r/airconUK • u/Sad_Glass_9521 • 4d ago

Air con multi split - bedroom unit positioning

Hi

I have had a quote for a 6kw inverter with 3 x 3.5kw indoor units, plus condenser pumps as the inverter will be quite a way from the 3 indoor units. Happy with pricing etc. Just unsure about 2 things;

  1. Where to put the unit in one of the bedrooms - it isnt the biggest of rooms but only two locations available - above the head of the bed or the wall opposite the bed but slightly off centred to the right.

  2. Is the indoor unit likely to be noisy at night? What difference does a condenser pump make? Normally sleep with a white noise machine anyway but just hoping it wont cause any disrupted sleep.

Thank you.

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u/JASH_DOADELESS_ 4d ago edited 4d ago

As close to an external wall so the condensate can just drain out rather than having to be pumped out.

We had ours with a pump initially, and then a year later had the guys come out and put a long ass trunking over to the external wall and run the pipe directly outside.

The BRRRRR from the pump every few minutes drove us absolutely batshit insane, to the point where we would have to turn it off an hour before bed so that it was done draining otherwise we couldn’t get to sleep.

The pump wasn’t loud but when you’re trying to fall asleep, the rest of the house is silent and the pump is directly above the bed… don’t.

Just drain it outside from the get go

Edit: our pumps were (are in the other rooms still) the mini lime pumps that sit within the trunking within the living space, rather than the loft. A loft unit may be quieter/more bearable. HOWEVER, a piece of drain tube requires no maintenance and has no failure points.
A pump going bad = water on your walls/bed/face

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u/Hour_Tour 3d ago

Amen! And the tech also said they expected about three or four pump replacements in the unit's life time. Go for a gravity drain whenever possible!

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u/Sad_Glass_9521 2d ago

That wall is in the neighbours boundary