Filter Sales

If you've been searching far and wide for odd-sized replacement filters for your furnace or HVAC, Commercial Air is your answer. Our inventory includes replacement filters for dozens of furnace and HVAC manufacturers. We are sure to have the right filter for you, regardless of the age of your unit.

Ongoing maintenance is critical to the operating efficiency and long life of heating and air conditioning equipment — even more so with older units. Regular filter changes are perhaps the single most important step you can take to ensure the peak performance and longevity of your furnace.

Now it's easier than ever to get your furnace or HVAC system on a filter-changing schedule.

Quick Reference Comparison of ASHRAE Std. 52.2 and Std. 52.1

Std. 52.2 MERV	Approx. Std. 52.1 Results		Application Guidelines
Std. 52.2 MERV	Dust Spot Efficiency	Arrestance	Typical Air Filter /Cleaner Type	Typical Controlled Contaminant	Typical Applications and Limitations
20	n/a	n/a	HEPA/ULPA Filters: >99.999% efficiency on 0.10-0.20μm particles, IEST Type F	<0.30μm Particle Size Virus (unattached) Carbon dust Sea salt All combustion smoke Radon progeny	Cleanrooms Radioactive materials Pharmaceutical mfg. Carcinogenic materials Orthopedic surgery
19	n/a	n/a	>99.999% efficiency on 0.30μm particles, IEST Type D
18	n/a	n/a	>99.99% efficiency on 0.30μm particles, IEST Type C
17	n/a	n/a	>99.97% efficiency on 0.30μm particles, IEST Type A
16 15 14 13	n/a >95% 90-95% 80-90%	n/a n/a >98% >98%	Bag Filters Non-supported (flexible) microfine fiberglass or synthetic media. 300 to 900 mm (12 to 36 inch) deep, 6 to 12 pockets. Box Filters Rigid style cartridge filters 150 to 300 mm (6 to 12 inch) deep may use lofted (air laid) or paper (wet laid) media.	0.30-1.0μm Particle Size All bacteria Most tobacco smoke Droplet nuclei (sneeze) Cooking oil Most smoke Insecticide dust Copier toner Most face powder Most paint pigments	Hospital inpatient care General surgery Smoking lounges Superior commerical buildings
12 11 10 9	70-75% 60-65% 50-55% 40-45%	>95% >95% >95% >90%	Bag Filters Non-supported (flexible) microfine fiberglass or synthetic media. 300 to 900 mm (12 to 36 inch) deep, 6 to 12 pockets. Box Filters Rigid style cartridge filters 150 to 300 mm (6 to 12 inch) deep may use lofted (air laid) or paper (wet laid) media.	1.0-3.0μm Particle Size Legionella Humidifier dust Lead dust Milled flour Coal dust Auto emissions Nebulizer drops Welding fumes	Residential Better commerical buildings Hospital laboratories
8 7 6 5	30-35% 25-30% <20% <20%	>90% >90% 85-90% 80-85%	Pleated Filters Disposable, extended Surface, 25 to 100 mm (1 to 4 inch) thick with cotton-polyester blend media, cardboard frame. Cartridge Filters Graded density viscous coated cube or pocket filters, synthetic media. Throwaway Disposable synthetic media panel filter.	3.0-10.0μm Particle Size Mold Spores Hair Spray Fabric protector Dusting aids Cement dust Pudding mix Powdered milk	Commercial buildings Better residential Industrial workplaces Paint booth inlet air
4 3 2 1	<20% <20% <20% <20%	70-80% 70-75% 65-70% <65%	Throwaway Disposable fiberglass or synthetic panel filters. Washable Aluminum mesh, latex coated animal hair, or foam rubber panel filter. Electrostatic Self charging (passive) woven polycarbonate panel filter.	>10.0μm Particle Size Pollen Spanish moss Dust mites Sanding dust Spray paint dust Textile fibers Carpet fibers	Minimum filtration Residential Window air conditioners