Lasts up to 3 months but have to change every month.

Fast delivery and these fit our new unit perfectly. Will buy again.

Best air filters I hVe found.

All stuck together so I am unable to use them

Love this brand I have pets and this does the job

This 4-pack is a trendous savings over purchasing the filters individually.

Great product at a very consumer price!

Filtrete had the smallest size particle capture. One of us has severe allergies. No brainer.

After using this once, I was amazed how much dust and other air debris it caught!!

These are excellent filters for an excellent price!!!