English

The current research investigates the relative humidity conditions in Swedish dwellings (678 apartments and single-family houses), comparing measurements from the 2007/2008 BETSI-survey (heating season), with the recommendations of the EN 16798:2019. Analysis shows that 61.4% of the apartments and 29.8% of the single-family houses belong to Cats. 3 and 4, which correspond to moderate and low level of expectation, respectively (mainly due to low relative humidity).

In this extended abstract, we introduce the new IEA EBC Annex on 'Energy Efficient IAQ Management in residential buildings'. In this Annex, we address a number of challenges in implementing smart IAQ management strategies. 

Annex 68 provided us with a general framework for integrated simulation and assessment of Energy Efficiency (EE) and chemical indoor air pollution. This framework can now be further extended to develop and assess a series of smart Indoor Air Quality (IAQ) management strategies. 

As the energy poverty cannot afford the energy expenditure, their indoor environmental quality (IEQ) was affected by diverse problems from low energy efficient residential buildings. Thus, it is important to identify IEQ of energy poverty`s residential buildings to improve their well-being. However, there is no specific and diverse data on the IEQ of energy poverty in low-income housing in South Korea due to the difficulty of reaching many households and managing an amount of survey data.

ASHRAE ’s Residential IAQ Guide, published in 2018, contains practical and actionable strategies directed at multiple audiences, including builders, designers, occupants, whether they rent or own, and managers of multifamily buildings. It does this while also providing a compendium of sound scientific information for professionals who specialize in IAQ, home energy, commissioning, and those who develop programs and standards intended to transform industry practices. 

The book of proceedings of the 13th International BUILDAIR Symposium "Airtight Buildings, Thermography and Ventilation Systems in Practice",  held on June 2-3  2023 in Hannover, Germany. Contains 36 abstracts.

Worldwide, the demand for airtightness tests of tall buildings with a height of approximately 100 m is increasing. This report provides information on the planning and measurement concept for testing the entire building as a “single-zone” and presents the results and findings of the airtightness tests. The test set-up and the tests as such...

According to the two Swiss building standards Minergie-P and Minergie-A, individual dwelling units are considered measuring zones for airtightness, irrespective of whether they are in a new, renovated or modernized building. The Minergie standards focus on comfort between the dwelling units and the energy losses...

When dealing with very airtight buildings and buildings with flexible airtight roofing felts it might take several minutes for the differential pressure and air flow to level out after having changed the fan speed. Taking premature readings of the values causes measuring errors. The lecture provides pointers for test teams to avoid such measuring...

I would like to report on lessons learned in the field regarding two measurements at a special, particularly airtight and unusual building: A "concrete shell for CO2 storage in recycled concrete aggregates". Not only the building and its use for the permanent storage of CO2 in demolition concrete was unusual, but also measuring the building...

ISO 9972 describes the measurement procedure and calculation methods for determining the air permeability of buildings using the fan pressurization method. However, recent works have strongly underlined the need to improve the method's reliability to measure a building's air leakage rate described in this standard. Indeed...