Impact of ductwork airtightness on fan energy use: Calculation model and test case

Proposal of a New Method for the Characterization and Operational Air Leakages Assessment in Hvac Systems

“…As a final task, the Shut-Off model was compared with the model adopted by the DALT Standards ( §1.1) and a parameter f DALT to be used for classification was extrapolated from the characterization obtained through the Shut-Off test and the application of the related model. This is made possible by applying the relation (7):…”

“…According to Soenens et al [6], ventilationrelated energy consumption could be reduced by 30 % by completely eliminating air leakages. The analysis of consumption due to air leakages was investigated by Leprince et al [7] through experimental tests applied to a real system and undergoing tightness improvement from a leakage class of 1,5 times class A to class C (reducing leakage by a factor of 13,5 times). In this case, a reduction of electricity consumption by 46 % (versus a value of 51 % estimated by the models) was found and the non-applicability of fan laws was also discussed.…”

Investigation the Effect of Design Parameters on Air Tightness with Examples of Balikesir Houses

“…However, its stated that the data collected in these studies do not represent the existing building stock [9]. Air leakage measurements are mostly made to evaluate building design and construction quality, and countries such as England, Belgium, Czech Republic, Estonia and France have created a database to keep track of the measurement results [8]. According to the records from these databases, the average building envelope air leakage rate (n50) in Europe is around 7.50 h-1, while in other studies in Mediterranean countries, the average of air leakage rate is stated as around 7.0 h-1 [12,13].…”

“…MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions, or products referred to in the content. [1]. The building sector is responsible for one-third of greenhouse gas emissions in the world [2].…”

“…For this reason, many European countries have already established standards aimed at limiting energy consumption through the building envelope. Czech Republic, Estonia, France, Germany, Ireland and the United Kingdom identified the airtightness requirements for structures in energy performance regulations or standards [8]. Standards and regulations take into account the limitations of building envelope airtightness, and specifically the Spanish Building Regulation (CTE), which came into force in Spain in 2006, recommends the implementation of controlled ventilation systems in new and renovated buildings to ensure adequate indoor air quality [9].…”