General Guidelines for Replacing Filters

HPS 350/HPS 500 Series

	Residential	Commercial*
Pre-Filter	3 Months	Monthly
Carbon Filter	4 Months	2 Months
HEPA Filter	2.5 Years	Yearly

Buy Replacement Filters

600HS/1200HS/2000HS Series

	Residential	Commercial*
Pre-Filter	3 Months	Monthly
Carbon Filter	9 Months	4 Months
HEPA Filter	2.5 Years	Yearly
Optional Triple Blend CPZ Media Filter	9 Months	4 Months

Buy Replacement Filters

Furnace Filters

Residential	Commercial*
3-4 Months	Monthly

Buy Furnace Filters

*Chemically sensitive customers should use the Commercial guidelines.