I wish to mount an 25000 btu air-conditioner unit to a wood-frame structure but am very concerned about vibration and drumming sound/effect of the wall negating a good nights sleep.

I was wondering if the good people here could provide some first hand experience to either support my fear or otherwise and/or provide a fix eliminating the noise generated by the vibration prior mounting an air conditioner to a wood-frame structure.

Or might it be better installing a floor-mount unit (wooden floor) on a thick rubber base instead of a wall-mount aircon?

Thanks.

Generally speaking things only vibrate if there is something loose; screws bolts or a large backboard with insufficient fixings.

I wouldnt be concerned at all really.

 

An aircon doesnt vibrate anyway does it.

I wouldnt mount the external box on timber outside though...concrete floor or steel gallows brackets

It sounds like a wall unit not a split system?

The internal compressor is mounted on rubber feet and is really the only part that tends to vibrate. 

A timber frame should be ok, but as for the previous poster I would also go with a metal galvanized bracket due to possible deterioration. 

Edit. Just read your post properly. 

The "floor unit" (compressor/ condenser unit) is usually mounted on rubber feet, but the internal compressor is also mounted on rubber mounts so it won't really matter.

1 hour ago, eyecatcher said:

Generally speaking things only vibrate if there is something loose; screws bolts or a large backboard with insufficient fixings.

I wouldnt be concerned at all really.

 

An aircon doesnt vibrate anyway does it.

I wouldnt mount the external box on timber outside though...concrete floor or steel gallows brackets

All mechanical structures such as motors, fans etc. produce vibrations - it's a frequency thing. The drumming/sound effect is probably much less noticeable  if an aircon mounted on a  masonry structure.

48 minutes ago, sipi said:

It sounds like a wall unit not a split system?

The internal compressor is mounted on rubber feet and is really the only part that tends to vibrate. 

A timber frame should be ok, but as for the previous poster I would also go with a metal galvanized bracket due to possible deterioration. 

Edit. Just read your post properly. 

The "floor unit" (compressor/ condenser unit) is usually mounted on rubber feet, but the internal compressor is also mounted on rubber mounts so it won't really matter.

It's a split system.

I wouldn't mount the outdoor unit on your wooden structure either on a wall or even a floor. I think you are correct in thinking it will flex and amplify the compressor noise.

 

A simple concrete pad is easy and cheap, no danger at all of any humming.

I always use the purpose built powder coated brackets readily available, but that is just habit.

2 hours ago, sipi said:

I always use the purpose built powder coated brackets readily available, but that is just habit.

no brackets needed if Crossy's advice (small concrete pad) is taken.

I find the brackets helps to deter rodents from taking up residence, personal choice.

2 hours ago, sipi said:

I find the brackets helps to deter rodents from taking up residence, personal choice.

the openings of a compressor/condenser unit are not big enough for any rodent to enter. moreover, a small cheap concrete pad does not require any powder coating to prevent corrosion.

I have had two blown up. Left the teeth and spine behind. Not sure if I still have the photos on my phone. Probably not.

Edit. Nope, deleted. I'll photograph the only setup I install when the sun comes up if I remember.

Powder coated brackets up the wall with a rat block on each leg. I learnt the hard (expensive) way.

Double edit. One took out the inverter and another took out a pcb. Not the compressor or conderser fan. Either way it was expensive.

But anyway up to him. Concrete pad might be ok.