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Kair™ Whole House Input
Ventilator
Model: KWH150
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Provides Continuous Background Trickle Ventilation In
Houses And Bungalows
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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 (solar gain)
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Kair™ Whole House Input Ventilators (Loft units) have been designed
to create a continuous input of air (providing a capacity to move a
maximum of 375m 3 per hour). This will effectively combat condensation
dampness and mould growth and meets or contributes towards the F1 Building
Regulation requirements for ventilation. Kair™ Loft units create a
continuous drying out process in dwellings and will help provide
protection for hygroscopic material such as books, leather goods, wooden
furniture, clothing and other fabrics from mould.
Unlike conventional extractor fans, which suck out and waste
expensively produced heat, the Kair™ Loft Input Ventilator utilises heat
that exists in lofts through solar gain and simultaneously circulates
existing heated air that has raised to ceiling height, heat which also
helps increase temperature of the loft space air supply to the unit.
The continuous air movement throughout the property creates surface
evaporation of moisture contained in the building fabric. This in turn,
creates a drying out process, which means that there will be less hidden
moisture to heat up increasing efficiency savings.
Kair™ Loft Input Ventilators consume less than a 60 Watt light bulb
when in boost mode and less than a 40 Watt bulb when on background
trickle.
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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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 e.g. windows, 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™ Loft units sited in the roof void draw in fresh air from the
eaves. The air is warmed by Solar Gain in the loft space and is filtered
and passed through ducting to discharge at landing ceiling level. The
fresh air mixes with warm air rising up the stairwell and redistributes it
throughout the entire property.
Each room is slightly pressurised and the continual air movement
eliminates any stagnant pockets of moisture-laden air, which is eventually
expelled through natural leakage points (window and door crevices, flues,
air grilles etc.). In effect reversing the tendancy towards cold draughts
entering the property.
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, the Kair Loft unit
has a specially designed speed control, which allows the user to adjust
the airflow rate as and when it is felt necessary.
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Any competent D.I.Y. enthusiast or an electrician can simply install the
Kair Unit. Easy to install, out of site in the loft space, the unit has an
Input Diffuser, usually fitted over the stairwell, which creates a vortex
of warm air, which is then pushed around the dwelling by the input
ventilator. This recycled heat, which would normally disappear into the
loft, is used to temper the incoming fresh air.
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Please see separate specification clause leaflet.
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No maintenance is required, only a change or clean of air filters every
year or two dependant on prevailing conditions.
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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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| Dimensions (mm) |
| a |
b |
c |
dØ |
| 220 |
275 |
275 |
150 |
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Trickle |
Boost |
| Airflow |
150m³/h |
375m³/h |
| Watts |
30 |
55 |
| dBA |
21 |
45 |
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Voltage
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230V |
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Weight
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5Kg |
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Casing material
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Grade 1 fire retardant
white PVC |
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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 input 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 KWH150 satisfies all of these criteria.
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| ACCESSORIES |
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Stock code: K-WH150
Complete kit to install Kair Loft unit includes:
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1 No. Unit incl. Filter
1 No. 2 speed switch
1 No. White metal 150mm Diffuser
1 No. 150mm PVC Hose – 1mtr
4 No. Eyelets to hang unit |
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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In-Line Duct Heater
Stock Code:
DUCDH150-1.2
Duct heater with spigot connection for standard spiral ducts.
Manufactured from Aluzinc-coated sheet steel with a heating
element in stainless steel. The heater has integral overheating
protection with a manual reset function. Suitable for control by
room thermostat. The minimum air volume
required is 100m3/h.
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| Hour meter
Stock code: HOURMETER
To verify continuous use or record interruptions to electricity
supply |
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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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