Product Brochure

Designed and Engineered
for Years of Service
Galvanized face
plate may be
trimmed if
necessary
Sealed bearing
motor(s)
Models V1D and V2D
have 6' grounded
power cord
Models V1D and
V2D include
adjustable
dehumidistat
Easy to Install
V entilators are installed inside crawl space behind existing ventilation
opening. Screws and masonry wall anchors are included.
Models V1D & V2D
Model V1
Facts to Know About
Crawl Space Ventilation
From Mississippi State University Extension Service:
If soil is damp, as much as 20 gallons of water per
24 hours can evaporate into the air in a 1,400 sq.
ft. crawl space.
Primary causes of excess moisture include:
I Surface runoff water
I Poor ventilation
I No or poor ground vapor barrier
Signs of excess moisture in crawl space:
I Soil is wet
I Surface organism growth on floor joists
I Wet insulation
I Musty odors in crawl space or living areas
I Excessive moisture in living areas tending to
migrate towards windows
Model V1
One fan and small faceplate for
ventilation openings through brick
foundations. (Requires switch or dehu-
midistat to activate. Multiple ventilators
may be controlled by a single switch or
dehumidistat). Includes thermostat.
Model V1D
One fan and large faceplate sized for
ventilation openings through block
foundations. Includes thermostat, de-
humidistat and pre-wired 6’ power cord.
Model V2D
Two fans and large faceplate sized for
ventilation openings through block
foundations. Includes thermostat, dehu-
midistat and pre-wired 6’ power cord.
UnderAire
TM
Crawl Space Supply
Fans (Models CS1 & CS2)
Pair with V-Series fans to boost the supply of outdoor air into
crawl spaces with too few or undersized passive vents or stagnant
areas around knee walls or corners. Mounting plate can be
trimmed for smaller opening.
CS2
CS1
Thermostat
deactivates fan
below 40
0
Fto
avoid freeze-ups
Suitable for
Damp locations