Single Room Heat Recover Fans

[ScottishGasMan]

Wandering if you chaps are being asked to wire them up if you've seen many makes? I see the Vent Axia ones can go through a wall 460mm deep,

wandering if any of you know of one that can go through a thicker wall such as solid sandstone (1900's house)?

 

[ericmark]

I assume you mean something like this

looking at the write ups it would seem these are two speed and very little anyone would likely get wrong with wiring however they rely on air in one direction forcing air in the other direction where as the full size systems the fans work in both directions.

So to work the room needs to be reasonable sealed and have no open flue devices where with the larger versions it would work in nearly any room. And it would seem designed for a wall of no more then 318mm. However the advert states:-
Accessories

At this time we recommend buying the ducting and grills from your local ventilation supplier, although we sell flexible ducting this is not recommended as it can restrict airflow over distance. Spiral duct or semi flexible duct should be used.

Which makes one think it is possible to extend their range.

I had considered one for my own house but decided since house is open plan they are not suitable.

 

[ban-all-sheds]

That section looks so much like standard, (one could justifiably say bog standard), 110mm PVC drainage pipe....

 

[Lectrician]

It's not though, it's a pipe within a pipe.

 

[ericmark]

Yes the pipe is the heat exchanger so to extend would require the in and out air to be kept separate.

The problem is if the room has any other ventilation then it will not work. With the standard unit

you have two fans one in and one out so it will exchange the heat but the one built into the pipe only has a single fan.

They are not all the same

and

show variations on the same idea and because the one I looked into had a single fan does not mean they all have a single fan.

The Vent-Axia Lo-Carbon Tempra Single Room Heat Recovery Unit does have two lengths of pipe but is more expensive. But the big problem is matching unit to the house.

I have a open plan house and upstairs gets too hot so a heat recovery unit taking air from upstairs and replacing it down stairs is what I need in my house.

Internet is the problem before internet one could actually see the product but today the shops which sold items like this have closed so your left with distant buying unseen items and hoping they work in your house.

My house like many in the late 70's and early 80's is poorly designed. It has a central gas fire which should have had a underfloor duct to bring the combustion air into the room close to the fire but this does not exist. So the house relies on poor fitting doors and windows to get the combustion air. My parents house built in 1954 has vents throughout the house with an aluminium shutter to open or close them but these are missing from my house. My sons ex-council house also had the vents but they were filled with expanding foam. My first house had hot air central heating and there were vents everywhere to ensure the air could circulate.

My point is every house is different and there is no one size fits all. Fit a vented tumble drier or a heater with an open flue and the single fan heat exchanger will fail. Even the gap left under the bathroom door will mess them up rooms need to be sealed units.

When I read open flue my first thoughts was my fire has the flue completely enclosed that's not an open flue but I was wrong. Open flue refers to drawing combustion air from the room. In other words anything which is not a balanced flue.

 

[JoeAfi]

Hi at all,

my stephfather has installed a single room heat recovery system, which works wireless. He told me, they have a good functionallity, but i want ask also some other people. Do you have experience with the "Ambientika Wireless by Suedwind" ? thanks


Italy

 

[Taylortwocities]

Dear Joe.

Questions for YOU

1. Why have you resurrected an old thread from last year? Your question has nothing to do with the old one. Start a new topic of your own.
2. Your flag suggests that you are not in the UK. The product you are asking about is not even a UK product.. Maybe you should start a new thread in the Electrics Outside the UK forum?

 

[Nozzle]

A classic case of spam

Nozzle

 

[ericmark]

electronically commutated motor (brushless, approximately 6.9W)

I know you can transmit power with radio waves, Nikola Tesla did some experiments with it some 80 years ago. But I think you will find the unit is not wireless, although it may have some wireless control system.

 

[ban-all-sheds]

A wireless motor part:

 

[Nozzle]

It's squrrel cage motor (induction) - millions if not billions of brushless "wireless" motors in service worldwide

 

[ban-all-sheds]

No - it's a part of a motor with no wires at all.