Often copied - never bettered - look out for inferior copies... This unit eclipses the imitators.
Solving Mould, Damp and Condensation Problems
The Kair KHRV150/12RH Single Room Heat Recovery Ventilator is perfect for you if you are looking to solve a damp problem in one of your rooms. Such as your kitchen, bathroom, utility room, living room, lavatory, washroom, conservatories, office and bedroom.
Continuous ventilation in your home
This unit is perfectly suited to your needs as it automatically controls the humidity of your room for you, so you can relax knowing that it will take care of everything for you.
The unit also offers you continuous trickle ventilation, so it will constantly clean and purify the air you breathe. Continuous ventilation is the key in keeping your home mould free.
Free extra set of filters
Register your product within 14 days of purchase and you will receive an extra set of filters for FREE!
Reducing heating bills
The unit is highly energy efficient so it will help you save money on your heating bill. Up to 86% heat recovered from extracted air, means even in cold winter weather the incoming clean air will remain at almost the same room temperature.
Clean air for You and Your family
The unit is 100% completely safe for you to put in your bedroom or your child's bedroom since it has a very low voltage, keeping you and your family safe. By providing adequate ventilation the unit maintains the recommended humidity levels, preventing harmful bacteria being breathed in.
Installation of the K-HRV150 Unit
This unit can be installed using a 152mm core drill. Uses Phillips or Tamperproof Screws - Supplied in box with installation instructions. Required wall thicknesses is from 229mm (9inch) to 356mm (14inch); this is the standard for British homes. For full installation instructions and other important documentation, please have a look at the Related files section below.
Here are some more ways in which the unit can help you:
What other people who have Trusted the Kair KHRV150/12rh say about how it has Helped Improve Their Quality of Life:
"My wife's asthma has improved and I have been less prone to sneezing fits caused by dampness in the air. The flat has smelt fresher and less dank" Mr Wookey, London
"The best money I have ever spent" - Mr Brown, Bournemouth
Buy now to create your own success story!
|Heat Recovery Efficiency (Up to - %)||86|
|Product Category||Heat Recovery Unit|
|Round System (mm)||150|
|Product Type||Heat Recovery - Single Room|
|Product Group||Ventilation Fan|
|Power Min (Watts)||9|
|Power Max (Watts)||46|
|Decibel Rating (dB) - Low||21|
|Decibel Rating (dB) - Max||45|
|Colour - Internal||White|
|Colour - External||Terracotta|
|Packaged Weight (Kg)||4.7|
|Packaged Length (mm)||545|
|Packaged Width (mm)||345|
|Packaged Height (mm)||220|
|Airflow Performance (l/s) - Low||5.2|
|Airflow Performance (l/s) - High||10.5|
|Airflow Performance (m³/h) - Low||19|
|Airflow Performance (m³/h) - High||38|
Your question will be sent to a member of our team. We'll email you the answer and post it on this page. If your question is about an order you already placed, please use our Contact Form to reach the customer service team.
Can this unit be used to extract heat from one room to another.
The unit is designed to take stale, moisture laden air from inside the propertyand exhaust it to the outside of the property. A separate air channel is thenused to bring fresh air in to the property, using the residual heat from theextracted air to warm the incoming air by passing both airflows throughseparate paths of an aluminium heat exchanger.
While the unit could theoretically be installed through an internal wallto exchange air between the two rooms, the unit is not designed for thispurpose and depending on the thickness of the internal wall, the unit mayprotrude if the wall is thinner than the minimum length of the unit (229mm).
As the unit has a balanced airflow, it would be extracting and supplying air toboth rooms at an equal rate, so it is a continuous cycle of air movement, not aone-way transfer of heat from one room to another.
I hope this helps explain some of the limitation of the installation you aresuggesting. If you would like to discuss this further please do not hesitate togive us a call.
Whats the running cost daily
The running costs based on average UK electricity costs as of April 2015 and an estimate of usage (Explained in explicit detail below) totals at roughly £0.04/day or £1.35/month.
I will show you below exactly how I have calculated this.
The unit is a continuous running appliance, meaning it runs 24/7, 365 days a year. The unit operates on either a 9 watt 'Trickle' Speed or a 46 watt 'Boost' speed (Source: http://www.kair.co.uk/product/kair-heat-recovery-room-ventilator/) The below calculation is based on the unit running on Trickle for 80% of the time, and Boost for the remaining 20% of the time.
You can quickly calculate the running cost using these two figures, the amount of time the unit runs for, and the price you pay for your electricity - At the time of writing the UK average is ~10.252 pence per kw (Source: http://www.ukpower.co.uk/home_energy/tariffs-per-unit-kwh).
1 Month = 730.484 Hours (Source: https://www.google.co.uk/search?q=Hours+in+a+month)
80% Trickle = 584.387 Hours
20% Boost = 146.097 Hours
Using this calculator (http://www.ukpower.co.uk/tools/running_costs_electricity/) we can work out the following running cost:
1. Watts = 9 Watts - K-HRV150/12RH Trickle Speed
2. Watts/1000 = kilowatts or kW = 0.01 kW (The calculator rounds this up to 2 decimal places)
3. Hours used in month = 584.387 Hours
4. Kilowatts x Hours = Kilowatt Hours or kWh = 5.84 kWh
5. Electricity price (in pence per kWh ) = 10.252 pence (UK Average)
6. kWh x pence = Cost (in pence) to run the item for 1 month = 59.87pence
7. Divide by 100 to get to cost in £'s to run for 1 month = £0.60
8. Number of the same items in the house = 1 x KHRV150/12RH
Total Cost to run K-HRV150/12RH on trickle for 80% of time 1 month = £0.60
1. Watts = 46 Watts - K-HRV150/12RH Boost Speed
2. Watts/1000 = kilowatts or kW = 0.05 kW (The calculator rounds this up to 2 decimal places)
3. Hours used in month = 146.097 Hours
4. Kilowatts x Hours = Kilowatt Hours or kWh = 7.3 kWh
5. Electricity price (in pence per kWh ) = 10.252 pence (UK Average)
6. kWh x pence = Cost (in pence) to run the item for 1 month = 74.84 pence
7. Divide by 100 to get to cost in £'s to run for 1 month = £0.75
8. Number of the same items in the house = 1 x KHRV150/12RH
Total Cost to run K-HRV150/12RH on boost for 20% of time for 1 month £ 0.75
TOTAL COSTS COSTS:
TOTAL COST PER MONTH: £0.60 + £0.75 = £1.35 / month
TOTAL COST PER YEAR: £1.35 x 12 months = £16.20 / year
this product mentions filters where are the filters located how often are they changed
There are four filters in total - Two are mounted internally inside the unit and two are accessible from two side access panels on the front fascia of the unit.
The best way to illustrate this is using this image: http://www.i-sells.co.uk/images/5_large.jpg - The two yellow items are the large and small filter for the unit. The filters are then mirrored on the other side of the unit.
The external filters can be easily cleaned/changed by simply opening teh side access doors. The internal filters can be easily accessed by removing the unit from the wall. We recommend this is carried out every ~8-12 weeks depending on conditions within your property. Replacement filter packs can be purchased here, but one set of filters is available free of charge if you register the unit within 14 days of purchase.
Full maintenance instructions can be viewed here or by clicking the 'Product PDFs' button on the rigth hand side of the product listing.
Please let me know if you require any further information.
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?
Thank you for your question. The HRV150 unit is fitted though a external wall and can not be ducted. We do a window kit for this unit the quick search number for you to have a look at is QS2890. If you require any further assistance please do not hesitate to contact me on 0208 463 9683.
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
Thank you for your questions. We recommend that the unit is install by a qualified electrician. The filters can be washed in warm soapy water and replaced when dry. The unit is continuous running the pull cord provides a manual override to facilitate additional 'boost' supplies of fresh filtered air.
Can this unit be ceiling mounted and used with aluminium flexi duct as I have no outside wall to drill thro. Thanks
This unit is not designed to be ceiling mounted as part of a standard installation and you cannot use aluminium flexible duct as the unit is both supplying and extracting air and using standard ducting would lead to cross-contamination.
We do offer a 90 degree bend kit which might potentially be possible depending on the length of the duct run. However, this will affect the extract and input air rates so the unit will be less effective. You may also have a problem with condensation dripping back down into the property. We would not generally advise this and we offer a variety of other systems which are more suitable for your application.
If you can email me some further details about your plans and your requirements I would be more than happy to try and find the perfect solution for your situation.
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.
Thank you for your question. The HRV150 Unit will not do your application. If you could give me a call on 0208 463 9683 and I will be able to help you further with your application.
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.
Thank you for your question. Depending what size the conservatory is as this unit can do up to approx 20feet. If you need any further assistance please give me a call on 0208 463 9683
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?
Thank you for your question. The HRV150 can be ducted to a maximum of 1 m using the extension kit. Unfortunately there is no though the wall heat recovery unit on the market which can ducted. However you may want to look at ceiling or loft mounted system.
You may wish to consider the Vent Axia HR100R or HR100RS ducted single room heat recovery unit but you would need to show the specification of the unit to your building control officer or other suitably qualified person to advise on suitability.
Anita & Michael
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.
Thank you for your question. The HRV150 is a heat recovery unit and will not do your application. The item you require is a black hole ventilator depending on what free air you require there is a list of 3 below.
QS2851 30cm free air
QS2849 70cm free air
QS2847 100cm free air.
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
Thank you for your question. For me to help you further would you be able to advise what size the room is and also is there an external wall in the room. My contact number is 0208 463 9683
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?
Hi Steven, It would be very helpful if you let us to know the thickness of the wall/structure that the fan is being installed.
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 Colette, I have answered this on the original format
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
Good morning Robert and thank you for your question.
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?
Good morning Ted, and thanks for you're enquiry.
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?
Good afternoon Ben, and thanks for your question. This unit is only deigned to go directly through the WALL. The only units that can be ducted to tile vents are the Blauberg Komfort D105-A and the Vent Axia HR100R / HR100RS. The tile vents will need to be at least 300mm apart, preferably 500mm to prevent the duct runs from contaminating each other.
Filters suitable for this unit
Replacement parts and spares
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