6.6088.1 Regional Climatic Considerations

Topic: 
Exhaust
Subtopic: 
Special Considerations
Desired Outcome: 
Regional climatic variables are taken into consideration
TitleSpecification(s)Objective(s)
6.6088.1a
Very cold

Ventilation terminations will either have no backflow dampers or will use backflow dampers that resist freezing

Soffit vents that contain a ventilation exhaust termination will be sealed within 6' of the termination

Avoid ventilation flapper freezing

Prevent exhaust moisture from entering the attic

6.6088.1b
Cold

Exhaust ventilation will be terminated at the roof, gable end, or wall

Prevent exhaust moisture from entering the attic

6.6088.1c
Mixed humid

Ventilation ducts will be insulated to R-8 or greater

Ventilation exhaust ducts will be terminated on the exterior of the building

Ventilation exhausts terminating through the soffit will direct exhaust air away from the soffit vents

Ensure condensation does not form on or in the ductwork

Ensure ventilation exhaust exits the building to the outside

Prevent exhaust moisture from entering the attic

6.6088.1d
Hot humid

Exhaust-only ventilation will not be installed

Avoid bringing moist outside air into the building