Interior Climate Control

8.1   Draft felt at electrical outlet
8.2   Air infiltration through windows and doors
8.3   Kitchen or bath fans allow cold air infiltration or drafts
8.4   Condensation in attic space
8.5   Condensation and/or frost on windows
8.6   Condensation on interior ductwork and air handling equipment
8.7   Inadequate heating
8.8   Noisy ductwork
8.9   Ductwork makes noise when floor is walked on - commonly known as oil canning
8.10 Noise can be heard at register
8.11 Ductwork comes apart
8.12 Condensate line is blocked
8.13 Air conditioning coolant line leaks
8.14 There are gaps between heat diffusers, cold air return grilles and ventilation grilles
       and the adjacent surface
8.15 Blockage in vent of high efficiency furnace