Beattie Passive Project
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High Quality Product Performance

The Beattie Passive system achieves superior levels of energy efficiency compared with both traditional and existing modern methods of construction.

The Beattie Passive system provides this bespoke farmhouse with very high levels of insulation and eliminates cold bridges within the structure. The house benefits from a mechanically ventilated heat recovery system (MVHR) with an integral air source heat pump. Intake air is naturally pre-heated being drawn through an underground 50m ‘earth tube’. Domestic hot water is heated by two individual air source heat pump electric cylinders run during the day whilst the sun is out and stored for night-time use. There are even three wood burners installed, more for aesthetics than as a heating source, with air tightness maintained due to the air flow channelled via a separate underfloor pipe.

Bathrooms and kitchen areas have under floor electric mats using electricity generated from a large photovoltaic array installed on the adjacent farm building roofs. This is a highly sustainable working building which is rated carbon negative.

Key Specification:

  • Built to Passive design principles with u-values of 0.11 walls and roof, and 0.07 for ground floor
  • Ceiling covered with 22mm clay board for thermal mass and cooling in summer
  • Air tightness of 0.5pa
  • Window and doors roof lights U-values of 0.9 w/km2
  • Genxi heat recovery ventilation system

Click here to view:

» SAP report
» Heatloss calculations for main building
» Heatloss calculations for annex
» Architect Tim Christy's reasons for choosing Beattie Passive

Site Details

Click the plans below to see the 'Elevations' and 'Planning Layouts' for this bespoke farmhouse.

Planning layouts for

The owners have also noticed a significant difference in the internal air quality.

“Despite having animals and five members of the family living here, the MVHR system has given us a virtually dust-free home.”

To find out more about the time, cost and environmental benefits of the Beattie Passive Build System, contact us via email, telephone +44 (0)8456 449 003 or visit


Link to project webcam

The Beattie Passive system achieves superior levels of energy efficiency.

» View the technical information

» Read our Project Blog




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