Tim Dias
last year
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sktn77a
last yearmike_home
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Problems??? with my new HVAC system.
Comments (22)"My gut feeling says there are installation and duct problems which have yet to be addressed." That I can not argue with that :-D I fear that the installer downsized the system without taking into account the lifestyle of the users, they shut off the system, come home and then want it cool in a hurry. (Sounds like me.) It seems like a variable system should be able to do this well and not be oversized when demand is relatively low. Mine does. The OP might, however, need to learn to use the programable thermostat or maybe even a thermostat that can be controlled via a smartphone. "Variable speed furnaces and air handlers normally start up in the low stage for some period of time. In addition if the thermostat is near the set point, the blower may stay in the low stage until the thermostat is satisfied. This is some of the reasons why it takes longer." I agree that they might take longer reach the set point as they approach it because they shift to lower speed, but that would be eliminated by setting the t-stat to 65. Starting up in the low stage should not affect things when you are talking about a couple of hours. That start-up low phase should only be for a few minutes at most. Am I wrong? "I find it hard to believe that the old AC could drop the temperture 12 degrees in 2 hours." It might if the humidity was low enough....See MorePlease help with builder's proposed HVAC setup?
Comments (21)I met with the head of the HVAC company (which by the way does have a good reputation..not some fly by night company..if that matters) yesterday and expressed my concerns. He reassured me that what they were installing would make us happy. Of course it will!! : ) I did mention that when they did the analysis, they didn't consider the likely 2" spray foam, and he agreed that they would need to rerun the data. SIDENOTE: I just got the spray foam cost and now I am thinking I won't be able to do it anyway. So 5 ton may be what I get anyway. I asked about 2 stage and he suggested against it for my situation. Still not sure about the zoning or not. I'm tempted to NOT do it, since the HVAC owner assured me that I'd be happy. He mentioned if not, within the first year, they will come out and make it right. So I was thinking IF I'm not satisfied, within the warranty, I would ask them to come out and make it right. Maybe at that point, it would show that zoning or 2 units WAS indeed necessary. As opposed to doing it upfront. But then I think I may need it anyway b/c my wood fireplace will heat up the 1st floor enough, and the 2nd floor will likely always be cooler. A second zone/thermostat will resolve that. I don't know... This post was edited by lithnights on Wed, Jun 12, 13 at 14:24...See MoreProblems with HVAC in 1958 Cape Cod
Comments (26)"Generally, I am being told that my oil furnace is probably at the end of its life, being at least approx. 25 years old and should consider replacing now. The 2nd contractor that wants to replace existing with 4 ton furnace, states that the current one is not large enough to handle the size of the house. The rest, so far, want to add a separate system for upstairs." ----------- When the cooling A-Coil is set directly on top of the furnace the huge oil furnace heat/exchanger causes a lot of restricted back-pressure leading to a big drop in static pressure which reduces the velocity of airflow. That along with possibly improper duct design & return air filter areas would greatly reduce airflow. I am betting a 60K would heat your hone in that climate. Do your own whole house load-calc: http://www.loadcalc.net/ Or/and, do the floors separate. Print the instructions & follow them; including clicking on thr SIZING LINK when load-calc is satisfactory completed......See MoreHardwood floor installed before HVAC - now problems
Comments (19)Thanks Charles -- I did look at the guidelines that you mentioned. However, it refers to gaps 'at completion' of the job and not within the 1 year warranty period. Everything I've read indicates that installing hardwood without controlling the temp / humidity for what the living conditions will be is a big no no. Re: your comment about the 'difference in moisture content of the wood floor & subfloor' -- if they are both swollen from the high humidity, then they would both shrink under the normal living conditions right? Do they both shrink at the same rate, etc? There are numerous gaps, face checking (cracks on the tops of boards -- some with the grain and some against the grain), and gaps under the baseboards (where I can easily insert a penny). I thought this was a GREAT article that directly discusses the topic of installing with no HVAC: http://www.floordaily.net/floorfocus/challenges_involved_with_installing_hardwood_wood.aspx I noticed many installers recommended waiting or turning down the job if necessary. It sounds like my builder and the installer both made a bad decision. So, isn't this something their insurance would cover? I just want my floor fixed -- not with a band-aid for a short term solution (until the warranty runs out). I just want a good quality floor and to enjoy our new home. Sigh............See MoreCharles Ross Homes
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