1. Nuaire Positive Input Ventilation
April 2015
Daniel Evans

2. Why Do We Ventilate?
Ventilation helps to promote a healthy, clean environment
Designed to remove stale odours & replace with fresh air
Prevent build up of excessive moisture & humidity
Removes excessive C0₂ generated by humans & pets
Therefore, when you are building your property, you must choose from one of the available options and make a selection that suits your build because of course, each house is unique.
This is what is trying to be achieved by ventilating your property. The definition of ventilation is to replace stale air with fresh air and by doing so, creating a healthy, clean environment.
This is the main reason for ventilation. To get rid of the stale air, odours and smells, from the kitchen and bathrooms, and bring in fresh air into the build.
This is the secondary purpose of ventilation. Again, by extracting the moist, humid air from the kitchen and bathrooms this aids the prevention of condensation forming and mould growth occurring.

3. Lack of Ventilation - Effects
Condensation
Mould Growth
Smells & Odours
Dust Mites / Allergies
Radon Rn
(222)
Radioactive, Colourless, Odourless gas.
Rises from the ground Estimated 100,000 homes have a concentration above safe level 200Becquerel per m2.
THESE ARE THE 4 MAIN PROBLEMS THAT CAN OCCUR IF A PROPERTY IS NOT ADEQUATELY VENTILATED.
We’ve all seen this at some point, condensation forming on windows. The reason this happens is that condensation is produced. This happens in our daily routine, through cooking, cleaning, bathing, even breathing, all of these activities produces moisture. Now, during the day, when you’re home is warm the moisture is held within the air, but at night when it cools and you’re heating automatically goes off via the timer, the air starts to cool and the moisture will then be attracted to the coolest point of your home, which is normally the windows, but can be the gable end wall or your external doors for example. To put this into context for you, when you grab a cold can of coke from the fridge, it is dry, but if you leave it on a table for a couple of minutes, water droplets will naturally form on it. This is exactly the same scenario as the moisture we produce o a daily basis. This can become a real problem, as the moisture can seep into the window frames, the window sills and the surrounding walls and wall paper.
Mould growth is another problem that can occur. When moisture settles on a surface, over time it can develop into mould which will look like black spots on the wall. Proper ventilation will prevent this. The worst case scenario would be when the mould growth actually penetrates the fabric of the build. This needs to be avoided as it could lead to costly repair work, again highlighting the importance of proper ventilation. We have all seen examples of this, mould growing in the corners of rooms, most people wipe it away and think the problem is solved, but its not, what you don’t see is what’s underneath this. The mould spores can and will penetrate the fabric of the build and can damage the paintwork and plastering, which is not desirable.
This is a dust mite. With proper ventilation, as I’ve said, the air within the dwelling is cleaner. Because the air is clean, this reduces that number of dust mites as they cannot breed in that environment, but a lack of ventilation and their population will grow. There have been tests which show that the reduction of dust mites will help occupants who suffer from asthma and other respiratory problems. Adequate ventilation will also reduce the number of pollen particles in the air, which assists hay fever sufferers, and the level of pollutants in the atmosphere, again making it a cleaner, healthier place to live.
This is an obvious one! If the ventilation does not work, then the smells and odours produced cannot escape, especially in today’s standard new build as they are being built to be very air tight and energy efficient. In old buildings they can escape through natural leakage points within the build like around the window and door frame, corners of walls, cracks in the ceiling etc. But with homes these days being built as air tight as possible, correct ventilation is essential to get rid of the odours and smells.

4. How We Generate Moisture (BBCC)
Bathing
Breathing
Cooking
Cleaning
Average person generates 4 pints of moisture per day

5. How Do We Explain Moisture In The Home?
YOUR PROPERTIES AIR IS LIKE A SPONGE
Bathing, Breathing , Cooking & Cleaning generates moisture which is absorbed into the air (Like the tap running into the sponge)
Your Properties air will accept a certain amount of moisture and hold onto it without dripping
Once full the sponge leaks as it cannot hold anymore moisture (like in the air in your house)
Once the sponge is leaking moisture forms on your windows and walls as the air is now full and cannot accept any more

6. What Is Condensation: How Do We Explain Condensation In The Home?
Always Coca Cola!!!
Condensation is caused when moisture held in the air meets a cold surface like a window or wall and condenses into water droplets.
When we Bathe, Breathe Cook & Clean we create moisture which results in condensation
It often results in black mould growth on walls and other surfaces or you can see actual water droplets. It is usually worse in corners, on or near windows, in or behind wardrobes and cupboards.
CONDENSATION - THE MAIN CAUSE OF MOULD GROWTH

7. Moisture & Condensation:
Moisture created in the bathroom from showering
Once you open the door the moisture looks to escape to the coldest part of the house
Below shows the result of poor ventilation within your home

8. Further Issues: Condensation
Current Regulations & Standards drive buildings to save energy and reduce gaps in properties – lower fuel bills & save money
Loft Insulation
Double Glazing
Cavity Wall Insulation
Condensation
All of the above measures reduce air leakage

9. Positive Input Ventilation (PIV)
The Solution
Positive Input Ventilation (PIV)

10. PIV - The History
Nuaire are the originators of PIV Systems developed with North Eastern Gas Board
Over ½ Million Nuaire PIV Systems installed in the UK
Used by Local Authorities & Housing Associations all over the UK
Independently Tested by independent bodies such as Napier University Report & Document IP/1200 by BRE

11. HHSRS - Category 1 Health Hazard!
MOULD GROWTH IS CATEGORY 1! (SERIOUS RISK)
Local authorities are under a duty to take action against category 1 hazards which include Damp and Mould Growth.
As Landlords you have a responsibility under the Housing Health and Safety Rating System (HHSRS) to assess hazards and risks within your rental properties.
Leaving mould present in property causes serious health issues, causing some tenants to successfully claim compensation from Landlords.

12. Dilute – Displace – Replace
PIV - How It Works
2) The warm air then rises to the highest point, gaining heat energy giving you the benefit of some heat recovery
3) The air is then passed through the filters, and is gently fed into the dwelling via a central hallway diffuser
1) Clean, fresh air is continuously drawn in to the loft space through the loft’s natural leakage points
5) This process creates a clean, healthy environment to live in as fresh air replaces the stale air
4) The air then gently pressurises the house from inside out, driving out the moisture and condensation
Dilute – Displace – Replace

13. Moisture & Condensation With PIV:
Moisture created in the bathroom from showering
Dirty moisture laden air is diluted by the clean fresh filtered air from the Drimaster
Once you open the door the moisture looks to escape to the coldest part of the house
Drimaster Diffuser is positioned in the hallway purposely to mix with the stale air
Air escapes through the natural gaps in the property

14. When Are Additional Extract Fans/measures are Needed?
When there is an internal wet area WITHOUT an openable window.
When the air flow from the diffuser has to pass through two doors to reach a wet area.

15. When PIV is suitable on its own:
Wet rooms directly off the hall (all with openable windows)

16. When is PIV not suitable on its own:

17. Continued…

18. Flatmaster: Typical Properties
Why is the FLATMASTER manufactured to the size it is?
To fit above Kitchen cupboard space Normally around mm space above cupboard
(FLATMASTER Height 320mm)

19. Nuaire’s PIV Range Of Products:

20. DRIMASTER Unit capable of 60 l/s on normal operation
Boosts to 70 l/s in Heat Recovery Mode
6 speed settings l/s in steps of 10 l/s (may vary on different setting)
5 in built control strategies that adjust the operating temperatures
Built in hour run monitor as standard flashes in hours/ days/months to tell total run time
1 amp fuse supplied with the unit
Running cost 1p per day
5 year filter supplied as standard
Everything supplied to fit the unit

21. DRIMASTER 2000 Unit capable of 60 l/s on normal operation
Boosts to 70 l/s in Heat Recovery Mode
6 speed settings l/s in steps of 10 l/s (may vary on different setting)
5 in built control strategies that adjust the operating temperatures
Built in hour run monitor as standard flashes in hours/ days/months to tell total run time
1 amp fuse supplied with the unit
T2 Sensor for additional heat recovery
Running cost 1p per day
G4 5 year filter supplied as standard
G4 Filter – 5 Microns
Everything supplied to fit the unit

22. DRIMASTER-HEAT Supplied with 500W Heater Thermostat Heater control
Unit capable of 60 l/s on normal operation
Boosts to 70 l/s in Heat Recovery Mode
6 speed settings l/s
5 in built control strategies that adjust the operating temperatures
Built in hour run monitor as standard flashes in hours/ days/months to tell total run time
1 amp fuse supplied with the unit
Running cost 0.10p per day
G4 5 year filter supplied as standard
Everything supplied to fit the unit

23. DRIMASTER-3S
All features as per the DRIMASTER units however supplied with an aluminium diffuser as per below
For use in 3 storey properties
Unit must be linked to smoke alarm
Aluminium Diffuser with fire block for Protected Stairwell
Running cost 1p per day
G4 5 year filter supplied as standard
Everything supplied to fit the unit

24. FLATMASTER Units can be ducted from side or the back of the unit
Unit capable of 45 l/s on normal operation
3 speed settings l/s
3 amp fuse supplied with the unit
Unit capable of taking 100mm diameter or 121x60mm flat duct with both sets of spigots supplied as standard
Running cost 1 to 1.5p per day
G3 2 year filter supplied as standard

25. FLATMASTER 2000
Heater can be handed left or right
Units can be ducted from side or the back of the unit
Supplied with an in built 300W Heater
Thermostat Heater control built in
Unit capable of 45 l/s on normal operation
3 speed settings l/s
In built manual boost switch on the unit for heater
3 amp fuse supplied with the unit
Unit capable of taking 100mm diameter or 121x60mm flat duct with both sets of spigots supplied as standard
Running cost per day 15p based on unit at 30 l/s, last 12 months average temperatures & target temp of 8 degrees c (13p electric cost per KW Hour)
G3 2 year filter supplied as standard

26. Thank you for listening
Any Questions ?