DURABLOW® CRAWL SPACE VENTILATOR MANUAL
(M1, M2)
©2018 DURABLOW ALL RIGHTS RESERVED
(Version 20181009) Page
1
READ OWNERS INSTRUCTIONS CAREFULLY BEFORE INSTALLATION.
PLEASE REMAIN THESE INSTRUCTIONS. DO NOT THROW AWAY.
DESCRIPTION
Our DURABLOW® Crawl Space Ventilator Fan Kits are designed to enhance the circulation of outdoor air
underneath homes & corridors. In order to prevent the rotting of support columns, joists, floors & beam supports,
to lower the humidity level in Crawl Spaces is very necessary & important. In addition, humidity helps in fungus
growth, and attract termite nesting & breeding here which is harmful for wooden structure buildings / houses.
All Ventilator models are equipped with a built-in thermostat which prevents the fan operation if temperature is
below 35°F (approx. 0°C). Advanced models (M1D & M2D) are equipped with a de-humidistat which activates the
ventilator fan when the relative humidity rises above the pre-set “trigger point %”.
SPECIFICATION
MODEL M1:
MODEL M2:
Air Flow : 110 CFM,
Air Flow : 220 CFM
Rating : 115 Volts ~ 50/60 Hz,
Rating : 115 Volts ~ 50/60 Hz
0.30 Amps MAX.
0.60 Amps MAX.
Thermostat :
Thermostat:
On at 50°F, Off at 35°F
On at 50°F, Off at 35°F
Size : 14 3/8” x 6 7/8” x 2”
Size : 18” x 9” x 2”
GENERAL INFORMATION
All DURABLOW® Crawl Space Ventilators are passed factory functional & HIPOT (flashing test) tested.
Fan should operate smoothly. The wiring harness / assembly should be secured. If any damages on packing box
or item, notify the freight carrier or distributor immediately to file a damage claim / proof. Please email us if you
need any assistance. Email: info@payandpack.com
HOW TO CHOOSE YOUR CRAWL SPACE VENTILATOR
Calculate the cubical space of your crawl space with the formula LENGTH x WIDTH x HEIGHT (by feet). In order
to fully ventilate the air of the crawl space in 15 minutes (best effect in practices), divide the cubical space number
by 15 to get the minimum required air-flow CFM (models with higher CFM are always recommended).
★ EXAMPLE: 25’ x 30’ x 3.5’ of the crawl space = 2,625 cuft., then, divided by 15 = 175 CFM.
So that, at least, two M1 ventilators (110 x 2 > 175), or one M2 ventilator (220 > 175) are required.
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