central Ac unit

7 years ago

last modified: 7 years ago

We are currently having work done on our home we have dual zone AC units that were placed on old pavers we already had. My question is should the new units be placed on a concrete slab? Is that how it is usually done? The units are on pavers on dirt. They are uneven and I feel will become more uneven as time goes by and the dirt moves. Any advice will be greatly appreciated. TIA

Featured Answer

cat_ky

7 years ago

Usually the company that you buy your equipment from, have the concrete slabs to put the new units on, if they are needed. I would talk to them about it. Both units we have had installed, in two separate houses, and two different companies, the company has brought the preformed slab in the correct size with them.

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Comments (7)

branson4020
7 years ago
A slab can't hurt.
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tigerdunes
7 years ago
last modified: 7 years ago
depending on climate including snow, nothing wrong with reusing pavers as long as they are properly leveled...if not that should be corrected now not later...

TD
Sammy
7 years ago
What do the installation instructions from the manufacturer say?
BT
7 years ago
last modified: 7 years ago

I would add the feet
sktn77a
7 years ago
If that's a new installation call the company back and let them know that the units need to be level (did they re-use the slabs from the old condensers). It's not a simple job to re-do the slab/pavers - the units must be pumped down, disconnected, and removed before they can get at the slabs. So you can expect some resistance. They may be able to shim the units level, depending on the way the condenser body bottom is configured. Pavers and/or synthetic slabs are pretty common these days and are fine if done properly.
mike_home
7 years ago
These don't appear to be new condensers in the picture. The condensers would have to be disconnected if you are going to do anything to level the area. I don't recommend doing that. Depending how old they are you will probably create a refrigerant leak and need a costly repair.

If you are getting new condensers then a concrete pad would be the best option. The problem is the typical HVAC installer doesn't know how to install concrete an is unlikely to hire someone to do it. The ground seems to be a hard red clay. I suggest spreading some stone duct to make the area level and then installing a quality condenser pad on top of it. That is how my condensers were installed 10 years ago and so far there has been no issues.