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Replacement dwelling , South Downs , Sussex

A replacement dwelling occupying a prominent position within the South Downs National Park, designed by Meloy Architecture + Design. The arrangement of the new house as three distinct wings resulted in a high form factor. A very careful balance had to be struck between the high heat loss north facing windows and the south facing windows to avoid overheating. This was achieved through a combination of fixed shading and external venetian blinds.

ASHP for heating and hot water with concealed PV on the flat ridges.

Passivhaus and Carbon/Energy statistics:

TFA: 249.5 m².
Building Form Factor: 3.98 with average wall and roof U-value 0.097 W/m²K, floor 0.109 W/m²K, and average installed whole window/door U values 0.77 W/m²K.
Overheating percentage: 2.7%.
Predicted Heating Demand: 14.9 kWh/m².yr.
Heating load: 9.4 W/m².
AC/hr @ 50 Pa: 0.32
Embodied Carbon PH15 System inc foundations: A1-A4 47.7 tonnes
Windows and doors: Katzbeck

Meets RIBA 2030 target for Operational Energy and Embodied Carbon.

Completed: May 2022

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Passivhaus Trust Member
Anti-greenwash Charter - a structured framework to ensure transparent and honest environmental communications.
Buildoffsite Property Assurance Scheme (BOPAS) was developed to address the concerns and perceived risks associated with innovative construction. BOPAS is recognised by the principal mortgage lenders as providing the necessary assurance underpinned by a warranty provision, that the property will be readily mortgageable for at least 60 years.
certified passivhaus consultant
Buildoffsite Property Assurance Scheme (BOPAS) was developed to address these concerns and perceived risks associated with innovative construction. BOPAS is recognised by the principal mortgage lenders as providing the necessary assurance underpinned by a warranty provision, that the property will be readily mortgageable for at least 60 years.