I'm Kevin and I live in S/W Missouri. House is a 1985 1.5 story aprox 1750sf, and has not so good windows, and no vapor sheeting, and not too good batten insulation. 2 B/R up with 1 full bath[300sf+/-], so only 3 vents up there, all under a 44square roof.
I'm a Cosmetic Engineer and have to deal with with +/- .002 by HAND with air grinders ect in my job, and love to build Pontiac engines! Been doing both for 30 yrs. TBH i'm a big Mike Holmes fan["Glue it and screw it!, Do it right ALWAYS!], so mabey you can understand why I may be just too picky.
To start off the old furnance blew the exchanger, so we decided to see about a total system since it was 20+ yrs. old.
First contact kept fumbling about when I kept inquiring about callbacks[about 10%] failures ect, and then about which brand's and that made me uneasy. Come to learn he'd stated he;'d only been doing it for about 5 yrs.
Second tech [recomended from a friend [w+/- 30 yrs exp.] came out, was easy to awnser my questions, and indead was a nice guy, but more imporntant to me was he'd listen and give me straight awnsers.
He did a quick lookover and looked over some chart [similar to a slide rule?], then after about 15 min gave us a sheet with 4 price sets.
After the sticker shock we explained that we had x amount to spend, which was just under his lowest price.
The old unit was a 3.5 ton Arcoair and so we inquired about staying with same size[3of4 prices were 3.5] We made it clear that the old unit would litterly run 20 hrs a day from May thru Oct.
He advised that the "new" units were far more efficiant, and that it should be fine. We asked at least 4 times about using a 4 ton setup, and I did voice my concern about having a high "heatload" home.[Always hot up, and cold down] But in fairness the chart's I seen on the WWW show that a 3-3.5 ton is recomended for this "location"
So after all the installing, we indeed seen an increase in airflow, but first issue was that it wasn't getting very cool inside, the ducts under the house were sweating real bad and was still running about 15 hrs. day, even on an 80*OT.[Therm set to 73*
He reduced the blower to medium. I called him 3 hrs later, and told him that the vents were sweating and the house was getting hotter, so he came back over that nite and went back to high. He was having the new plenium made for the air intake for the handler, so after getting installed it helped airflow alot, but things really got bad after that.
We had a couple days that got to 92 O/T and the unit didnt go off for almost 30 hrs!, twice that week it happended!
thing is that in the beginning we first noticed that an extiorer door started sticking, but now after the 2 events, our fireplace mantle has warped[about 1 in] and is pulling apart from itself!!
I have been informed from a couple sorces that it's pulling all the moisture out of the inside of the house. Turns out that some of my flex duct under is loading up with water also!
After talking with the Mfg, we were advised to get a second opionon, but they[mfg/3rd tech] felt that the unit was really undersized.
We called him yesterday and advised him that we "want a 4 ton unit put in, that we need to nip this now before it gets too hot"!
So are we on the right track to get a 4 ton unit?
Thanks for any input.