Indoor Air Quality A Homeowner’s Guide How to protect your heating and air conditioning equipment and enjoy cleaner air in your home

Clean air is determined by the efﬁciency of a ﬁlter or an air cleaner.

Filters have an efﬁciency rating called MERV.
(Minimum Efﬁciency Reporting Value)
MERV ratings are used to rate the ability of a ﬁlter to remove particles from the air as they pass through the ﬁlter.

The higher the MERV rating, the cleaner the air!