Greenwood Airvac Services


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We've been working in ventilation for over 140 years so there isn't much we don't know about designing and applying it into new and existing homes...

With GIP Guaranteed Installed Performance at the core of our business, and our continued drive in product development, 'getting it right' is important to us.  With a growing Technical Service team, we offer a comprehensive service to all of our customers; from architects at design stage; consultants who are working with SAP calculations; to installers who are on site with products in hand and end users asking us about how our products are operating in their homes.

We offer expertise, advice and training and we stand by our GIP principles - we believe ventilation should be doing the job it's supposed to and we design and provide products that deliver it easily and simply.


We offer a full and extensive range of services:

  • Full CAD ventilation system design and quotation
  • Quick quote via standard layouts (based on number of bedrooms)
  • Technical support for installers - over the phone or on-site
  • Accredited installer training e.g. BPEC2U
  • Quotation service by house type
  • Expertise in Building Regulations and other regulatory documents
  • Relationship and supply management between housebuilders, consultants, contractors and distributors
  • Dwelling application, installation and end user requirements
  • Full range of innovative and aesthetically designed solutions, both mechanical and passive
  • Third party certified test information available on request
  • Fully guaranteed products
  • Bespoke customer literature e.g. tenant datasheets, maintenance guides

Explore our Services section for full details and information.

Zehnder Group