Our metal framing system doesn't just replace wood with steel. Our exterior walls are 18 gauge 6" galvanized steel studs at 4 foot OC with 1 1/2" hat channel on the outside of them and then 7/8" hat channel on the inside to make 8 3/8" thick exterior walls.
Originally Posted by efficiency guy
This means there are only small "touch points" where the hat channel touches the studs to keep thermal bridging to an absolute minimum.
Ya the 18 gauge steel studs are for structural support. Is it a metal shell with wood framing on interior? Why 4ft O.C.??? Less thermal bridging I suppose? Metal framing has its downfalls if not done right. Hope yours is being done right so you don't have an enormous energy bill each month.
Hope your marriage survives it!
Originally Posted by jgriggs
A friend told me that this was the closest he came to a divorce.
Life is too short, Behappy!
We have metal framing on the interior as well. The system we used calls for 4 foot OC and there is hat channel running horizontally spaced every two feet on the inside and outside of the studs.
Originally Posted by ZeroTolerance
It provides for a very strong structure and less thermal bridging. The interior studs are 20 gauge at 16" OC. The original "engineered" plans called for 24" OC for interior studs, but my framer said that's too much open space for drywall.
We've heard that quite a lot, but so far it's been really good. The motto has been to expect the unexpected because this is our first rodeo with all this and lots of unexpected stuff has come up.
Originally Posted by behappy
We still have all the inside to finish out, so we'll see how that goes
Ya 24" O.C. interior is too wide for resi use and abuse. Trust me, in construction there will always be unexpected things popping up no matter the project. Ya, your exterior wall setup is a good one especially since its metal and thermal bridging is a big problem in metal framing. As long as everthing is done right you will be very satisfied. If not, your energy bill will become your worst nightmare.
Hoping for some feedback on the 2 suggested systems.
Originally Posted by jgriggs
HVAC pros familiar with humid southern climates would you do it the same way or differently?
Use thicker drywall
24" OC for interior studs, but my framer said that's too much open space for drywall.Use 5/8" vs 1/2" and the spacing is not a problem
Sounds like a sealed/insulated system ass well. My personal preference is to keep the return duct long enough to avoid noise problems and short enough to avoid increasing the need for more fan horsepower than really needed.
Does the main trunk line in 1.5" duct board and then uses the flex duct on the short runs.
Mention that to the installer and he'll understand
You have got to learn from other people's mistakes! Because God knows you don't live long enough to make them all yourself !!!!!!!!
16.2 SEER Rating
even heat on heat strips
Still hoping for comments on the 2 proposed systems I listed above. Also, I had a contractor suggest the following two systems:
3 ton 15seer luxaire heatpump acclamate system OR
3 ton 17.65seer luxaire heatpump acclamate system
These would both have the Acclimate Residential Communicating Control which looks like a really cool thing. Any thoughts on the reliability, functionality, or anything else on these units.
I know posting prices isn't allowed, but am I allowed to ask if it makes sense to go with the second system if it's X amount of dollars more?
I wouldn't do 24"O.C. even with 5/8" to be honest. I could still easily create a hole. That is my only concern with 24" spacing, also less area to hang and mount things such as tvs on walls, etc. Not saying you can't though
Are you using wood framing for the interior?
Zero and genduct, how about your thoughts on the proposed systems. Both of the Lennox systems were suggested by one contractor and both of the Luxaire were suggested by a different one.
I am a huge Lennox fan. I mainly do repairs on commercial RTU's and Refer systems, so for residential installs... I really couldn't tell you. I think all manufacturers now days are close to even on quality of their units. I am sure many will disagree with me on this statement and I might possibly even get stoned.
I will tell you one thing... I am not a fan of goodman lol (even though that isn't one of the systems you listed)
NM about the wood framing on the interior as I saw you mentioned that in an earlier post
I think the Luxaire guy is coming closer to the size you need then the lennox guy.
How long do you think your electric rate will remain at its current rate? If you think it will go up soon, and continue to increase, then the higher SEER unit makes sense. If you think it will remain at or close to its current rate, then the 15 SEER makes sense.
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