Janet’s Corner Passivhaus project, Isle of Man Green Building Store

Janet’s Corner, Isle of Man

Janet's Corner Isle of Man Passivhaus
As a result of our initial confidence and the pioneering work that the larger group of Passivhaus “converts”, which Green Building Store regularly worked with, we felt assured in appointing Green Building Store as Housing Division’s Passivhaus Consultant for the Passivhaus Pilot Project at Janet’s Corner. We would be happy to use Green Building Store on other similar Passivhaus projects.

John Payne

Senior Architect at the IoM Government – Department of Infrastructure’s Housing Division

We were impressed with Green Building Store’s understanding of ventilation design and the practical application in housing. The system designed was integrated into the architectural drawings being produced by Housing Division’s in-house Architects and installation overseen on site. The installed system was commissioned by Green Building Store’s mechanical engineers and has operated quietly and efficiently since installation.

John Payne

Senior Architect at the IoM Government – Department of Infrastructure’s Housing Division

We would be happy to use Green Building Store to design similar ventilation on other similar Passivhaus projects.

John Payne

Senior Architect at the IoM Government – Department of Infrastructure’s Housing Division

Green Building Store’s training was practical and clearly delivered for Government Officers initially and to trade operatives through a series of “toolbox” talks on site.

John Payne

Senior Architect at the IoM Government – Department of Infrastructure’s Housing Division

Two three-bedroom Passivhaus certified homes have been built at Janet’s Corner in Castletown on the Isle of Man (IoM) and have now been occupied by public sector tenants for over a year. The project is part of wider efforts by the IoM Government – Department of Infrastructure’s Housing Division to encourage more sustainable construction methods in the Island and evaluate practical solutions to improve energy efficiency. The houses have also provided an opportunity for construction students at the Isle of Man College, and others within the industry, to enhance their knowledge of the Passivhaus building method and to encourage the wider development of low-energy housing.

Green Building Store was engaged as the Passivhaus Consultant to work with the IoM Government’s own Housing Division and Green Building Store’s consultancy service supported the project with a wide range of services. Green Building Store also designed, supplied and commissioned the MVHR systems on the project.

Post-occupancy monitoring

An interim study monitoring the first year of occupancy has shown significantly lower levels of electricity and gas consumption in the two eco houses,  with the homes using up to 58% less energy than the average UK household.

Results for the three-bedroom homes revealed total annual energy consumption of 9,070 kilowatt hours (property 1) and 7,589 kilowatt hours (property 2). Average annual energy consumption in the UK is 18,378kWh, according to data published by the UK Government’s Department of Energy and Climate Change.

The figures for the properties were also well inside the target (10,329kWh) required to meet the certified Passivhaus standard.

Cavity wall construction

The homes were built using cavity wall construction, the predominant building methodology on the Isle of Man.

John Payne Senior Architect at the IoM Government – Department of Infrastructure’s Housing Division commented:

“Housing Division first heard about Green Building Store’s exciting Denby Dale Passivhaus project through the Architectural and construction press and followed its progress through Bill Butcher’s blogs and communications.

We were very interested because as an island community the majority of new homes are traditionally constructed and we saw the potential to adopt similar methods of construction for the development of Affordable Homes for the Island (Public Sector for Rent). As a result a Passivhaus Pilot project was established under a special “Energy Initiatives Fund”. Officers attended seminars at Green Building Store’s base and visited Denby Dale to see and hear about the owners’ experience first- hand. We were impressed with the openness of the company and willingness to share what might be considered to be “intellectual property” with as many interested parties as possible. Bill Butcher’s practical experience and ability to undertake practical cost/benefit analyses of different details and specifications was very helpful to us and his practical presentation of construction methodologies was very helpful.”

Consultancy service

Green Building Store’s consultancy service provided the following services for the project:

  • PHPP Modelling
  • Thermal Bridge modelling
  • Construction detailing
  • Supporting delivery of project while on site
  • Help with preparation of documentation on certification
  • Training of IoM officials and building contractors

John Payne added:

“As a result of our initial confidence and the pioneering work that the larger group of Passivhaus “converts”, which Green Building Store regularly worked with, we felt assured in appointing Green Building Store as Housing Division’s Passivhaus Consultant for the Passivhaus Pilot Project at Janet’s Corner. We would be happy to use Green Building Store on other similar Passivhaus projects.

Green Building Store’s training was practical and clearly delivered for Government Officers initially and to trade operatives through a series of “toolbox” talks on site. Housing Division also hosted free training delivered by Green Building Store for other consultants on the Island to familiarise them with the Passivhaus concept. We would be happy to utilise GBS’s training for Government employees involved in other similar projects.”

 

MVHR heat recovery ventilation

Green Building Store designed supplied and commissioned the Paul Focus 200 MVHR systems at the project.

John Payne added:

“We were also impressed with Green Building Store’s understanding of ventilation design and the practical application in housing.

Housing Division appointed Green Building Store under a separate consultancy appointment to design the ventilation for the pair of Affordable Homes constructed under the Passivhaus Pilot Project. The system designed was integrated into the architectural drawings being produced by Housing Division’s in-house Architects and installation overseen on site. The installed system was commissioned by Green Building Store’s mechanical engineers and has operated quietly and efficiently since installation. We would be happy to use Green Building Store to design similar ventilation on other similar Passivhaus projects.”

Completed: 2015

Case study: 2017

 

More information

Report on 1st year monitoring: https://www.gov.im/news/2016/aug/04/study-shows-significantly-lower-energy-consumption-in-passivhaus-properties/

23rd January 2017

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