(19)
(11)EP 3 181 212 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
01.11.2017 Bulletin 2017/44

(43)Date of publication A2:
21.06.2017 Bulletin 2017/25

(21)Application number: 16205053.8

(22)Date of filing:  19.12.2016
(51)Int. Cl.: 
B01D 53/32  (2006.01)
F24F 3/16  (2006.01)
F24F 3/00  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30)Priority: 18.12.2015 US 201514974092

(71)Applicant: K & N Engineering, Inc.
Riverside, CA 92507 (US)

(72)Inventors:
  • Williams, Steve
    Beaumont, CA 92223 (US)
  • Wall, Jere James
    Helendale, CA 92342 (US)

(74)Representative: Hughes, Andrea Michelle 
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

  


(54)HVAC SYSTEM AIR FILTER


(57) An apparatus and a method are provided for a heating, ventilation, and air conditioning (HVAC) system air filter (104) for a building ventilation system. The HVAC system air filter comprises a supportive frame (148) configured to orient the HVAC system air filter within the building ventilation system. A composite filter medium (144) retained within the supportive frame comprises a cotton gauze portion and an electrostatic portion. The cotton gauze portion is configured for treatment with a filter oil composition to enhance airflow and filtration of air flowing through the composite filter medium. The electrostatic portion is configured to electrostatically attract and agglomerate airborne molecular contaminants and volatile organic compounds (VOCs) as small as 0.001 microns in diameter. In some embodiments, the composite filter medium comprises substances configured to release a fragrance into air passing through the composite filter medium.