Ten years ago Brussels had some of the most energy inefficient building stock in Europe — now it boasts a groundbreaking policy that means all new buildings in the region must be passive. How did the city do it? 

The attempts to derail Dublin City Council’s proposed ‘passive house or equivalent’ planning requirement are bad news in the increasingly difficult fight to mitigate against and adapt to climate change – they risk being complicit in new buildings in the city breaching European law. 

Dún Laoghaire-Rathdown’s passive house policy also leaves the door open for alternative approaches, provided their equivalence can be demonstrated. But what does this mean? 

Thanks to fabric-first energy performance approaches such as passive house, heating demand is collapsing. So how does district heating stack up in buildings which need such little heat? 

There was a time when governments thought that simply offering grants for cavity wall insulation and heating system upgrades would be enough to stimulate mass upgrade of our building stock. But ‘shallow’ measures such as these may not be sufficient to drastically cut carbon emissions and make a real difference to occupant comfort and health, and convincing homeowners to upgrade their homes to a much higher standard will require a clever mix of psychology and smart financing 

Dublin is on the verge of taking a giant leap forward for construction, with two major authorities in the region set to make the passive house standard mandatory for new buildings. Can Ireland’s mainstream building sector rise to this challenge, and what can it learn from experience of big passive house projects across the water in the UK? 

The latest versions of PHPP and designPH are intended to make passive house design both easier and more accurate than ever before — and to plan for a future powered by renewable energy. Jan Steiger of the Passive House Institute explains the latest features of both software packages.

The Energiesprong initiative is planning to deliver drastic energy upgrades to over 100,000 homes in the Netherlands using a wildly ambitious approach to retrofitting the country’s building stock. Now the organisation has moved to the UK, where it is hoping to undertake its first projects next year.

As the climates gets warmer, overheating in buildings is likely to get worse — particularly given the modern architectural preference for huge expanses of unshaded glass. But what really causes overheating, is it really worse in low energy buildings, how do passive houses fare, and what can be done to prevent it?

For decades now, European countries have been regulating the amount of energy new buildings can consume for heating and electricity. But as these standards get ever tighter, is time to start controlling the embodied energy and wider environmental impact of building materials — and what’s the best way to do it?

The Tory government's decision to scrap the proposed zero carbon standard for new dwellings might appear to be a kick in the teeth for green building — but could the move present an opportunity for a better  standard to step in?

As previously revealed in Passive House Plus, the evidence appears to indicate that natural ventilation systems don’t adequately ventilate our homes. But does mechanical ventilation perform any better?

Low energy building isn’t complicated, but it’s easy to get wrong. Since Irish house builders downed tools en masse when the last boom ended, energy efficiency standards for new homes have seen unprecedented rises of 40% in 2008 and 60% in 2011, shooting far ahead of the UK. But with signs of a new boom emerging, can the industry get to grips with this brave new world of insulation, airtightness and thermal bridging and deliver healthy low-energy homes — or are damp and mould set to become the norm in new build?

The Passive House Institute’s announcement of new classes of passive house certification – including renewable energy generation – at this year’s International Passive House Conference caused something of a stir. Dr Benjamin Krick, the institute’s head of component certification sheds some light on the new classes and explains the rationale behind proposals which may set up passive house for a fabric first approach to near – and sub – zero energy building.

A building’s airtightness test result isn’t just an indicator of its energy efficiency – it’s an unambiguous indicator of build quality. With a little care in design and on site, airtightness targets that may seem impossibly tough are anything but, argues leading architect and certified passive house designer Simon McGuinness.

It’s sometimes said to be hard – perhaps too hard – to get a small house to meet the passive house standard. But a small house will have small heating bills, so why is it hard for a small house to be a passive house? Leading passive house consultants Alan Clarke and Nick Grant delve into the passive house software to find out what’s going on.

Such is the importance of ventilation, it’s only right and proper that the efficacy of innovative mechanical solutions such as heat recovery ventilation and demand controlled mechanical extract ventilation is established
based on robust, comprehensive evidence. But how does natural ventilation fare when subjected to the same degree of scrutiny, and can it work in low energy buildings?

Passive house is no longer just the preserve of the self-builder. With over 300 passive houses built to date in multi unit-schemes and a thousand more on the way – along with major non-domestic builds – increasing numbers of British & Irish developers are going passive. But how will the sector cope with upscaling, and will the most cost-conscious developers be attracted to the standard?

In spite of a consensus that most buildings need deep energy upgrades, both Ireland and the UK have barely scratched the surface. Joseph Curtin – one of Ireland’s leading energy policy wonks –discusses how to kick start en masse upgrade work.

Perhaps the most common argument against making passive house mainstream is that it costs too much to build. But as building regulations tighten and an increasingly competitive passive house sector emerges, does that argument hold water?

 The coming decades are expected to bring higher average temperatures, more extreme weather events – and possibly more cold snaps. But how are passive house buildings geared to adapt to a changing climate?

Progress on retrofitting Europe's building stock is sluggish, but there is a way out of the mire. 

Predicted energy usage seldom reflect actual consumption, whether in the case of typical stock or notionally low energy buildings. But how well does passive house turn theory into reality?