Fitted Air conditioning

Fitted Air conditioning

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Discussion

SmoothCriminal

3,636 posts

166 months

Saturday 8th August 2020
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Anyone know the difference between those wall mounted units and the square sunken ceiling ones you see in shops and restaurants?.

guindilias

5,070 posts

87 months

Sunday 9th August 2020
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The ones you see in shops and offices etc. are cassette units, they are used for suspended ceilings. Most of them are ceiling tile size, 600mm x 600mm - intended as a ceiling tile replacement.

Pheo

2,846 posts

169 months

Sunday 9th August 2020
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One thing I always find annoying / awkward is that the wall units for inside are always long and thin; I appreciate its for a cylindrical fan, but this means you need a very specific size of wall. Makes it hard to place them.

So

16,725 posts

137 months

Sunday 9th August 2020
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Ours have been a god send.

Well worth the money.

Howard-

4,518 posts

169 months

Sunday 9th August 2020
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I'm considering a split unit for upstairs.

Do the condensers take the power from the indoor unit, or vice versa?

JerryDXB

262 posts

66 months

Sunday 9th August 2020
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We’ve just had a couple of the Daikin units mentioned by Robertos88 installed at our place. One condenser on a flat roof and then 2 units inside, 1 for the master bedroom and 1 for the hallway. Having lived in the Middle East for the last 15 years (where cheap Chinese crap gets bolted directly to the concrete roof) I was very concerned about noise and vibration from something mounted to the roof just above our bedroom. The installer took our concerns into account and moved the external unit to the other side of the house above the family bathroom. They also mounted the unit on a rubber base made from recycled tyres. They probably didn’t need to move it as it cannot be heard inside. The internal units are super quiet and have made a huge difference. I’d highly recommend, some pics ...








thebraketester

11,314 posts

105 months

Sunday 9th August 2020
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Howard- said:
I'm considering a split unit for upstairs.

Do the condensers take the power from the indoor unit, or vice versa?
Other way round. You power the external, and the internal unit takes its power from that.

SmoothCriminal

3,636 posts

166 months

Sunday 9th August 2020
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guindilias thanks for that.

How do they run the pipes to the internal units? Are we talking about under floorboards through the loft.

Also I suppose winter time is the best to get installed as I'm sure prices are quite steep this time of year.

guindilias

5,070 posts

87 months

Sunday 9th August 2020
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Through the wall behind the indoor unit is best, but if that's not an option due to the placement of the outside unit then they can be run through the loft, pretty much anywhere you want.
Most split kits will specify a maximum length of pipe run - over this the installer will need to add more refrigerant, and that plus the extra dicking about to get the ppes to the condenser will obviously cost more.
The more expensive units like Toshiba, Daikin, Mitsubishi etc. will often run up to 30m without any additional refrigerant needed, the cheap TCL, ElectriQ type ones will normally want extra refrigerant if you go over 5 or 10 meters, but if you can stick to the 5 or 10m max then they will be cheaper to install - they usually come with a pre-flared pipe kit which makes it faster.

And yes, this time of year you will be bent over on installation cost - particularly if you live in the south! I don't advertise, I just get jobs by word of mouth as this isn't my main job, just something to keep me busy when I'm bored - my phone has hardly stopped all weekend, and it's only been 21 degrees where I live!

Pheo

2,846 posts

169 months

Sunday 9th August 2020
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Probably worth mentioning I believe they need a condensate drain so if that pipe must go up before exiting then you’ll need a condensate pump I believe eg if you take the loft route

MOBB

2,698 posts

94 months

Sunday 9th August 2020
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^ yes that’s right, mine goes up into the loft and has had to have a pump. Annoying little noise it makes for 5 secs too :-(

guindilias

5,070 posts

87 months

Sunday 9th August 2020
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You can pick up a self priming pump and stick it in the loft so you don't hear it - less than £100 for the pump, and easy to fit yourself.
I never put pumps at the indoor unit, they do make an annoying noise which defeats the point of the super-quiet wall units all the manufacturers aim to produce.

Pheo

2,846 posts

169 months

Sunday 9th August 2020
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guindilias said:
You can pick up a self priming pump and stick it in the loft so you don't hear it - less than £100 for the pump, and easy to fit yourself.
I never put pumps at the indoor unit, they do make an annoying noise which defeats the point of the super-quiet wall units all the manufacturers aim to produce.
Ah nice didn’t realise you could do that. Will stop worrying about that then!

I must admit I am sorely tempted right now. I wonder if two units could do upstairs and downstairs respectively to a reasonable extent rather than needing to put them on the bedrooms themselves.

(Currently sitting in extension at 28c)

irocfan

27,425 posts

157 months

Sunday 9th August 2020
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Now I just need at find a reputable A/C specialist close to me!


thebraketester

11,314 posts

105 months

Sunday 9th August 2020
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irocfan said:
Now I just need at find a reputable A/C specialist close to me!
Google Temcon Air Conditioning.... Daniel did ours and it was very good price-wise and he did a great job.

emperorburger

860 posts

33 months

Sunday 9th August 2020
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Pheo said:
Ah nice didn’t realise you could do that. Will stop worrying about that then!

I must admit I am sorely tempted right now. I wonder if two units could do upstairs and downstairs respectively to a reasonable extent rather than needing to put them on the bedrooms themselves.

(Currently sitting in extension at 28c)
General wisdom is to put an indoor unit directly in each room you want to cool. A single indoor unit won't cool multiple rooms on the same floor.

guindilias

5,070 posts

87 months

Sunday 9th August 2020
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Yeah, unless you go for a ducted system, which is fine for upstairs (the main unit can go in the loft and be ducted to each room), but won't do downstairs - a wall mount in every room you want to cool.
Otherwise it's a bit like having the window open and the air con on. A multi split will do what you want - one outside condensor and wall mounts in each room.

8-P

2,667 posts

227 months

Sunday 9th August 2020
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Fella over the road from me did his house last year, most rooms.

Are they noisy enough to ps off a neighbour?

SmoothCriminal

3,636 posts

166 months

Sunday 9th August 2020
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guindilias would it be possible to use the cassette types in a residential property for down stairs?

I have a a standard semi and would have the external unit mounted on the extension flat roof would it then be possible to run the pipes through the down stairs ceiling to two cassettes in my open plan kitchen living then 2 seperate pipes upstairs to two bedrooms but was thinking of wall mounted for those? Can you mix and match or need all the same and also would that need two condensers

guindilias

5,070 posts

87 months

Sunday 9th August 2020
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SmoothCriminal said:
guindilias would it be possible to use the cassette types in a residential property for down stairs?

I have a a standard semi and would have the external unit mounted on the extension flat roof would it then be possible to run the pipes through the down stairs ceiling to two cassettes in my open plan kitchen living then 2 seperate pipes upstairs to two bedrooms but was thinking of wall mounted for those? Can you mix and match or need all the same and also would that need two condensers
You can mix and match, but a cassette is very unlikely to fit unless your ceiling joists are more than 600mm apart, and 300mm deep - which I doubt!