Durability of humidity-based ventilation components after 15 years of operation in French residential buildings – Lab tests

Humidity-based DCV systems have been widely used in France for 35 years and are considered as a reference system, including for low-energy residential buildings. The on-going Performance 2 project delivers the new results of a thirteen-year monitoring in twenty-two social housing apartments. The involved consortium is composed of Cerema, Univ. Savoie Mont Blanc and two industrials partners: Aereco and Anjos. 

Smart ventilation toward an assessment of airflow imbalance and supply temperature set-points

Many countries have mandated the use of mechanical ventilation with heat recovery to limit heat loss in residential buildings. Nearly all these devices use temperature sensors to modulate bypass dampers and adjust heat recovery. These controls track a reference temperature for the supply or return air while maintaining exhaust temperatures above freezing. As a result, nearly all air-handling units (AHUs) come equipped with temperature sensors before and after the heat exchanger for both airflows.

Energy savings and exposure to VOCs of different household sizes with a smart ventilation system

Assessment methods to assess smart ventilation, in most countries focus only on comfort as criteria for the indoor air quality (IAQ), (Guyot et al., 2019). This is an issue as in doing so, pollutants that are known to cause harm to the human health are not taken into consideration while the exposure to VOCs will be elevated if the smart ventilation system lowers the ventilation flowrates to save energy (De Jonge and Laverge, 2021).

Presentation of the IEA-EBC Annex 86 and ST4-smart ventilation subtask

IEA-EBC Annex 86 “Energy Efficient IAQ Management in residential buildings” aims to propose an integrated rating method for the performance assessment and optimization of energy efficient strategies of managing the indoor air quality (IAQ) in new and existing residential buildings. Our goal is to work in an international collaboration so that the different approaches to design and operation of ventilation in different countries are accounted for.

The monitored performance of the combination of balanced ventilation with post-conditioning by an air-to-air heat pump

A balanced ventilation system can be combined with an air-to-air heat pump. Such system combines the refreshment of the air in a house with heating and cooling of the fresh air in order to influence the indoor conditions like temperature and humidity. Depending on the season in the year, various modes are used to deliver fresh air and condition the incoming air to the desired levels.  

AIVC's Technical Note 70: 40 years to build tight and ventilate right: From infiltration to smart ventilation

We are happy to announce the release of AIVC's Technical note #70: 40 years to build tight and ventilate right: From infiltration to smart ventilation!

As the AIVC was created in 1979, the 40th anniversary of the AIVC was celebrated in October 2019 at the 40th AIVC conference in Ghent. In the context of this celebration, it was decided to publish 2 overview publications:

English

Big humidity data from smart ventilation systems

A smart ventilation system is generally equipped with a range of sensors. The data – or data derived from it - collected by these sensors can be used by both building owners, occupants and managers. A new generation of IoT  enabled residential ventilation systems allows collecting and analysing this data at scale to get a better view on typical IAQ conditions in dwellings. In this paper, the results from such an analysis on the first 900 installed devices of a new model with respect to moisture in relatively new Belgian dwellings is presented. 

Smart Ventilation for Buildings (Book of Proceedings)

The Proceedings of the 39th AIVC Conference "Smart Ventilation for Buildings", held in Antibes Juan-Les-Pins, France, on 18-19 September 2018.

Smart Ventilation for Buildings (Slides)

The Presentations at the 39th AIVC Conference "Smart Ventilation for Buildings", held in Antibes Juan-Les-Pins, France, on 18-19 September 2018.

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