The Heelis Centre is the headquarters of the UK’s largest charity, The National Trust. The brief for the project was to create the most sustainable building possible at the time within the available budget. Named after Beatrix Potter, it houses offices, meeting spaces, and embodies the National Trust’s commitment to conservation and environmental responsibility. 

Powerhouse Telemark is an office building that aims to be carbon positive by using whole life carbon calculations to estimate the carbon that the building’s construction and lifetime use will amount to and measuring that against the energy that the building will produce over its life from renewal solar energy.

Carbon positive house is a prefabricated micro-house that is available in Australia designed by ArchiBlox and claims to be ‘Carbon Positive’ by generating more energy than it takes to build it over its predicted lifespan.

The 200m² single family house is a CO₂-neutral demonstration project. VKR Holding, which is the mother company of VELUX and VELFAC, initiated the construction of eight demonstration houses in a number of European countries following the Active House principle.

The redesign of the Everyman Theatre was no easy task. It is a newly built naturally ventilated theatre building in the middle of Liverpool with a strong link to the past and ambitious environmental goals, designed by the architects together with engineers, theatre staff and the public. It uses an earth tube in a large air plenum (void space) under the building to cool (and in winter pre-heat) the spaces that acoustically separates the spaces from the urban soundscape. Everyman is fitted with an airtight and well insulated envelope and together with the natural ventilation, the theatre manages to run with significantly less energy, compared to other performance spaces. The architects have run a post-occupancy evaluation report in 2021, and it reveals that both the staff, and customers are extremely happy with the new theatre.

Passive heating is crucial and desirable in many cold climates and in mild climates in winter time to ensure that thermal comfort is provided with minimal energy use, energy costs and CO2 emissions. This can be provided by capturing the sun’s warmth by good passive solar design (i.e. optimising orientation and window locations) and ensuring that the heat is stored in a well-insulated envelope with good use of thermal mass and passive summer-time cooling strategies to avoid building overheating. Passive heating strategies need to be ‘locked in’ at early stages because it is irreversible over the building’s lifespan.