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

07502 425158

Bristol, UK



Commissioning MVHR at Ancre Hill Winery

MVHR Commissioning by Andrew Farr of Green Building StoreThe MVHR at Ancre Hill Winery was designed jointly between Piers Sadler Consulting and the supplier Green Building Store.  The building has no heating or cooling so the system has been designed to help maintain near constant temperatures at 10-15o C. The system is designed to remove CO2 from the building when wine is fermenting and to keep the building cool in summer.  From Autumn to late Spring the system is automatically controlled by as 0-10V signal from CO2 sensors so that the ventilation progressively ramps up as CO2 concentrations increase. In summer when CO2 is not being generated, the summer by-pass has been specially adapted to enable air as cold as 2oC to be drawn into the building at night for cooling purposes.  The automatic control is switched to manual and the fan speed adjusted to vary the cooling.  The supply air ducts have been insulated to avoid condensation.


Four Oaks Passivhaus Project in the news

The Passivhaus Trust website featured the Four Oaks Passivhaus project in it's news section.

We are now at Building Regulations submission stage and planning to go to tender in March.  Lots more to be done on detailing the timber frame construction, glazing and heating, hot water and ventilation in coming weeks. 

For more information see projects.







Original architect visits 1970s refurbishment at Bristol Green Doors

Our 1970s refurbishment project at High Kingsdown, Bristol was showcased in Bristol Green Doors over the weekend.  One of the 100 or so visitors was the original architect of the architecturally acclaimed estate Stephen Macfarlane, pictured here with the owner.

For more information see projects.





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