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Started By
Message
New construction AC suggestions
Posted on 5/10/14 at 10:22 am
Posted on 5/10/14 at 10:22 am
3,100 sq ft heated total
450 upstairs
(2) 3.5 ton for down stairs, 1.5 ton for upstairs bonus room
5 ton down left side and upstairs bonus room, 3 ton right side
5 ton down stairs , 1.5 ton for upstairs
Price range is from 8500-10k on three options.
Any pros on here with some knowledge?
TIA
450 upstairs
(2) 3.5 ton for down stairs, 1.5 ton for upstairs bonus room
5 ton down left side and upstairs bonus room, 3 ton right side
5 ton down stairs , 1.5 ton for upstairs
Price range is from 8500-10k on three options.
Any pros on here with some knowledge?
TIA
7
Posted on 5/10/14 at 10:25 am to TIGRLEE
1 ton per 500 sq ft is all you need. Anything else is a waste.
What sort of insulation? Foam, fiberglass, cellulose, batting?
What sort of insulation? Foam, fiberglass, cellulose, batting?
Posted on 5/10/14 at 10:27 am to stout
Foam
Posted on 5/10/14 at 10:28 am to stout
Depends on the insulation. I have about 300 more total sq and I have a 3 ton system downstairs and a 2 ton system up (18 seer). And I would have gone 1.5 for upstairs but it wasn't available in a 1/2 ton interval for 18 SEER. FYI the house is foamed.
This post was edited on 5/10/14 at 11:37 pm
Posted on 5/10/14 at 10:29 am to TIGRLEE
You can usually cut your required A/C size down a ton or so with foam.
This post was edited on 5/10/14 at 10:31 am
Posted on 5/10/14 at 10:52 am to stout
If that's the case the 5 and 1.5 would suffice.
Posted on 5/10/14 at 10:55 am to TIGRLEE
You don't need the 5 downstairs. Way too much especially with foam.
Posted on 5/10/14 at 11:01 am to stout
So the (2)3.5s best bet?
Two thermostats so you can obv set accordingly.
I've had two guys tell me they'd go that route.
It's most expensive but prob most efficient.
Two thermostats so you can obv set accordingly.
I've had two guys tell me they'd go that route.
It's most expensive but prob most efficient.
Posted on 5/10/14 at 11:04 am to stout
When I had a house it was over 3000 sq.ft. and I had a 3 and 2.5. The A/C was split with the 2.5 supplying the 4 Bedrooms and this was always ok. In the other part of the House had a Big Great Room with a Vaulted Ceiling and a very large Dining Area, Kitchen, and Small Dining Area off the Kitchen. The 3 just never seemed to be enough on hot days. I had changed everything out once when the old systems was about 20 years old and the 3 should have been a 4 or at least a 3.5. I had 3 bids at the time and one of the bidders told me that and I should have gone with him. I went with York at the time it and was good. Good Luck!!!
Posted on 5/10/14 at 11:04 am to TIGRLEE
ETA: I read that wrong
This post was edited on 5/10/14 at 11:08 am
Posted on 5/10/14 at 11:07 am to stout
No reason to get snippy, I didn't come up with theses options, AC guy did.
I wasn't sure what was best, that's why I asked... I have no preconceived notions of what best.
Thanks for advice though.
I wasn't sure what was best, that's why I asked... I have no preconceived notions of what best.
Thanks for advice though.
Posted on 5/10/14 at 11:08 am to stout
quote:
1 ton per 500 sq ft is all you need.
For residential design, this is always the standard I've followed.
This post was edited on 5/10/14 at 11:09 am
Posted on 5/10/14 at 11:08 am to TIGRLEE
Read my edit. I read it wrong.
My bad
2 3.5 tons would probably be sufficient.
My bad
2 3.5 tons would probably be sufficient.
This post was edited on 5/10/14 at 11:09 am
Posted on 5/10/14 at 11:09 am to stout
Thanks bro
Posted on 5/10/14 at 11:11 am to TIGRLEE
Without getting into the sizing, multiple split units is my recommendation. I have one 5 ton for one story, and hate it. Wish I would have split it.
Posted on 5/10/14 at 11:15 am to TIGRLEE
Don't let them place you ducts or unit in the attic where it can super great it.
Posted on 5/10/14 at 11:17 am to BruslyTiger
Also make them put the ducts at the back of the rooms so the air doesn't just go straight out of the room to the return air.
I have seen A/C guys do this to save on duct work and you will end up with a room you can never cool correctly.
I have seen A/C guys do this to save on duct work and you will end up with a room you can never cool correctly.
Posted on 5/10/14 at 11:19 am to stout
quote:
1 ton per 500 sq ft is all you need. Anything else is a waste.
What sort of insulation? Foam, fiberglass, cellulose, batting?
This but I have and addition that the 5 ton unit just wasn't getting to, so I got a used Mr. Slim system and I like that. So now finally my game room and laundry room aren't hot as shite.
Posted on 5/10/14 at 11:29 am to TIGRLEE
If your ac guy is using that much tonnage for foam do not use him hire some one that knows what they are doing!
Posted on 5/10/14 at 11:43 am to BruslyTiger
quote:
ducts or unit in the attic
I want to re-do my duscts as well.
I have celluose insulation between the ceiling and attic. Then plywood, then not a damn thing between the OSB from the roof and the attic. It's like 120* in there, and my ducts run up there but in the cellulose.
Foam is just so expensive, and I'm a DIY type, I hate paying people to do something on the house.
I was looking at the foil insulation and may do that.
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