-
Carrier 38MAR heat pump for use in a ducted installation? Also, noise levels?
Hi everyone,
I recently moved and am looking to replace an old AC unit with a modern heat pump. Quiet operation is my top concern as the unit will be mounted on an external wall that's immediately outside a screening room office where I will be spending much of my time doing sound-sensitive work. The low frequency humming of my current AC is driving me up a wall.
A company has recommended that I consider getting getting a Carrier 38MAR heat pump due to its low noise rating.
Researching it online, I only see the 38MAR being used in ductless installs.
Has anyone here seen them used well in ducted set-ups?
Also, could anyone attest to their relative sound levels? Apparently the compressor is blanketed?
Any feedback or observations would be greatly, greatly appreciated!
-
-
Define Sound Sensitive.
You're getting into a specialty field!
-
Originally Posted by
pecmsg
Define Sound Sensitive.
You're getting into a specialty field!
Not doing recording work or anything like that, but I'm frequently evaluating films for programming and for everything that I've spent on my home theatre system, I'm looking to avoid hearing distracting background drones and hums.
-
Then move the outside unit and have an exceptional duct system.
-
Originally Posted by
pecmsg
Then move the outside unit and have an exceptional duct system.
That's not an option, unfortunately. I live in an attached townhouse, so the most I would be able to do would be to move the outside until several feet away from the wall.
Have you seen the 38MAR used in ducted installations?
-
Most of the noise you hear inside is air flow related. Trying to push too much air through too small a duct.
Get a static pressure TESP performed on the existing ducts to see what they can handle.
-
Originally Posted by
pecmsg
Most of the noise you hear inside is air flow related. Trying to push too much air through too small a duct.
Get a static pressure TESP performed on the existing ducts to see what they can handle.
The air flow noise is audible but not terrible. The sound I'm concerned with and hoping to avoid in my new system is specifically coming from the outside unit, a loud, fluctuating electric hum.
-
-
https://www.shareddocs.com/hvac/docs...10-1659-01.pdf
Looks like Bryant/Carrier have the same line.
Shows the indoor section that can be used, says a cased coil/furnace or Air ducted Handler if reading it correctly.
Doubt Carrier actually makes that outdoor unit, thinking a rebadged made/assembled 100% in China and exported here?
You stuck on Carrier as there are many side discharge inverter systems out there..
-
Post Likes - 1 Likes, 0 Dislikes
-
Originally Posted by
Bazooka Joe
https://www.shareddocs.com/hvac/docs...10-1659-01.pdf
Looks like Bryant/Carrier have the same line.
Shows the indoor section that can be used, says a cased coil/furnace or Air ducted Handler if reading it correctly.
Doubt Carrier actually makes that outdoor unit, thinking a rebadged made/assembled 100% in China and exported here?
You stuck on Carrier as there are many side discharge inverter systems out there..
Midea rebrand.
Unless they've started importing from the chigo plant they just bought.
-
Post Likes - 2 Likes, 0 Dislikes
-
First have the static pressure measured and the duct system evaluated. This will help evaluate how much air flow can be accommodated without generating noise.
Consider inverter heat pumps and modulating air handlers as they are very quiet. Also very efficient.
*********
https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.
Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/
-
Originally Posted by
kdean1
First have the static pressure measured and the duct system evaluated. This will help evaluate how much air flow can be accommodated without generating noise.
Consider inverter heat pumps and modulating air handlers as they are very quiet. Also very efficient.
I'll definitely have the status pressure measured. Thanks for the tip re: an inverter heat pump. I knew to look for a variable speed air handler, but hadn't been aware of the difference an inverter heat pump can make.
What'd the general consensus on the 25HNB6, noise-wise? Its specs sheet lists a higher decibel-rating than the 38MAR, but it has Carrier's Silencer System II design and a blanket-wrapped compressor. It overall seems like a much more substantial piece of kit.
-
What the heck is the silencer system 2?
A sound blanket? That's it?