Kair Heat Recovery Extractor Fan - 12VAC SELV - Humidistat

Can this unit be used to extract heat from one room to another.

Whats the running cost daily

this product mentions filters where are the filters located how often are they changed

Hi, this looks like the inputs and the outputs are very close together? It looks like the outputted air is just sucked straight back in. Is there some ducting to seperate incoming and outgoing air?

In our new kitchen we want a heat recovery unit where the air has to travel 4-5 metres to get outside. Does Kair have a product for this?

A few questions - 1. Does this require an electrician to install or do you just plug it in? 2. You say the filters can be cleaned? 3. It is designed to be continuously running but can that be overridden? Thanks

Can this unit be ceiling mounted and used with aluminium flexi duct as I have no outside wall to drill thro. Thanks

Hi can you advise what might be the best option for installing into a bathroom with no external wall access, please? The ducting would run via floor void to outside via ducting, a distance on around 5 metres. Thanks in advance.

Hi, I have a large open conservatory off the kitchen which suffers extreme condensation. In fact its so bad it drips from the apex leaving a trail of water on the floor and furniture etc. The whole area has underfloor electric heating. Would this unit stop this, or at least help as we are considering replacing the roof with a solid tiled one because of this. Thanks.

Hi, Is a unit available for an internal room that can be ducted 3.75m to an external wall? The room is used by 2 people and building control requires 12 l/s/p air supply and balanced extract?

We have bought a small, terraced house with an open fire in the living room. There is damp, which is being sorted at the moment, but the chimney surveyor also said that there should be a vent to bring in air from outside, for safety reasons (and compliance with Building Regs). Would this fan be suitable and effective? Also, the wall is a non-cavity, 9-inch brick wall.

I have a projector with effectively a sealed room to achieve blackout conditions. It is suffering from poor ventilation; the air quickly gets stale though there are no condensation/humidity problems. Would this type of unit work well, and if so what are the noise levels like? If not can you recommend any other suitable product. Thanks

The unit is described as 12 volt AC, can it be run on 12 volt DC power? In a vehicle? Some long term van dwellers, (camper van) have a need for such a unit.

Since having a flueless gas fire fitted with a 6" air vent fitted to outside wall, which is required. We have been having condensation and mould issues, which I believe is the cold air hitting the hot air that has caused this to happen....Please can you advise me on the best solution. Thank you

Looking at the picture is there a control unit that must be fixed to the ceiling. What is the night sensor, can it stop the unit working at night. I live at postcode PA37 1RL on main land Britain, is there an excess delivery cost.

Hello, I am from Cyprus and in the hot summer my garage room gets very hot and a lot moisture is building up because in the garage i also have the hetpump that cools a boiler in there for the funcoils in the house. Can this ventilation work in this situation to extract out all that heat from the garage?

Would your product be suitable for a conservatory. 15ft /10ft

How does the extension kit work, would I be able to easily fit this to the unit, do I need glue. What is the cost of postage.

We have moved into a flat which contains one of your extractor fans in the bedroom. We are wondering what this is for. Do you have any record regarding the initial installation? Was it ordered by Torsten Boehler and what was the date of the installation?

We are seeking an extractor that will clear cigarette smoke and cooking smells from our (relatively small) kitchen without blasting out all the room's heat. Is this unit for us?

I have no experience of local builders or electricians. Do you keep any details of tradesmen in The Wyre Forest (Kidderminster/Bewdley/Stourport) that have installed and are familiar with the HREF ?

We have a concern regarding the booster function of the fan as it doesn't appear to be coming on when the humidity is high e.g. after a shower, although the humidity control has been set to 20% (the fan is situated in the bathroom). It does however come on when direct sunlight is shining into the bathroom. The fan also seems to be blowing inwards to the main central duct, is this the way it is meant to work. Many thanks.

Hello, I realise it is a few months since my order, but can I return one of the units? I thought I needed two, but it turns out I only need one. The unit is unopened in complete as-new condition. Thank you William

I purchased an apartment for rent 3 months ago and the tenant has complained about mould forming in the bedrooms and Kitchen. There is an extract fan in the bathroom with a humidity stat and a cooker hood in the kitchen. There are air bricks in lounge and one of the bedrooms. Do you think that adding one of you heat recovery units to the bedroom wood solve the problem. Would the noise be acceptable in the bedroom and as the bedroom air brick is at low level (600mm FFL) will this be suitable to save making a new hole.

My external wall is slightly thinner than the required 229mm, is there a way of installing the unit to overcome this?

We have an open plan living room/dining room with a stairwell going up to a landing and more rooms that is also open. If we were to put the fan in the kitchen wall, would it still work even though a lot of hot moist air would normally go straight up the stairwell? Would we be better off installing it up on the landing outside wall instead?

Hi, I have really annoying condensation both in my bedroom and (open plan) living room. Both rooms have two very large single sash windows. We get a fair bit of condensation always on the windows (walls are mostly fine, with no apparent mould). There is currently an air vent towards the ceiling in-between the two sash windows. I want to utilise that existing hole in the wall and place your unit inside it. I still need to do measurements, etc. but I had one question at this stage: The wall where I want to install the unit has an electric heater, so the unit would be above the electric heater, but at a significant height. Is that a problem? Would that hinder the unit in any way from performing its job? Thanks very much!

is there a product similar to this, which can be ceiling mounted and vent into the loft space?

I need some guidance on installing this Ventilator. Can you suggest any electrician/contractor local to Coventry ? I need some quotation for Unit+Installation charges. Do you have any approved installers for this Product ?

Can this unit be ducted as my cellar is 6 feet underground?

Hi - I'd like to install a heat exchange ventilator in the bathroom - but because of various obstructions on the walls, I'd need to put in some ducting before the outlet through the wall. - about 2.5 - 3 meters, and 2 bends, before it goes through the wall. Will that be ok, and do you sell the ducting, or can I use standard (and what size). Thanks. Jay

We have a sitting room with no outside walls. Can you recommend a ceiling fitted unit with ducting through the loft? I also want a unit for the bathroom, which does have an outside wall.

Hi I’m considering installation in the main bedroom to reduce a build up of VOCS. I have access to two outside walls. One wall is a standard two brick plus air gap, but is not the preferred location for the fan. To gain access to the second exterior wall I need to run the extract fan through plasterboard, where the ceiling has been lowered by 0.4m. The overall run would be 1.2m. Would the Extractor Fan and a single “Extension Kit”, allow for installation through plasterboard.

Does the Kair Heat Recovery Extractor Fan work as well when it is installed in a window rather than a wall? I am thinking that it would be easier to install in a window but if it does not work as well am I better to pay the extra to have the wall installation? I am having problems with condensation in the kitchen and living room of an apartment that I own and am hoping that this will solve the problem. Kind regards, Deborah Hill

I'm considering this unit to provide nighttime ventilation for a bed room without the need to open a window. We live within half a mile of a motorway, and the hope is that this unit would be less noisy than that, and also more usable in winter. (I assume there will be some noise transmission through the unit as well as the noise it makes!) The installation instructions suggest mounting the unit high to ease mains connection, but all our mains connection is low down, and aesthetically it would look better low down. I realise that low-down mounting is likely to have some impact on the air flow due to furniture etc in the room, but are there other reasons to avoid it? Condensation is not an issue (it's a new build house) so is there an option without all the humidity sensing?

Hi Ian, Thanks for your responses! _ The location at low level is more of an issue as the unit relies (in winter) on the fact _ that warm air rises and this provides the heat exchange for energy efficiency. When it comes to bedroom ventilation, carbon dioxide removal is also an important consideration, and of course carbon dioxide is heavier than air, so lower would be better. While I can imagine that the heat exchanger is transferring more energy when the temperature difference is greater, I'd also expect that the amount of heat lost outside is actually larger. It's a smaller percentage but of a larger amount. So in terms of keeping the room warm in winter, lower is better, unless there's some really weird thermodynamics going on. However I can see that higher would be better from the perspective of "stirring the pot" - a lower setting is more likely to cause a "puddle" of cooler air around the vents, while cool air coming in at a greater height will fall and hence is more likely to cause mixing. And if you're not mixing the air there's little point in having a fan! _ If the unit is required for a bedroom, is _ there a loft space above? Sadly no - it's a flat roof. Thanks for the information - it sounds like any location is going to be somewhat of a compromise given all the factors I have to work with.

Do I need one fitted in every room?

Is there a maximum room size where this fan should be fitted

Is there a requirement for an internal or external condensate drain. Does the unit as sold for £286 come complete with the transformer/humidistate or does this need to be purchased separately

Would your K-HRV150 unit be suitable for an 8ft by 11 ft garden room that has rather thin walls? The walls are breeze block with insulation and plasterboard on the inside and render on the outside, so the total wall thickness is just a bit over 15 cm.

Hi, I will shortly be installing a large dehumidifier for a pool room and this dehumidifier will do the required dehumidification. I'm thinking of getting this Kair heat recovery unit simply to provide ventilation, but keep the incoming air warm. The room is 9m x 7m x 2m. Will it be suitable for this purpose?

We are looking for individual heat recovery fans for a bathroom and a kitchen. The bathroom measures 2.2x1.6x2.5m. The kitchen measures 5.0x2.3x2.6m. What would be suitable for each room, especially the kitchen since according to your (very useful) air exchange guide,the kitchen would require a massive air exchange rate (299 l/sec !?). Also,can an ordinary electrician install individual heat recovery fans?

Can you tell me if I will hear noise from the outside. My outside wall backs onto the back of a shop who have a large and noisy air conditioning fan running 24x7. I have the windows closed to stop the noise, hence the condensation....would this unit transfer the noise into the bedroom ?

Hi. This item is out of stock wherever I look. Do you know when it is likely to come back into stock at i-sells.co.uk? Thanks

Hi, old mid terrace house, no cavity walls,small damp cellar under front room only from inadequate ventilation. do you think this fan would be able to ventilate the cellar sufficiently and dry it out ? the air would be expelled a little above floor/ pavement level- but from head height in cellar. i am thinking it would fit in air brick site under the floor.. would i have to block up any other air brick in cellar for best effect ? previous owner had blocked up air bricks [ idiot ] so i need to sort it quickly.i am guessing size wise the kit would fit the wall thickness. many thanks , rob

One of these units has been recommended for installation in a second floor bedroom to cure a condensation/mould problem. The unit looks suitable to cure the problem but I am balking at a quote of £700 to purchase and install one unit. Is this reasonable?

I would like to install a Single Room Mechanical Ventilation Heat Recovery System in my bathroom, but the only reasonable way of connecting to the outside air is through the roof. Is it possible to do this, rather than going through the wall? Can your heat recovery unit be used with a standard roof vent tile, or is there another way?

I have been waiting to purchase this item for several months but haven't because its not a stock item, I have noticed that it is due in stock on 6/12.21. If I place an order with you now will you debit my account with the full purchase price on the day of purchase or 2months from now when the item is dispatched?

unit not working at the moment are there any fuses that may have blown and can be replaced

Thanks for aswering my question ive opened it up and the fuses are missing can you tell me exactly what fuses they are please

Hi, this would be for a kitchen, so I dont really need SELV. Do you do such a version? Thanks, David

What is the noise/decibel level of the product when switched on at the different output levels?

We had one of these heat recovery extractor fans fitted in our conservatory a few weeks ago in order to cure the condensation problem that we were having . I must say that although the unit was on boost for a couple of weeks it has sorted out the problem. The only thing is even with the radiator on the unit seems to be blowing out cool air , I thought that it should circulate the warm air in the room. The unit is on the opposite wall to the radiator if this makes any difference. I look forward to your early reply.

Are the controls manual and is there an off switch? Thanks. Ruth

Hi there, is there an adaptor for using this in a single skin wall (approx 215mm + plaster)? I.e. something to secure the overlap of the 345mm shaft...

Hi, we have a small 2 bedroom terrace with upstairs bedroom. We currently experience high levels of moisture from the bathroom, adults and child sleeping upstairs and kitchen cooking and clothes drying downstairs. Is there a way I can understand the right number of units as really keen to purchase, but want to right-size the requirement. At the moment, I think I would like one unit in the kitchen downstairs, and one or possibly two upstairs. I'm uncertain about the upstairs as the house is small, hence the question. Once we've come up with the right number of units, it would also be great to see if you have any recommended suppliers in the East of England? Many thanks for any help

We had the fan fitted recently but the night sensor was not activated. Could we activate it ourselves or do we need to get an electrician to activate it? In either case, please tell us how to do it as I can't see anything about it in the instruction booklet. Thank you.

We need to improve ventilation and control humidity in the kitchen. The only feasible access is through the wall to the adjacent garage. An extension of about 1m would then allow access through the garage wall to the outside, but I understand it is not possible to duct the kair unit. What would you suggest

Hello, We suffer from lots of condensation and black mould spots in our bedroom each winter. These grow around the window frame most densely, as well as on curtains and blinds, the exterior bedroom walls (of which there are two) and also any furniture positioned in the coldest areas of the room. Previously I was advised to open a window to allow the damp air to escape, but this doesn't work and is also very cold in winter months. I have tried to remove with damp spray each week to try and limit the problem but this is just a quick fix. This year we have a new baby (currently 3 months old) so need a solution and am hoping the Kair Heat Recover Extractor Fan would work. I'm not sure if this is the right product as I can't see anything about mould in the questions above, just condensation. Many thanks in advance for your advice.

Does this unit have a continuously run function? What is the range of humidity sensor please? Would it suit 6m by 6m open plan kitchen/family room?