House Maintenance Termite Control and Prevention Check all termite bait stations every three months Replace any that are eaten or moldy or too old 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. Foundation