Energy consumption of using HEPA-based portable air cleaner in residences: A monitoring study in Seattle, US

Jianbang Xiang, Ching Hsuan Huang, Elena Austin, Jeff Shirai, Yisi Liu, Edmund Seto

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Portable air cleaners (PACs), offering both auto and manual (adjustable) operation modes, are commonly used in residences. Compared with adjustable mode, auto mode's advantage of reducing indoor PM2.5 has been previously demonstrated. This study examines the energy consumption of such PACs in six residences recruited in Seattle, United States, and compares the power consumption between auto and adjustable modes. Each residence went through a one-week-long PAC filtration session under auto and adjustable modes, respectively. PAC power consumption, indoor PM2.5, temperature, and relative humidity (RH) were measured at 10-second intervals in each residence. A linear mixed-effects regression (LMER) model was used to compare the PAC power consumption between the two modes after adjusting for indoor PM2.5, temperature, and RH. Results show that the mean (standard deviation) PAC power consumption under adjustable and auto modes were 7.0 (3.5) and 6.8 (2.6) W, respectively. The average monthly energy consumption of continuous PAC operation was estimated to be ∼5 kWh for both modes. Based on the LEMR model, PAC power consumption under auto mode was approximately 3% larger than that under adjustable mode, after adjusting for living-room PM2.5, temperature, and RH levels. The implications for PAC operation mode selection in residential environments were discussed.

Original languageEnglish
Article number110773
JournalEnergy and Buildings
StatePublished - Apr 1 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.


  • Auto mode
  • Energy consumption
  • Indoor air quality (IAQ)
  • Intervention
  • PM
  • Portable air cleaner (PAC)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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