Tightening up: TM23 Testing building for air leakage

The latest update to the Building Regulations includes reference to a new CIBSE TM23 guide on airtightness testing. Julie Godefroy reviews the new TM, which includes a new approved air testing methodology, and considers the impact of the changes

Radical departure? Retrofitting for heat pumps

With the pressure on homeowners to replace domestic gas boilers with heat pumps, it is essential that engineers ensure that existing radiators and pipework are suitable for the lower-temperature heat source. David Palmer looks at the key considerations when upgrading a heating system

Decarbonomics: Delivering on the net zero promise

Organisations are setting ambitious 2030 targets in response to the climate emergency, but how do they decarbonise property assets in such a short period of time? Andy Pearson looks at how SNC-Lavalin is using data to assess buildings and set clients such as HM Treasury on the road to net zero

How Britain’s film industry was saved from the London fog

In the early days of cinema, the UK’s biggest studios were in central London, but pervasive fog – ‘pea-soupers’ – was entering film sets and causing huge disruption. Richard Farmer describes how pioneering air cleaning techniques saved the studios

Dual purpose: evaporative cooling

Switching between modes in dual evaporative coolers can result in large operational savings, according to a recent B&SERT paper. Tim Dwyer looks at the latest research on hybrid direct and regenerative evaporative cooling

Digging for Britain: Swaffham Prior’s heat network

Escalating energy prices and the urgent need to decarbonise means communities are looking to move away from fossil fuel as a heating source. A pioneering heat network in the Cambridgeshire village of Swaffham Prior is aiming to use a hybrid heat pump system, coupled with a solar farm, to provide ultra-low carbon, affordable heating for every resident, business and school.
Andy Pearson reports

Turning to CO2 refrigerant in large-scale retrofits

Using CO2 as a refrigerant in heat pumps is ideal for retrofits requiring higher-temperature heat. Daniel Clark, of Isentra, reports on the refurbishment of Wolfson College, which is using heat pumps for district heating and DHW

Next generation: Arup’s net zero office at 80 Charlotte Street

Arup’s all-electric office at 80 Charlotte Street London is developer Derwent London’s first net zero office scheme. Andy Pearson examines the heat and cooling strategy that combines heat pumps and chillers, and looks at how Covid affected the design and delivery of the project