Furnace Filters

• 20x20x5
• 16x20x5

Tried these two but they are too cheap, missing the foam line on the bottom to make a good seal

• 1
• 2

These were better

• 1
• 2

The 2 pack above was sold out, here is a 3 pack

Trying these:

• link At the time of writing this had 2x 16x20x5 and 20x20x5 MERV 13 as two options $35 per filter.

See if MERV 13 makes a noticable difference.