Costco's 4-pack deal brings MERV 14 filtration to $8-9 per filter — capturing pollen, smoke, bacteria, and viruses. Best for households with allergy sufferers who change filters on schedule.
The Costco 4-pack is the best per-filter price you'll find on a premium MERV 14 from 3M. Just know the 2500 series restricts airflow more than the 1900 — check your system can handle it before buying in bulk.
“Never go above MERV 10 for 1 inch filters. MERV 8 is ideal. Some units literally will pop high limit with a brand new 1 inch merv 12-13 filter in.”
r/hvacadvice · read thread →
“Be aware these are quite restrictive for air flow and can put extra stress on many hvac systems. The filtrete 1900 ones are supposed to be better. Filtration not quite as good, but they don't restrict the air flow the way the 2500 filters do.”
Slickdeals community · read full review →
“Among 3M filter lineup, the filtrete 1900 MERV 13 performs the best, while the filtrete 600 MERV 7 has the highest pressure (tied with filtrete 2400 MERV 14).”
Slickdeals (JollyBorder2428) · read full review →
