This from WA State Energy Code:
Any basement with a heat source must have
walls. For a basement to be considered unheated and not
require wall insulation, there must be no heat supplied.
An unheated basement must be thermally isolated
adjoining conditioned spaces. This would include:
(i.e. the floor above).
Insulated stairwell walls.
A weatherstripped access door.
Insulated and sealed ducts and pipes. From: http://docs.google.com/viewer?a=v&q=...P2rnn9nxm8UjuA
WHERE are you located?
Be safe, Gary
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!