I have recently purchased a 1975 singlewide mobile home (2x4 construction with aluminum panel siding). The unit has a Coleman electric furnace (no heat pump), storm windows and rather minimal insulation throughout. I am trying to decide what improvements (if any) would be justified. The trailer is located in the Seattle area where temperatures rarely get below the high 20's and air conditioning is considered to be a (rarely necessary) luxury.
A heat pump is probably out of the question due to cost.
I am considering re-insulating the floor, removing the original "rodent barrier" and R-7 (more/less) insulation, replacing same with R-19 stuffed between joists plus duct insulation, etc. I've figured the cost of materials at around $400.
I've also been told (but haven't confirmed) that it would be possible to add "blown in" insulation to the ceiling for around $300. I haven't determined the current insulation up there, but it is probably R-13 or R-19.
I'm planning to replace both doors (hollow core) with current R-5 (or better) models.
I have also thought about looking at a NEW electric furnace/air handler. However, I've received mixed reviews as to whether newer units are really any more efficient than the originals. (However, a new one would likely be QUIETER.)
I would greatly appreciate comments on these issues or any other suggestions that might yield improvement. Do-it-yourself approaches are most likely to be implemented.
Thanks!
MTW