Innovative Positive Pressure PM 2.5 Filter Pipe for Household

Authors

  • Prasert Sumethvanich Occupational and Environmental Disease Clinic, Ko Kha Hospital

Keywords:

Particulate Matter 2.5 (PM 2.5), Positive Pressure Pipe, Air Purifier

Abstract

The research proposes to design and constructs a positive pressure PM 2.5 filter pipe for household and estimate its efficiency by comparing with general air purifiers in terms of PM 2.5 filtering, quantity of oxygen (O2) and carbon dioxide (CO2) inside the room. This designed filter pipe is a PVC plastic cylindrical pipe with a diameter of 20 centimeters and a length of 1.1 meters. The top of the pipe connects to a HEPA air filter with 7.2-watt fan mounted at the base of the filter, powered by 12-volt household power. The end of the pipe is connected to windows hole for bring air into the room. After designing and constructing, the positive pressure filter pipe was tested. It was found that the device can prevent the level of O2 for decreasing and the level of CO2 for increasing, which was significantly different compared to an air purifier (p-value < 0.001 and p-value < 0.001 respectively). In terms of PM 2.5 filtration, there was no difference between positive pressure filter pipe and air purifier (p-value 0.572). This study shows that positive pressure filter pipe is a clean air device that can maintain O2 and CO2 within safe level for residents, no risk of hypoxia and hypercapnia. There is no difference from air purifier in term of dust filtering efficiency.

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Published

2025-12-31

Issue

Vol. 5 No. 2 (2025): July – December

Section

Research article

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