How do ventilation filters work, and can they help to protect us against Covid-19? Toby Cambray weighs in on the physics of a subject that is more complex and interesting than you might expect.

Leading passive house expert Robert (Bob) Ryan is now offering certification, consultancy and training once again through his company, Earth Cycle Technologies, after a year-long career break.

Leading wastewater heat recovery (WWHR) supplier Showersave has moved its certified CPD presentation, ‘An introduction to wastewater heat recovery’, online due to the Covid-19 pandemic.

Cork-based insulation manufacturer Ecocel has published an environmental product declaration (EPD) for its cellulose insulation which reveals the product has a remarkably low carbon footprint.

How we heat our homes has a direct impact on the quality of air that we breathe. This impacts on our health. The impact is both local and national. Burning solid fuel – in an open fireplace or stove – generates fine particle pollution which affects the air in our own home and in the local neighbourhood. There are choices and actions we can take that will reduce this pollution.

In the early stages of the Covid-19 crisis, there was little official recognition that airborne transmission was a risk. Has that view changed, and what role will building ventilation play when winter approaches?

The UN’s Scott Foster says deep retrofit of our building stock, and a sustainable built environment, should be at the heart of our recovery from the Covid-19 pandemic.

With governments across Europe looking for ways to jump start their economies following the early impact of Covid-19, attention is increasingly turning to deep retrofit. But while there is strong evidence that deep retrofit could play a major role, the devil will be in the detail – and the challenge of dramatically upscaling a nascent industry shouldn’t be underestimated.

Built mostly with clay blocks and sited above the sandy shores of Seaton, on the Devon coast, this new development of eight high-end apartments not only meets the passive house ‘plus’ standard — meaning it pairs the requisite ultra-low energy fabric with a substantial amount of renewable energy generation — but it also boasts serious attention to the use of ecological and healthy material.

Covid-19 has inadvertently given us a glimpse of what sustainable living patterns might look like, and we must seize this opportunity for long-lasting positive change, says Dr Peter Rickaby.

The way we currently do post-occupancy evaluation of buildings is inadequate, says Professor Fionn Stevenson — we need new ways to measure the environmental impact of buildings, and how resilient they are to climate change.

This issue features the passive house ‘plus’ certified headquarters of Métropole Rouen Normandie, located on the banks of the Seine in Rouen, France, and designed by Jacques Ferrier Architecture.

Leading heating technology manufacturer Grant is providing those undertaking new build and retrofit projects with the opportunity to have their home heating system designed free of charge.

The inherent qualities of Amvic insulated concrete formwork (ICF) make it ideal for meeting the demands of local authorities and housing associations for fast build times and reliable delivery programmes, according to leading supplier Amvic Ireland.

Taking a temporary detour from his series of columns on the history of sustainable building and renewable energy, Dr Marc Ó Riain takes a look at Covid-19 from the perspective of Gaia theory, and at the relationship between collapsing ecosystems and the emergence of new infectious diseases.

This inspiring project may be exactly what the deep retrofit sector needs: an example of how to turn a bog standard, cold suburban home of little architectural merit into a climate champion delivering outstanding levels of energy performance, comfort and health, all while transforming the building architecturally.

A rundown 1970s scheme of one-bedroom, single storey social housing units in Ballyshannon, Co Donegal, has been transformed into a pioneering development of cosy, A-rated, NZEB-busting homes. The pioneering project – the first completed under Ireland’s deep retrofit pilot scheme – also breathed new life into an unloved green area and is expected to help fuel a regeneration project in the town.

Even though its stunning views lay directly northward, simple design, good detailing and lots of insulation have turned this 1960s semi on the edge of Dublin Bay into a warm and light-filled low energy home.

While the Covid-19 crisis has undoubtedly caused a huge amount of human suffering and economic damage, it has brought some upsides too. Mel Reynolds speculates on how much land prices may fall, and what the positive and negative impacts may be.

In the early stages of the Covid-19 crisis, there was little official recognition that airborne transmission was a risk. Has that view changed, and what role will building ventilation play when winter approaches?

Glasgow-based remote home sensing provider iOpt Assets believes its digital monitoring service can help to significantly limit maintenance visits by local authority and housing association staff, reducing one potential avenue of infection spread during the Covid-19 pandemic.

Veterinarian and passive house enthusiast Chris Copeman, whose £60,000 passive house retrofit was featured in Passive House Plus issue 29, has built a new veterinary practice in Wigan that is aiming to meet the passive house standard.

New regulations over the last decade have substantially cut operational energy use in buildings, and with more building product manufacturers now publishing environmental data on their products, now is the time to move towards in-depth life cycle assessment to reveal the full environmental footprint of our buildings, Pat Barry of the Irish Green Building Council tells Passive House Plus.

Over the past couple of months, the Irish Green Building Council (IGBC) has been focusing on helping those in the industry to upskill during the lockdown.

The Department of Housing is considering short-term changes to ventilation requirements under building regulations due to the impact of the Covid-19 crisis on the construction sector, Passive House Plus has learned.

Tipperary Energy Agency has secured significant new EU funding to further the development of its domestic retrofit programme, SuperHomes Ireland. The latest version of the scheme, dubbed ‘SuperHomes 2030’, is supported by the EU Horizon 2020 programme. The new programme will run for three years.

The National Insulation Association of Ireland (NIAI) has published guidelines on how home retrofits can safely re-start in the age of Covid-19. Construction activity recommenced in Ireland on 18 May.