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Kair®
Positive Pressure Flat Input
Ventilator
Model: KFV100
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![[Product Image]](../images/products/kair/flatunit.jpg)
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Provides Continuous Background Ventilation To Combat
Condensation Dampness and Black Mould
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| Meets Building Regulations requirements Document
F1 (Alternative methods)
Easy to install (no external access required)
Whisper quiet
Continuous running trickle or boost ventilation
Humidity sensor (optional)
Low running costs
Positive input airflow
Security ventilation™ (no need to open windows)
Health benefit - produces dramatic improvements of indoor air
quality Heat
Energy dividend
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Kair™ Positive Pressure Flat Input Ventilators have been designed to create a
continuous positive air pressure (providing a capacity to move in excess
of 100m3 per hour). This will effectively combat condensation dampness
and mould growth and meets or contributes towards the F1 Building
Regulations requirements for ventilation.
Condensation occurs when the water content of air rises above a level
called the ‘dew point’. At such time, water droplets will form on the
coldest surfaces i.e. window, external walls etc. On average, a family of
four people will produce about two gallons of water vapour per day from
activities such as cooking, bathing, breathing and the washing and drying
of clothes.
It is also a fact that nowadays most properties are insulated to
prevent warm air from escaping. This reduction in ventilation allows the
air contained within the property to reach a higher relative humidity.
Kair™ Flat Input Ventilators will help provide protection for
hygroscopic material such as wallpaper, books, leather goods, wooden
furniture, clothing and other fabrics from mould.
Kair™ Positive Pressure Flat Input Ventilators utilise heat that exists at ceiling
height due to convection and recirculates it around the dwelling. The
continuous air movement throughout the property will create surface
evaporation of moisture contained in the building fabric. This will in
turn create a drying out process, which means that there will be less
hidden moisture to heat up (see leaflet ‘Cost of hidden moisture’).
As long ago as 1989, an article in the British Medical Journal referred
to the health hazards associated with condensation and mould growth in
dwellings. The Statutory Fitness Standard clearly states that dwellings
with inadequate ventilation, condensation and mould growth problems are
unfit for human habitation and Building Regulation Guidelines require a
supply of fresh air and the removal of pollutants.
Kair™ units, by reducing humidity to optimum
levels (Kair Health Line™), eradicate condensation, prohibit mould
growth and discourage the spread of bacteria, viruses and dust mite
activity. By expelling dust particles, gasses and other household
pollutants, the units create a dramatic improvement in the quality of the
indoor air supply.
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Kair™ Flat Input Ventilators draw in fresh air through an external
wall. The air is filtered and passed through ducting to discharge at
ceiling level at a central location of the flat (hallway where most doors
are situated). The fresh air mixes with the warm air rising above head
height and redistributes it throughout the entire flat.
Each room is slightly pressurised and the continual air movement
eliminates stagnant pockets of moisture-laden air, which are eventually
expelled through natural leakage points (window and door crevices, flues,
air grilles etc). In effect, reversing the tendency towards cold draughts
entering the flat.
An overall improvement in the internal atmosphere will be noticed
within a few days.
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To combat the variable factors related to humidity levels within
dwellings, the Kair Flat Input Ventilator has a specially designed speed
control which allow the user to adjust the airflow rate as and when it is
felt necessary or if preferred a humidistat control that adjusts the unit
speed from trickle to boost automatically.
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Kair™ Flat Input Ventilators are designed for wall or ceiling
installation in flats or similar dwellings with no roof void. The unit
should be sited as near as is practical to an outside wall air inlet
grille and minimum ducting runs are preferable to discourage the formation
of condensation on the ducting. If long runs of ducting are required it
may be prudent to incorporate boxing-in into the design.
Any competent D.I.Y. enthusiast or an electrician can simply install
the Kair Input Ventilator.
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Please see separate specification clause leaflet.
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Kair™ Flat Input Ventilators require only a minimal amount of
maintenance to ensure efficient running. The internal filter should be
cleaned or replaced approximately every 12 months subject to prevailing
conditions. The motor incorporates ‘sealed for life’ bearings and
requires no maintenance.
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Installation can be carried out by a suitably qualified craftsman and
connected to electrical supply by an electrician in accordance with IEE
Regulations.
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The unit meets Building Regulations.
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Note: For ease of installation, the input and supply rectangular
spigots and the internal motor, can be rotated by 90° to enable tight
fitting against ceiling or walls.
| Dimensions (mm) |
| a |
b |
c |
d |
e |
| 380 |
290 |
185 |
100 |
50 |
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Trickle |
Boost |
Daily |
| Airflow |
68m³/h |
102m³/h |
1113m³/24h |
| Watts |
14 |
42 |
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| dBA |
23 |
42 |
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Typical Performance figures |
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Ventilation is necessary to maintain a healthy and comfortable internal
environment and to rapidly remove pollutants such as moisture, volatile
organic compounds (VOC’s), allergens such as dust, oxides of nitrogen,
carbon monoxide, carbon dioxide, tobacco smoke and unpleasant odours.
Moisture is generally assumed to be the most significant of these
pollutants because of the high rates of generation from cooking, bathing,
washing, drying etc and the consequential condensation and mould growth
problems. It follows that if the ventilation strategy is based on
controlling this principle pollutant by heat recovery input / extract
ventilation then logically the other indoor pollutants will also be
adequately controlled.
Stale air, and air which is hot or humid, should be replaced at a
reasonable rate.
Good ventilation means providing a balance between energy efficient and
healthy indoor air best summed up by the catchphrase ‘build tight –
ventilate right’ . The fresh air supply rate should not normally fall
below 5 to 8 l/s per occupant. This is best achieved by creating
continuous air changes of 0.5 to 1.0 every hour, throughout the entire
dwelling as specified in D.E.T.R. Good Practice Note 268.
Although building regulations relate to new buildings, the guidance on
ventilation is applicable to existing dwellings and most important of all,
the regulations are concerned with minimising the risk to health from the
build up of pollutants. The KFV100 helps to satisfy all of these criteria.
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| ACCESSORIES |
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| Kair™ Flat Ducting Kit
Stock code: FLATKIT
Standard ducting parts sufficient for the average installation
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3 No. FLAT CHANNEL
2 No. 90° HORIZONTAL BEND
2 No. 90° VERTICAL BEND
2 No. LOUVRED GRILLE
2 No. WALL PLATE - WHITE
4 No. FLAT CHANNEL CLIP
2 No. CHANNEL CONNECTOR |
| Example ducting accessories
Stock Code: Various
Full ancillary list available on request |
 
 
 
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| Switch control
Stock Code: KSC2
Two speed switch control |
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| Humidity Control
Stock code: HUMIDISTAT Automatic humidistat to switch ventilation
modes |
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| Hour meter
Stock code: HOURMETER
To verify continuous use or record interruptions to electricity
supply |
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| Tamperproof bit
Stock code: TBIT
Security ventilation™ - to prevent interference by persons
other than authorised service personnel |
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| Tamperproof driver
Stock code: TDRIVER
Required to install unit
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| Pen size RH meter
Stock code: RHMTR
Measures the Relative Humidity and temperature levels |
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| REFERENCES |
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- i. Statutory Fitness Standards – Housing Act 1985
- ii. Department Of The Environment F1 Guidance – Means Of
Ventilation
- iii. Airborne Fungal Glossary – Basic Fact About Mould –TRD
- iv. Housing Act – (COSHH) Control Of Substances Hazardous To
Health Regulations – 1988
- v. Optimum Relative Humidity Guide KTIC
- vi. Building Research Establishment. Digest 297 ‘Surface
Condensation And Mould Growth In Dwellings’
- vii. NHS – A Health Strategy For London
- viii. DETR – Energy Efficient Ventilation In Housing – Good
Practice Guide 268 ix. Home Energy Conservation Act 1985 x. British
Standards Institution. Bs 5250. ‘Control Of Condensation In
Buildings’. BSI, London, 1989
- xi. Perera M D A E S And Parkins L M. ‘Build Tight – Ventilate
Right’. Building Services Journal, June 1992. – CIBSE, London,
1992 xii. Property Associated Technical Standards
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