90DayFilter — Cleaner Air, Less Work, Real Savings

Breathe easier, protect your HVAC system, and stop changing filters every month. 
This MERV 7, 1"-thick filter is a true 90-day filter because it has an anti-microbial applied to the "downstream" side of the filter to reduce mold, bacteria, and the odors associated with them.

• Cleaner, healthier air for your home or business
• Protects your HVAC system and keeps it running efficiently
• No blow‑by — every bit of air gets filtered
• Lasts a full 90 days without becoming a mold magnet
• Convenient, economical, and built to fit right every time

This anti-microbial treated, MERV 7, 90-day, no blow-by filter by Best Living Systems is the best replacement HVAC filter on the market today!

The unique design of the BLS 90DayFilter provides an internal frame sandwiched between two layers of anti-microbial treated MERV 7 media allowing free airflow that will not strain your air conditioner and side-to-side flush edges to ensure that all the air is filtered and treated.  This filter keeps your air conditioning system cleaner AND reduces the possibility of mold and mildew growth on the duct system. 

• No cardboard frame to warp or become a food source for mold and bacteria
• No 20% blow-by that allows air to go untreated and unfiltered
• Each filter will last for three months (or more in clean environments)

You can purchase the 90DayFilter in a Convenience Pack of four (4) filters, an entire 1-year supply, for less than the cost of purchasing filters every month. Testing data (provided upon request) proves the 90DayFilter's efficiency and, since the 90DayFilter is about the price of an average 1" thirty-day filter, that makes it economical.  It is real savings that translates into an economical solution.  And, because you can have this filter delivered to your doorstep each year, there is no shopping from place to place across your city trying to find the right filter.

Features:

• 1"-thick filters, each good for 90 days
• MERV 7 ASHRAE rated standard
• NORMI approved anti-microbial  
• Internal frame eliminates paper cardboard
• Edge-to-edge design for perfect fit
• Quieter than average filters
• Easy to install, fits every time

Benefits:

• Provides adequate airflow with less restriction on HVAC system
• Eliminates bio-nesting of micro-organisms
• Eliminates blow-by so all the air is filtered
• Sturdy internal frame eliminates warping
• Standard sizes available
• Economical and Efficient: 1 pack of 4 filters = 1 year supply

Annual Subscription Option Available!

Choose the annual subscription and get a 4‑pack (one year’s supply) shipped to your door right when you need it.
A full year of filters, delivered automatically. No more guessing sizes or running to the store.

• Never run out of filters
• Right size, every time
• Delivered once a year—set it and forget it
• Costs less than buying monthly filters

How does it last 90 days when most filters only last 30?

The downstream side is treated with a safe, NORMI®‑approved antimicrobial (Triclosan) that prevents mold and bacteria from growing on the filter.
That’s what allows it to stay in place for up to 90 days without becoming a contamination source.   

How do I dispose of used filters?

Just toss them in your regular household garbage. They are not hazardous waste.

Are these really different from filters I buy at the store?

Yes, the 90DayFilter is significantly different because it:

• Keeps your HVAC system cleaner
• Reduces the chance of mold and bacteria growth
• Runs quieter
• Filters all the air, not just some of it
• Reduces waste (no cardboard, fewer filters per year)
• Provides higher‑quality indoor air