[Daryles]

My list of...

Air gaps...
(mice, bugs entry points)
look all around the frame underneath. Take gorilla tape and cover all the holes in the frame. As mentioned above, there is a gap where the gas line goes into the furnace/hot water heater. There is also a gap aft of this. Where the skirt meets the frame forward of the sewer pipe. There is a plastic filler in the space with a gap all the way around it.
Big gap around the middle jack legs.
Same around the front jack legs but you cant block them. This provides venting for the propane tanks.
Also gap around the water heater on the outside. Probably the same around the furnace on the outside.
Look up in the pin box. There is a big hole where the 7 way wiring goes through. Also if you look up there you will see the bedroom floor. No insulation. I added 2" pink styrofoam and taped over the hole around the wires bundle.
You can cover your stair vents in the summer (need to leave it open for furnace air return in the winter). Cover the floor air registers with magnetic covers. Trap all the cold air inside.

Put reflectix on the exterior walls of your pantry and cabinets. Also on the interior of your basement compartment doors