Have you ever thought about changing the central air conditioner?

   / Have you ever thought about changing the central air conditioner? #71  
A mini split is seldom a replacement for central air. Do not make the mistake of doing this.

Central air systems tie into the duct work that go to each room in your house, including bedrooms, bathrooms, basements, on multiple floors. A minisplit has a head on the other side of the wall where it was mounted.

These two things are not the same, and are seldom interchangeable.
Amen to that. We rented a condo in the keys that had mini split heat pumps instead of central air.

You had to make sure and leave every door open inside the place or the closed up room was like a sauna.

It had two units. One in a bedroom and the other in the living room.

We installed a mini split heat pump in our sun room on the last house we had.

It was a great investment since we could let the dogs out there while we were at work, and they could go in and out through the doggy door.

The mini split was replacing a window unit air conditioner.
 
   / Have you ever thought about changing the central air conditioner? #72  
Just received a 24k quote to replace a 12 year old 5 ton Rheem Heat Pump and Air Handler with American Standard…

12 years ago the Rheem cost 13.5k

In 21 years this will be the third new install same Olympia WA home and my only heat pump experience is less than stellar as in 2 strikes now.

Home is all electric… so no gas option.

I’m 800 miles away so options are limited.

The Rheem was always in need of something and the dealer was good about it but sold out to a National Company and customer service went out the window…

In California with my gas furnaces I have some central near a hundred years old and many from the 50’s and 60’s trouble free.

My only central air is a 1993 Carrier and less than a $100 in parts in 30 years.

Heat Pumps promise a lot but come at a high cost… especially for a property that is currently a rental.

Maybe the answer is ditching the Heat Pump and go back to all electric furnace…?

The upstairs electric furnace is vintage 1978 and no issues…

I hear 10 to 15 years is typical heat pump life expectancy :-(
 
Last edited:
   / Have you ever thought about changing the central air conditioner? #73  
Just received a 24k quote to replace a 12 year old 5 ton Rheem Heat Pump and Air Handler with American Standard…

12 years ago the Rheem cost 13.5k

In 21 years this will be the third new install same Olympia WA home and my only heat pump experience is less than stellar as in 2 strikes now.

Home is all electric… so no gas option.

I’m 800 miles away so options are limited.

The Rheem was always in need of something and the dealer was good about it but sold out to a National Company and customer service went out the window…

In California with my gas furnaces I have some central near a hundred years old and many from the 50’s and 60’s trouble free.

My only central air is a 1993 Carrier and less than a $100 in parts in 30 years.

Heat Pumps promise a lot but come at a high cost… especially for a property that is currently a rental.

Maybe the answer is ditching the Heat Pump and go back to all electric furnace…?

The upstairs electric furnace is vintage 1978 and no issues…

I hear 10 to 15 years is typical heat pump life expectancy :-(
But, if you could pay $4000-$5000 to replace it with a complete DIY solution, that 10-15yrs replacement now seems like a bargain..
 
   / Have you ever thought about changing the central air conditioner? #74  
But, if you could pay $4000-$5000 to replace it with a complete DIY solution, that 10-15yrs replacement now seems like a bargain..
Distance is the problem...

I've installed several Tempstar Units in homes that had no previous central air in the 90's and except for the hot attics liked the work.

Maybe A/C is to expensive to justify in Western WA?
 
   / Have you ever thought about changing the central air conditioner? #75  
Distance is the problem...

I've installed several Tempstar Units in homes that had no previous central air in the 90's and except for the hot attics liked the work.

Maybe A/C is to expensive to justify in Western WA?
Not sure of the weather in W. WA, but for the price savings, it would be worth 2 days of driving (round trip) for me. $24k is nuts..
 
   / Have you ever thought about changing the central air conditioner? #76  
This has been my experience in northern Pennsylvania with ducted central A/C and ductless mini split systems. Different climates as well as individual preferences vary, so YMMV.

I considered ducted central air when I was building my house in 1979, until an incident in the office where I worked changed my mind. People started getting sick. When it got severe enough, the board of health was called in. They found the inside of the ductwork was covered with a half inch thick layer of green mold. Contractors were called in to clean & replace parts of it. I almost lost my lunch when one of the workers showed me a section of the duct he had removed.

Yeah, I know. Regular cleaning of the ductwork prevents this, but it was just more maintenance which I was trying to avoid. Instead, I skipped the A/C and installed a whole house fan. Since the nights are cool around here, that worked fine for over 30 years. When my wife developed allergies, we had to close the windows at night and use a window A/C unit.

When I retired in 2003, as a retirement present, I bought a Fujitsu mini split system, consisting of 2 compressors with 2 heads on each. The system worked flawlessly with absolutely 0 maintenance for 20 years.

In 2023, to take advantage of a rebate offer from our local power company, we decided to replace the older, less efficient system with a new mini split system which provides both A/C & heat. Our electric bill was reduced by just under 40% and the rebate program paid for half the installation cost.

At the same time, my sister in law began to have trouble with her 15 year-old ducted central air system. At first, it was just a musty smell but then the compressor quit. The cost to replace the compressor and clean the ducts was almost as much as the cost to put in a new mini split system with the rebate program factored in. She liked ours so much, she decided to switch to the mini split.

Now, a year later, she is very happy she switched. Her new system has 2 compressors with a total of 5 heads. She is better able to adjust temps in the various zones than she was with the old central air.

The only down side to mini splits is the heads can be unsightly in some places. The trick it to place them in out of the way locations such as these:

IMG_005148.jpg
IMG_005149.jpg
IMG_005150.jpg


Some complain about noise but I find it barely noticeable. My SIL says, the noise is about the same as her old system.
 
   / Have you ever thought about changing the central air conditioner?
  • Thread Starter
#77  
Some complain about noise but I find it barely noticeable. My SIL says, the noise is about the same as her old system.
The other reason I am so satisfied to install the mini split AC was because of noise.

It was a nightmare to hear loud noises from the heat pump whenever it turned on which is under the outside of the master bedroom window.

Compare the mini split AC which is 10 times quieter than the heat pump.

No more central AC (heat hump) in my house.😩😩
 
   / Have you ever thought about changing the central air conditioner? #78  
The other reason I am so satisfied to install the mini split AC was because of noise.

It was a nightmare to hear loud noises from the heat pump whenever it turned on which is under the outside of the master bedroom window.

No more central AC (heat hump) in my house.😩😩
Then you're installing the wrong central H.P. Mine is as quiet as any mini split system out there and is ducted . All my duct is insulated outside, not inside
 
   / Have you ever thought about changing the central air conditioner? #79  
Ya, mine is pretty quite as well. 3 ton centrally ducted with an air handler. Outside you barely hear the fan and compressor running, and you can't hear it running inside at all.. and it's attached to the foundation. Though I did mount it on real angle iron brackets with rubber isolator strips (5mm tailgate mat) between the wall and brackets, and isolator feet between the unit and the brackets.

The only vents you hear air from are the 2 closest to the plenum, as is pretty normal. My vents are not insulated as they help with heating/cooling the crawl space.
 
   / Have you ever thought about changing the central air conditioner? #80  
The other reason I am so satisfied to install the mini split AC was because of noise.

It was a nightmare to hear loud noises from the heat pump whenever it turned on which is under the outside of the master bedroom window.

Compare the mini split AC which is 10 times quieter than the heat pump.

No more central AC (heat hump) in my house.😩😩
Out of curiosity, how many indoor ductless heads do you have vs how many outdoor units?
FYI, NEVER place the condensing unit directly under the master bedroom window, even with a mini split ;) Even with a mini split, if you have a short line set run to the indoor head generally over the bed (generally 10' or less), it is possible sometimes to hear the refrigerant moving in the line set.

As Kenmac mentioned, newer condensing units are generally very quiet now in comparison to 10-15 year old models.

Had a issue with my dryer. First up, the thermistor. Nope, that's not it, then went to look for a relay board. What do you know, it appears that relay board is no longer made for that dryer. Thought to myself, well, I think it's about 10 years old, so I guess that might be right. Looked for the invoice, the dryer is only 6 years old! The $650 new dryer was delivered last night. I just know that if I couldn't get a part for my 12 year old HVAC system, I would be pissed, let alone 6 years old. What I can tell you from years of experience working in the HVAC trade, if there is ever a OEM proprietary part that you run the risk of not finding in the US, it's with a ductless mini split system.
 

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