Passivhaus Consultant and Designer.  Very Low Energy Buildings.  Domestic and non-domestic.  New build and refurbishment. 

07502 425158

Bristol, UK



Fungi Fruits

We are advising Fungi Fruits on simple, energy efficient ventilation approaches to manage temperature, CO2 and air quality in their mushroom growing vaults below the former Green Park Station in Bath.  We have been working with Philip Haile of Transition Bath who has undertaken a thermal imaging survey and is helping with the designs.

The vaults require warm dark conditions for incubation and cool light conditions for fruiting.  The challenge is to reject heat and provide cooling in summer whilst retaining heat and adequate ventilation in winter.  Hygiene is also critical.

The available funds are limited, so simple low cost solutions are necessary.  

The proposed solution is to separate the vaults into a number of different areas and use a combination of night cooling and evaporation to achieve suitable humidity, CO2 concentration and temperature in the fruiting vaults and to vary packing density of the heat producing incubating bags and ventilation rate to manage temperature in the incubating vaults.

This is a fascinating project and we really hope that we can help Fungi Fruits become a thriving busines in Bath producing oyster mushrooms below the old station and selling them in the farmers' market upstairs.


Coleford Community Centre - energy efficiency

The second instalment of our article on the work we have been undertaking at Coleford Community Centre is now available:

Part 2 article on Energy Performance at Coleford Community Centre



BS10 Passivhaus

@Markleach @georgefergusonx Enjoyed a good meeting with BS10 (Southmead) Planning Group yesterday with @REFurnival. Residents very receptive to #Passivhaus - cheap to run, sustainable, comfortable healthy homes #Bristol.



Meeting Stephen Williams MP on Housing Standards

I met @SWilliamsMP - Minister for Communitities and Local Govt (and my local MP) today to discuss housing standards.  He confirmed that local authorities would continue to be able to set their own building energy standards until Zero Carbon Housing was introduced in 2016.  He did recognise that Zero Carbon Housing was not really zero carbon but seemed confident that the Zero Carbon Hub had everything in hand eg quality on site, performance gap etc.  I'd have liked to have talked about linear thermal bridging and psi values, as I see this as an ongoing problem which is currently being fudged and will continue to be until SAP takes measurements externally. I really don't think he would have understood though so I didn't bother.  

I asked him for support for Bristol Green Capital and he sugested that Bristol could aim to meet the 2016 Building Regulations in advance of them being introduced.  Not exactly innovative or imaginative!


Ancre Hill Winery - new straw bale winery building going up 

Ancre Hill Estates is an organic winery in Monmouth specialising in quality sparkling wines made in the champenooise style.

We have been helping them with energy aspects of the design of their new winery building where wine will be made, aged and stored.  

The new building is a steel portal frame farm building with straw bale walls and sedum roof. Attention has been paid within the design to making the building airtight and thermal bridge free.

The building has specific temperature requirements in different rooms and at different times of year.  

To  minimse energy use the building will have no heating or cooling systems.  

Ventilation is required to remove CO2 that is generated by the fermentation process. We have been working with Green Building Store to develop a control system for the Paul Novus 450 Mechanical Ventilation with Heat Recovery (MVHR) unit, which is able to manage the CO2, maintain humidity levels and provide adequate night cooling in summer.  

The building is being built by G Adams Construction with training and supervision in straw bale construction from the Doret Centre for Rural Skills.