Greenwood airvac history

The Greenwood story since 1879

1879 was a great year...

As well as the birth of the Greenwood company,brand and product range, 1879 saw the introduction of a number of other classics including the electric lightbulb, the first cash register and even the first electric train.

A great year all round really!

A quick look... but scroll down for more details about our history

Nearing the end of 2013 and thinking about next year...

2013 has been a year of cementing our focus on delivering Guranteed Installed Performance in line with Building Regulation requirements.  Performance and GIP is at the core of everything we do from product development and system design and this has been underpinned by the launches of Vireo and Samika.

We have also introduced a brand new and innovative type of ducting - ComfoTube - which is re-writing the ventilation rule book. With sooooooo many benefits to the installer, the specifier and the homeowner, it's no wonder it won its first award at the Housebuilder Product Awards for Best New Product of the Year!

Watch this space... it's all about Bend it, Shape it, Any Way you want it!

2013 - Meet the new members of the family

This year we saw our family expand with the introduction of Vireo and Samika, two brand new Greenwood GIP Products!

Vireo is the next generation in Heat Recovery Ventilation and the best performing compact range in the UK.  Loaded with SMART Technology which reduces hassle during set up and overall installtion time, it also comes with 365 days of filtered air (unlike many others).

Samika is the fan you didnt know you needed - becasue it is an intermittent fan that is aleady set up to do what it needs to - basically wherever you install a fan, be it in a wall, window or ceiling, performance will be affected.  With Samika you can be sure that it will always deliver Guaranteed Installed Performance.  Afterall what's the point if it isn't doing its job??

2010-2011 - GIP GIP GIP

In 2010, Building Regulation revisions turned a corner and, for the first time, included on-site practise within the compliance requirements. Guaranteed Installed Performance targets installers for the first time and is in place to ensure that what is designed is what is installed in a property for the health of occupants and long term protection of the building.

To this end, Greenwood GIP Products were born - solutions that enable easy installation and set up and have airflow adjustability once on site in order that the correct GIP performances can be achieved. The first Greenwood GIP product launched was Unity CV2GIP dMEV, the first circular fan of its kind, also including Greenwood SMART Technology.

2008 - The Zehnder Group


In 2008, the business was acquired by The Zehnder Group.

With a story that started in Switzerland back in 1895 with the manufacturing of motorcycles, today, the Zehnder Group is a specialist in heating, cooling, fresh air and clean air. In addition to radiators for both the commercial and residential markets, the product portfolio also includes heating and cooling radiant panels, climate control systems and air filtration units.

Today the Zehnder Group are committed to creating energy-efficient solutions for a healthy and comfortable indoor climate.

In the UK, Greenwood is one of 3 business segment brands which cover residential, commerical and industrial markets, offering heating, cooling, fresh air and clean air solutions.


Carbon Neutral status was achieved for Head Office operations and 2 flagship products within the new range of whole house ventilation products.

Greenwood's Green Goddess made sure that everyone understood  the part they had to play in ensuring that simple actions like turning lights off and recyling paper could contribute to reducing the overall footprint.  Everyone showed their committment by helping complete our 'fingerprint tree' which is proudly hung in our reception area!

2005-2006 The first dMEV

Following the revision of the Building Regulations and the introduction of performance based, whole house ventilation, Greenwood launched the first ever dMEV solution to the new build market - a brand new continuously running, low energy , constant volume fan which revolved around one concept - a single solution for the bathroom and kitchen.

Unity CV100 was also the very first fan to challenge the existing design of extractor fans, introducing a discreet fascia plate, rather than an open louvered grille.

2000-2002 - We enter a new era

In 2001 Greenwood took a very bold step with their product portfolio and launched the 'Environmental Range' - a collection of whole house ventilation systems including central extract and heat recovery - one of the very first manufacturers in the UK to do so.  This brand new range came with the strap line 'improve the living environment' and transformed the brand, message and direction of the company, focusing much more on people and lifestyle and on applying ventilation metholdogy to achieve whole house ventilation rates, rather than prescriptive room based extract fan applications.

As a core part of this environmental launch and transformation, Greenwood developed deeper relationships with clients and specifiers by extending their services to include design and consultation.  This saw the launch of the AutoCAD Design Service allowing customers to send in plans and drawings and ventilation designs to be created including where to fix the unit and where to run ducting.


This design service is still very much a fundamental part of our service to customers today and, with Guaranteed Installed Performance (GIP) at the forefront of people's mind, continues to add value to clients, specifiers and installers alike.


1992 was a game changing year for Greenwood's business as Building Regulations were introduced for ventilation.  Approved Document F: Means of Ventilation gave specific performances for rooms which had to be achieved in new buildings and which was to be used as Best Practise for existing dwellings.

In 1996 after more successful years of trading, the Hunter Group and subsequently Greenwood Airvac were acquired by the Marley Group. Shortly after, in 1997, the Marley Group was acquired by the Aliaxis Group.

The Aliaxis Group is an international group of businesses dedicated to the manufacture and sale of PVC pipe systems and related building and sanitary products for residential and commercial construction, industrial and public utility applications. 


After successful growth and excellent sales, Greenwood's Head Office was relocated to the south coast at premises in Rustington, West Sussex.  The site was used for all operations, including manufacturing, which saw significant investment in the local area by providing a good number of jobs.

In 1982, after many years of successful trading, Greenwood was accquired by the Hunter Group who were a market leader in plastic products and who saw the acquisition as a key move to widen their PVC product mix.

Under Hunter's ownership, the development of the PVC product range was rapid and the iconic Select and P Fan ranges were introduced - both of which are still available today - the Select range having seen a few face lifts, but the P Fan still in all its orginal design glory!!!!


Mr Thomas Wooton Greenwood starts the company in Manchester and the first ventilator is manufactured under the Greenwood brand.

In 1938, Greenwood acquired new company premises in Wembley and continued to trade successfully developing new ventilation products for different applications, focusing specifically on passive and smoke ventilation products.





We still have in our posession some of first pieces of marketing literature designed!

Zehnder Group