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Thinking about installing AC, tax breaks?

38,252 5,374 May 16, 2023 at 05:15 PM
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Long story short, half of my house doesn't have AC and that includes 4 of the bedrooms. I'm considering installing a ductless solution but it's pricey - about $22k for an LG system (also functions as an air source heat pump).

There are a few breaks though - the utility offers a $1k rebate.

I'm looking into state (CT) and federal tax breaks - am I looking at it correct that for the fed, the rebate is 30% up to $2k? Are there income limits?

The state has its own rebate - $1k per ton, which would be $4k for this install.

Its important to understand the credits ahead of time as they comprise a large part of the cost - $6k in credits is over 25% of the cost of the install.
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Dr. J Pro
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> bubble2 25 Posts
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potatoe
05-16-2023 at 08:05 PM.
05-16-2023 at 08:05 PM.
Quote from Dr. J :
Long story short, half of my house doesn't have AC and that includes 4 of the bedrooms. I'm considering installing a ductless solution but it's pricey - about $22k for an LG system (also functions as an air source heat pump).

There are a few breaks though - the utility offers a $1k rebate.

I'm looking into state (CT) and federal tax breaks - am I looking at it correct that for the fed, the rebate is 30% up to $2k? Are there income limits?

The state has its own rebate - $1k per ton, which would be $4k for this install.

Its important to understand the credits ahead of time as they comprise a large part of the cost - $6k in credits is over 25% of the cost of the install.
If you can wait til later this year, there will be some incredible incentives. Especially if you make under 150% of your areas median income.
For example:
https://www.trane.com/residential...able-hvac/
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komondor
05-16-2023 at 09:48 PM.
05-16-2023 at 09:48 PM.
Make sure you check on the sites to see what qualifies we went with a high efficiency dual stage furnace
but single stage AC as it made no sense for the AC.

If you get a split system make sure the company doing the install does a lot of them they can be tricky. We installed a 3 unit split in my daughter's condo and she loves it.
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Dr. J
05-17-2023 at 05:50 AM.
05-17-2023 at 05:50 AM.
Quote from potatoe :
If you can wait til later this year, there will be some incredible incentives. Especially if you make under 150% of your areas median income.
For example:
https://www.trane.com/residential...able-hvac/
Yeah that's not me. That's why I asked about income limits on the fed rebates in particular.


Quote from komondor :
Make sure you check on the sites to see what qualifies we went with a high efficiency dual stage furnace
but single stage AC as it made no sense for the AC.

If you get a split system make sure the company doing the install does a lot of them they can be tricky. We installed a 3 unit split in my daughter's condo and she loves it.
We have a different minisplit system on the "new" side of the house. Previous owners installed it, we were told it was basically just to help sell the place (neighbors told us this). That system covers basically the first floor, the inlaw suite and the MBR. The other "half" of the house is basically just upstairs, the other 4 bedrooms. It can get uncomfortable over there in the heat of the summer.
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komondor
05-17-2023 at 07:02 AM.
05-17-2023 at 07:02 AM.
Does the other part have AC if not then it might make sense to put in 2 minisplits we used the Mitsubishi ceiling mounted cassette and you do not see anything

Like this system with the remotes it works great!//
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fintlewoodlewix
05-17-2023 at 09:51 AM.
05-17-2023 at 09:51 AM.
I like that central air circulates air throughout the home. Worth considering.

If you want to save money, consider installing an attic fan and attic insulation first, and maybe a whole house fan. We have insulation and central air. I put a fan in to exhaust the heat from the attic. The fan runs many hours, which takes some power, but it keeps the house much more pleasant throughout the day. I need to do the same thing for my office, since in the evening, the heat in the attic radiates downward.
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Dr. J
05-24-2023 at 07:13 AM.
05-24-2023 at 07:13 AM.
Quote from komondor :
Does the other part have AC if not then it might make sense to put in 2 minisplits we used the Mitsubishi ceiling mounted cassette and you do not see anything

Like this system with the remotes it works great!//
I don't quite understand your question. There are 2 options:

- minisplit in each room - so a larger indoor unit, and a compressor outside.
- ducted - basically the evaporator is in the attic and ducts are run to each room. Compressor is still outside

Ducted is $2.5k more than ductless, and that's because of the ductwork involved ($5k IIRC). Ductless is nice because it allows each room to be fine tuned, but the units are larger and on the outside of the home, you need multiple routes for linesets and drains.

Here are the specific units: LG Red ducted [lghvac.com]

And the specific costs: ductless $21263 and ducted $23607


Quote from fintlewoodlewix :
I like that central air circulates air throughout the home. Worth considering.

If you want to save money, consider installing an attic fan and attic insulation first, and maybe a whole house fan. We have insulation and central air. I put a fan in to exhaust the heat from the attic. The fan runs many hours, which takes some power, but it keeps the house much more pleasant throughout the day. I need to do the same thing for my office, since in the evening, the heat in the attic radiates downward.
I already have 2 forced air vents in the attic, they are on a tstat. The fans existed when I bought the home but one was bound up (bad) and the other was on a physical switch (WTF?). So now they come on automatically. As far as insulation is concerned, it seems to be blown in fiberglass. It's in my plan to put down more batting this fall, when it's not so hot to work up there.

I love the idea of a whole house fan, however that requires opening windows and such for makeup air and it's just not practical for our family.
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Last edited by Dr. J May 24, 2023 at 07:16 AM.
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Guzzardo
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fintlewoodlewix
05-24-2023 at 08:58 AM.
05-24-2023 at 08:58 AM.
Quote from Dr. J :
I don't quite understand your question. There are 2 options:

- minisplit in each room - so a larger indoor unit, and a compressor outside.
- ducted - basically the evaporator is in the attic and ducts are run to each room. Compressor is still outside

Ducted is $2.5k more than ductless, and that's because of the ductwork involved ($5k IIRC). Ductless is nice because it allows each room to be fine tuned, but the units are larger and on the outside of the home, you need multiple routes for linesets and drains.

Here are the specific units: LG Red ducted [lghvac.com]

And the specific costs: ductless $21263 and ducted $23607




I already have 2 forced air vents in the attic, they are on a tstat. The fans existed when I bought the home but one was bound up (bad) and the other was on a physical switch (WTF?). So now they come on automatically. As far as insulation is concerned, it seems to be blown in fiberglass. It's in my plan to put down more batting this fall, when it's not so hot to work up there.

I love the idea of a whole house fan, however that requires opening windows and such for makeup air and it's just not practical for our family.
If you already have blown in, I doubt you will get much with added batting. The difference in price is pretty between the two quotes is small, so I would just get the system you prefer. There are more filters to deal with in a minisplit, but if you're usually not using some rooms of the house, you can leave those branches off to save energy. You could have zones installed or just close vents on central air. Central is probably a bit quieter in many sections of the house, since you won't have a fan in each room. Central also allows putting multiple vents into a room, so air distribution is more even. Our bedrooms tend to have two or more vents. Bathrooms get away with one. Hmm... I'm more and more convinced of central air.
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> bubble2 38,252 Posts
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Dr. J
05-24-2023 at 09:52 AM.
05-24-2023 at 09:52 AM.
Quote from fintlewoodlewix :
If you already have blown in, I doubt you will get much with added batting. The difference in price is pretty between the two quotes is small, so I would just get the system you prefer. There are more filters to deal with in a minisplit, but if you're usually not using some rooms of the house, you can leave those branches off to save energy. You could have zones installed or just close vents on central air. Central is probably a bit quieter in many sections of the house, since you won't have a fan in each room. Central also allows putting multiple vents into a room, so air distribution is more even. Our bedrooms tend to have two or more vents. Bathrooms get away with one. Hmm... I'm more and more convinced of central air.
The insulation only goes to the top of the rafters. Looks like the current R value is in the 30's. I'll add batting (another 30 or so). I've already gone through and sealed can lights and such with spray foam.
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fintlewoodlewix
05-24-2023 at 10:13 AM.
05-24-2023 at 10:13 AM.
Quote from Dr. J :
The insulation only goes to the top of the rafters. Looks like the current R value is in the 30's. I'll add batting (another 30 or so). I've already gone through and sealed can lights and such with spray foam.
Top of the rafters is normal insulation. Efficiency is great, but eventually it's a waste of money. The value probably depends on where you live. To get great gains, we'd have to block off inside the walls to stop migration of air into the attic. don't forget insulated power plugs to stop air movement. And when all is said and done, you still need outside air some or you'll get indoor air quality issues.
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Dr. J
05-24-2023 at 11:00 AM.
05-24-2023 at 11:00 AM.
Quote from fintlewoodlewix :
Top of the rafters is normal insulation. Efficiency is great, but eventually it's a waste of money. The value probably depends on where you live. To get great gains, we'd have to block off inside the walls to stop migration of air into the attic. don't forget insulated power plugs to stop air movement. And when all is said and done, you still need outside air some or you'll get indoor air quality issues.

Yeah well I can only do what I can do. In my old home, I did a 2-3 month rehab of the attic which I ultimately added blown cellulose on top of the batting that existed, including spray foam and all sorts of things. I don't want to go that far in this home though.
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fintlewoodlewix
05-24-2023 at 02:02 PM.
05-24-2023 at 02:02 PM.
Quote from Dr. J :
Yeah well I can only do what I can do. In my old home, I did a 2-3 month rehab of the attic which I ultimately added blown cellulose on top of the batting that existed, including spray foam and all sorts of things. I don't want to go that far in this home though.
See, this is the issue. Are you going to stay for 10+ years? Worth it. 5? Eh...

All kinds of projects are no longer happening around here as I see <5 years before we move.
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Dr. J
05-25-2023 at 05:40 AM.
05-25-2023 at 05:40 AM.
Quote from fintlewoodlewix :
See, this is the issue. Are you going to stay for 10+ years? Worth it. 5? Eh...

All kinds of projects are no longer happening around here as I see <5 years before we move.

I am estimating around 15 years.
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Guzzardo
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fintlewoodlewix
05-25-2023 at 11:09 AM.
05-25-2023 at 11:09 AM.
Quote from Dr. J :
I am estimating around 15 years.
Go nuts!
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