Video | Agriculture | Confidence | Economy | Energy | Employment | Finance | Media | Property | RBNZ | Science | SOEs | Tax | Technology | Telecoms | Tourism | Transport | Search

 


Home Ventilation Competition Hots Up

Home Ventilation Competition Hots Up

A unique ventilation system, now produced commercially, reduces unwelcome condensation and keeps homes drier and healthier at a quarter of the cost of competitors.

Auckland electrical engineer John Wadsworth designed and built the ductless unovent home ventilation system for moisture reduction, and has patented it in New Zealand and overseas.

“This is a game changer,” says Mr Wadsworth, who established Unovent Limited in April this year. “Modern home ventilation systems have been around in New Zealand for 18 years and they have always been done with a ducted system.

“Mine doesn't need ducting or a large fan in the cavity of the roof, and it's simple to install and maintain. Importantly, it's just as effective in reducing moisture in the living areas and condensation on the windows,” he says.

Mr Wadsworth, formerly managing director of Honeywell New Zealand, developed a small, all-in-one vent and fan which is operated by a 12 volt lightweight power cable. The unovent unit includes a filter which can easily be removed from inside the room, washed and put back in place.

A standard three-bedroom house would have four units installed in the ceiling of each living area and are connected by the cables running to power supply plugged into a 240 volt switched socket located in the roof cavity or in a cupboard.

The traditional home ventilation systems comprise a large central fan and filter cartridge installed in the roof cavity and connected to a network of aluminium foil ducting which fit into ceiling-mounted room vents. The fan, usually between 80 and 200 watts, has to be big enough to overcome the resistance of the ducting and uses more power. The filter cartridges have to be replaced every two years at extra cost.

The unovent kitset for a three-bedroom house (four vents and integrated fans and filters, power cabling and plug connectors) costs $950 including installation and a comparable product is up to $4000, with installation taking one to two days.

Mr Wadsworth's invention uses less than $1 worth of power a month; whereas a 200 watt fan will soak up that amount in a day, creating a power bill of about $30 a month.

His system pulls dry air from the roof cavity and is mixed with the wetter air in the bedrooms, lounge and dining room, thus reducing the moisture content in the living areas. This also reduces condensation on the windows and moisture being absorbed into wall coverings, drapes and carpets which can lead to mould and mildew - key triggers for asthma and allergies.

“As well as having a healthy home with fresh, filtered air, you save on maintenance since the water doesn't run down the windows and rot the wooden surrounds, and the drapes or walls don't go mouldy and need to be replaced or repainted,” says Mr Wadsworth.

The unovent system can be kept running all the time during the cooler autumn, winter and spring months and shouldn't need to be used during the summer when condensation isn't an issue. The system has an optional thermostat which switches the system off when the roof cavity air temperature reaches, say, 28 degrees Celsius.

Mr Wadsworth sees big opportunities for his home ventilation system. “Over the past 18 years about 250,000 systems have been installed in homes in New Zealand. There are 1.4 million houses in the country capable of taking a ventilation system and we've got 1.15 million to go,” he says. “The modern double glazed, airtight home needs the system even more.”

Sitting in his new home in Pakuranga, Mr Wadsworth decided there must be a cheaper and simpler way of getting rid of all the moisture on his lounge and bedroom windows. He spent a year experimenting with three different ventilation mounting systems before deciding on the all-in-one vent and fan unit, which his company produces.

Following further research and testing, Unovent now offers a SourceControl humidity controller which is set and installed in the roof cavity to switch off the ventilation system during times of high humidity.

“The excess humidity of the roof cavity needs to be dealt with to avoid bringing the less helpful air down into the living area,” says Mr Wadsworth. “This happens when we get many days, one after another, of rainy or drizzly weather - even when the temperature outside and in the roof cavity is as low as 11 or 12 degrees Celsius.

“Most suppliers of home ventilation systems for moisture reduction never talk about this effect and what to do about it,” he says.

Mr Wadsworth began producing his kitset home ventilation system in April this year and it has already gone into more than 50 homes around the country.

Mr Wadsworth graduated from Canterbury University with a Bachelor of Engineering Honours degree, majoring in electrical engineering. He was the branch manager for Hewlett-Packard in Auckland, group engineering manager for Holyoake Industries (Australasia's biggest manufacturer of air management systems), and worked for Honeywell NZ for 16 years, being managing director for most of the 1990s.

He was also director of Honeywell Pacific's sensing and control group, a fellow of the New Zealand Institute of Directors, and was awarded the Paul Harris Fellow for leadership while a member of the Ellerslie Sunrise Rotary Club.

For more information visit www.unovent.com

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

BusinessDesk: APN's NZME Sees Future In Paywalls, Growth In Digital Sales

APN News & Media has touted a single newsroom concept for its NZME unit in New Zealand, similar to what Germany's Die Welt uses, saying an 'integrated sales proposition' is helping it win market share, including ... More>>

Labour Party: Global Milk Prices Now Lowest In 6 Years

The latest fall in the global dairy price has brought it to the lowest level in six years and shows there must be meaningful action in tomorrow’s Budget to diversify the economy, says Labour’s Finance spokesperson Grant Robertson. “Dairy prices ... More>>

BusinessDesk: NZ Inflation Expectations Creep Higher In June Survey

May 19 (BusinessDesk) - New Zealand businesses lifted their expectations for inflation over the next two years, sapping any immediate pressure on the Reserve Bank to cut interest rates, and prompting the kiwi dollar to jump higher. More>>

BusinessDesk: Lower Fuel Costs Drive Down NZ Producer Input, Output Prices

May 19 - Producer input and output prices fell in the first quarter, mainly reflecting lower fuel costs and weakness in prices of meat and dairy products. More>>

Media: Fairfax Media NZ Announces Senior Editorial Team

Fairfax Media New Zealand has today confirmed its new editorial leadership team, as part of a transformation of its newsrooms aimed at enhancing local and national journalism across digital and print. More>>

Science: Flavonoids Reduce Cold And Cough Risk

Flavonoids reduce cold and cough risk Research from the University of Auckland shows eating flavonoids – found in green tea, apples, blueberries, cocoa, red wine and onions – can significantly reduce the risk of catching colds and coughs. The research, ... More>>


BusinessDesk: RBNZ House Alert Speech The Catalyst For Government Action

Prime Minister John Key all but conceded that pressure from the Reserve Bank of New Zealand for concerted action on rampant Auckland house prices was one of the main catalysts for the government's weekend announcements about tightly ... More>>

BusinessDesk: How To Fall Foul Of The New Housing Tax Rules: Tips From IRD

Just because you rented out your investment property doesn't absolve you from paying tax, says the Inland Revenue Department in a summary of commonly made mistakes by non-professional property investors when it comes to their tax liability.More>>

Legal: Superdiversity Law, Policy And Business Stocktake Announced

Mai Chen, Managing Partner at Chen Palmer New Zealand Public and Employment Law Specialists and Adjunct Professor of Law at the University of Auckland, today announced the establishment ... More>>

Housing: More House Price Gains Expected

House price expectations remain high, with a net 56% of respondents expecting house prices will increase. Fears of higher interest rates are fading, consistent with the RBNZ’s signals this year. Affordability and a lack of houses for ... More>>

TDDA: State-Of-The-Art Drug Testing Laboratory To Open In Auckland

World leading drug testing agencies, The Drug Detection Agency (TDDA) and Omega Laboratories, open New Zealand laboratory More>>

Network: Bigpipe Launches Ultra-Fast Broadband Into Wellington

Bigpipe Launches Ultra-Fast Broadband into Wellington Naked broadband provider Bigpipe has extended its national reach, announcing today, the launch of its unlimited UFB offering into Wellington. The Spark Venture business is giving Wellingtonians the ... More>>

Get More From Scoop

 
 
 
 
 
 
 
 
 
Business
Search Scoop  
 
 
Powered by Vodafone
NZ independent news