new build + enerPHit refurbishment

Passivhaus is the leading international low-energy design standard, although the design of Passivhaus buildings addresses more than just energy efficiency.  Passivhaus also considers the health and comfort of the occupants by addressing the ventilation requirements and avoiding overheating.

Passivhaus design reduces the space heating energy demand to below 15kWh/m²/yr.  This is achieved through the design of a well-insulated, draught-free building that makes use of the available solar and internal heat gains, plus the provision of mechanical ventilation with heat recovery (MVHR). Additionally, the Passivhaus standard includes a target for unregulated energy demand (including cooking and appliances) that is no longer included in SAP calculations for building regulations.

There is considerable evidence that homes built to Passivhaus standards in Europe have resulted in significant reductions in energy demand and associated carbon emissions. Many of these homes have been monitored and shown to perform extremely close to predictions calculated using the Passivhaus Planning Package (PHPP) design software.

Why choose us?

Since 1999 we have been dedicated to sustainable building design, in 2005 we were the first consultants in Kent to apply Passivhaus principles to a new building (the Pines Calyx community building). In 2006 we started applying these principles to new houses. We now use the Passivhaus standard as our guiding principle for all new building projects and refurbishments to the EnerPHit standard. We have been to Denmark, Austria and Germany on information rallies and passivhaus events. In 2012 Paul became a Certified European Passivhaus Designer.

Whilst many passivhaus designers use petrochemical products, we apply our sustainability ethos – we will not use materials that are harmful to the environment or humans; we minimise the use of petrochemical products, plastics and other polluting materials. We have used timber frame, solid masonry and cavity wall construction, various window and ventilation systems, and completed the UK’s first industrial passivhaus in 2013.

Our Passivhaus process

Arrange Topographical and other surveys.
Develop the design and seek pre-application planning advice if appropriate.
Carry out preliminary calculations using the Passivhaus Planning Package (PHPP).
Obtain quotes for Passivhaus certification.
Planning application submission.
Detailed design and building regulations application.
Submit design for pre-construction assessment by certifier.
Liaise with engineer and other consultants.
Specification and tendering.
Prepare building contracts.
Contract administration including weekly site visits.
Arrange air leakage tests, carry out infra-red thermography.
Handover and ensure building is functioning correctly, with inspection after 12 months and 24 months.

Services available

  • Measured survey
  • Provide briefs/arrange specialist surveys eg: topographical, archaeological, arboricultural, ecological, flood risk assessment etc.
  • Passivhaus and design advice on an hourly rate or lump sum dependent on project
  • For large projects, we can act as Passivhaus and sustainability consultant
  • Design new buildings including PHPP calculations
  • Design EnerPHit refurbishment projects including PHPP calculations
  • Planning application
  • Building regulations submissions
  • Technical design (RIBA stage 5)
  • Specification and tendering, including specialist quotes for windows, ventilation, renewables
  • Contract administration including weekly site visits
  • Liaise with certifier
  • Supervise air leakage test and advise on remedial measures
  • Infra-red thermography and report