IEA annex 27: Evaluation and demonstration of domestic ventilation systems. Assessments on noise

Veld, Peter Op’t; Passlack-Zwaans, Catharine

doi:10.1016/s0378-7788(97)00051-0

Cited by 4 publications

(4 citation statements)

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“…They reported that the three most frequently selected reasons were increased energy bills (33%), system noise (30%), and an inadequate ventilation rate (23%). Since fan noise limited the use of higher ventilation rates, 9–11 this reason for not using mechanical ventilation was cited by 53% of respondents. Generally, the noise problems caused by mechanical ventilation in residential buildings have not been well investigated.…”

Section: Discussionmentioning

confidence: 99%

“…The fans used in single family dwelling typically have an A‐weighted sound power level of 60–65 dB(A). Without special soundproofing measures, bedroom noise levels of up to 45 dB(A) in rooms can be expected 9 . Hasselaar inspected ventilation in 500 homes and reported that fan noise limits the use of higher set points for the required ventilation rate and that bedrooms were poorly ventilated as a result 10 .…”

Section: Introductionmentioning

confidence: 99%

“…Without special soundproofing measures, bedroom noise levels of up to 45 dB(A) in rooms can be expected. 9 Hasselaar inspected ventilation in 500 homes and reported that fan noise limits the use of higher set points for the required ventilation rate and that bedrooms were poorly ventilated as a result. 10 A Dutch national study of 299 homes observed high noise levels due to the operation of mechanical ventilation systems.…”

Section: Introductionmentioning

confidence: 99%

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Pilot study of the effects of ventilation and ventilation noise on sleep quality in the young and elderly

et al. 2021

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Three conditions were established to investigate the effects of ventilation and related ventilation noise on sleep quality: No mechanical ventilation/low noise (A); Mechanical ventilation /low noise (B); Mechanical ventilation/high noise (C). The interventions were achieved by idling a mechanical ventilation system or operating it in two different modes. Nine young people and nine older people were all exposed to each of the three conditions for a whole night's sleep, but data from only 15 subjects were analyzed as three young subjects apparently slept with open windows in condition A. Sleep quality was measured objectively with polysomnography (PSG), which monitored signals of electroencephalogram (EEG), bilateral electrooculogram (EOG), and chin electromyogram (EMG) continuously during the sleeping period. Saliva samples were collected before sleep at night and after waking in the morning, and the concentrations of cortisol and lysozyme in them were determined. Without mechanical ventilation, the indoor CO2 level averaged about 1400 ppm during the night. Operating the mechanical ventilation decreased the indoor CO2 to below 1000 ppm, which improved objectively measured sleep quality: wake time after sleep onset (WASO) decreased on average by 15 min (p < 0.05) and sleep efficiency (SE) increased on average by about 4% (p < 0.05). Increased ventilation noise level (50.8dB(A) vs. 34.7dB(A); 54.9dB(C) vs. 48dB(C)) did not significantly change SE or WASO but did change the duration of sleep stages: It decreased the duration of deep sleep by 11min (p < 0.05) and REM sleep by 17 min (p < 0.01) and increased the duration of light sleep by 17 min (p < 0.05). The ventilation noise significantly increased the concentration of lysozyme in the elderly (p < 0.05) although no significant effects on cortisol could be shown. These results confirm that a low ventilation rate has negative effects on sleep quality and that ventilation noise at or above 50dB(A) may disrupt sleep.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pilot study of the effects of ventilation and ventilation noise on sleep quality in the young and elderly

et al. 2021

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“…In another 1997 study, Veld et al 36 considered that the acceptance and appreciation of ventilation systems is mainly determined by the perceived indoor air quality, thermal comfort and noise. Three aspects of noise were noted -external noise ingress, system generated noise, and cross-talk through ventilation ducts between rooms.…”

Section: System 4: Mvhrmentioning

confidence: 99%

Problems in Residential Design for Ventilation and Noise

HARVIE-CLARK,

SIDDALL

2023

Spring Conference Acoustics 2013

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This paper addresses three broad problems in residential design for achieving sufficient ventilation provision with reasonable internal ambient noise levels. The first problem is insufficient qualification of the ventilation conditions that should be achieved while meeting the internal ambient noise level limits. Requirements from different Planning Authorities vary widely; qualification of the ventilation condition is proposed.The second problem concerns the feasibility of natural ventilation with background ventilators; the practical result falls between Building Control and Planning Authority such that appropriate ventilation and internal noise limits may not both be achieved. Greater coordination between planning guidance and Building Regulations is suggested.The third problem concerns noise from mechanical systems that is currently entirely unregulated, yet again can preclude residents from enjoying reasonable indoor air quality and noise levels simultaneously. Surveys from over 1000 dwellings are reviewed, and suitable noise limits for mechanical services are identified. It is suggested that commissioning measurements by third party accredited bodies are required in all cases as the only reliable means to ensure that that the intended conditions are achieved in practice. 2.

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