Ventry Fan Model 20EM3550, Electric

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The Ventry® Electric Fan (E-Fan), model 20EM3550, for positive pressure ventilation (PPV) and other commercial and industrial ventilation uses, is GFCI-safe, variable speed, will not exceed 15 Amps, even at start-up.. Built rugged and strong but not bulky, the fan weighs less than 80 pounds, fits in a small storage space, and moves an impressive 10,500 CFM (17,837 m3/hr).

The Ventry E-Fan combines efficient three phase technology with the all-terrain three-leg design and aircraft-style Safety Propellers exclusive to Ventry Fans. Being very quiet, low maintenance, and having zero emissions, it is also indispensable for overhaul and situations in which 100% clean air is critical.

Model 20EM3550 is the modern equivalent to previous Ventry Electric PPV Fan models 20E1.5 and 20E1.5GFCI.

ELECTRIC. An electric motor gives this fan several benefits, including: lower maintenance; no emissions; quieter operation; smoother operation; and ability to be tipped/oriented in any direction. (While most gas motors will shut down if tipped more than 20 degrees, electric fans may be aimed straight down into a man hole, straight up into an attic, or set at any angle in between.)

THREE-PHASE TECHNOLOGY. Compared to single phase systems, Three Phase offers reduced size and weight (25-50% less), delivers more power using less amperage, and allows programming of the motor to limit the power draw to 15 amps at start-up with no initial spike.

ALL-TERRAIN LEGS. Three outward curving, independently adjustable legs made of solid, aircraft-grade aluminum, each having an easy-to-grab locking knob for fast, secure adjustments. They give the fan three-point stability, unlimited tilt/aiming, and fast deployment, Legs provide a rock-solid stance and truly stand-alone operation, no matter the terrain or obstacles (snow, stairs, standing water, debris, rose bushes...).

VENTRY SAFETY PROPELLER. Smoke-busting Safety Propellers move more air with less horsepower. This quiet, two-blade, aircraft style, state-of-the-art propeller provides great efficiency and durability. Most importantly, it is fail-safe. The propeller on 20EM3550 is specifically engineered to utilize all 1.5 HP efficiently.

CLEARANCE. Up to 14 inches between propeller and ground allows no intake of foreign matter so debris won’t be picked up or plug the fan. For added safety and performance, always extend the legs on your Ventry Fan when in use, even if it’s only 6 inches!

FREE-FLOW GUARD. Un-shrouded, double reinforced wire guard allows maximum air supply to the propeller which increases air volume (CFM) and decreases noise. Video: noise drops and CFM increases as a solid shroud is removed from a Ventry Fan in this demonstration.

DUAL SIDE HANDLES AND TOP ARCHES. Side handles provide an easy, fast way for one or two people to lift and carry the fan. The frame also features tall arches on top which protects the controller from both sides and provides additional points for grabbing, carrying, and leveraging.

LONG DISTANCE VENTILATION. Like all Ventry Fans, forward sweeping propeller tips produce narrow, consistent air stream for fan placement far from the target (8-15 ft is ideal). This leaves the entry and exit clear for firefighters and hose.

WARRANTIES. Backed by 1.5-year warranties on the drive and controller, our overall 5-year “No BS” warranty on workmanship and materials, and Lifetime Factory Support.

Patent 5,503,526
Model Ventry® Electric Fan Model 20EM3550
Motor EM3550 1.5 hp / 1.1 kW
Type Electric
Propeller 20-inch 1.5 hp Ventry Safety Propeller
Volume 10,500 CFM (17,837 m3/h)
Air volume in cubic feet per minute (CFM) is measured with the fan’s legs extended.
Thrust 8.1 Lb (3.7 kg)
Based on Newton’s third law of motion, thrust is a reproducible measure of fan performance that allows easy comparison and has far fewer variables than direct measure of CFM.
Wattage 1800 watts
Input A/C drive accepts single phase input, 110V +/-10%, 50/60 Hz +/-5%
(Plugs into normal household current)
Output to Motor Three-phase; controller converts single phase to three phase
Amps 15A or less. No initial power spike, even at start-up.
Controller Variable frequency drive; allows speed from 0 to 3000 RPM
GFCI compatible Yes
Nema Plug Your choice of either a locking plug L5-15 or non-locking plug 5-15
Weight 78 Lbs (35.4 kg)
Base model without options.
(W x D x H)
Actual measurements may vary ±1/2 inch due to normal manufacturing processes. Measurements taken with legs retracted for storage. With legs fully extended, electric fans stand about 3 feet tall.
Base model fan, no wheels 23.5 x 20.5 x 23.5 inches
(59.1 x 51.4 x 59.1 cm)
Fan with Small Solid Rubber Wheels & Skids 23.5 x 21 x 23.5 inches
(59.1 x 53.3 x 59.1 cm)
Fan with Medium Flat-Free Wheels & Skids 27.5 x 22.5 x 23.5 inches
(69.9 x 57.2 x 59.1 cm)
Warranty 5 years workmanship and materials + Lifetime Factory Support
Drive and Motor Warranties 1.5 years
Listed All electrical components are UL (Underwriters Laboratories) and CSA listed (Canadian Standards Association)
Country of Origin USA. Manufactured in Hauser, Idaho, USA using only grade 8 hardware

Out of all the available options/accessories, these may be added to model 20EM3550:

SMALL SOLID RUBBER WHEELS & SKIDS. Includes 5-inch diameter, solid polyurethane wheels with ABEC-5 bearings for smooth rolling; long handle that moves up/down from the center of the fan; stair skids to protect the guard, allowing you to roll the fan easily over stairs/curbs. Ideal for urban environments and mostly smooth ground.

MEDIUM FLAT-FREE WHEELS & SKIDS. Includes 6-inch diameter wheels made of hard polyurethane which can never go flat; long handle that moves up/down from the center of the fan; stair skids to protect the guard, allowing you to roll the fan easily over stairs/curbs. Ideal for rough and unpacked terrain.

VENTRY FILTERED MISTING RING. 15-inch stainless steel ring with 8 adjustable brass nozzles and a 22 miron filter and flush valve. Connects to a standard garden hose. Dramatically decreases temperatures. Effective for cooling and rehab, salvage and overhaul, dust control, and more.

ULTIMATE DOOR STOP. Well-engineered door wedge which is so useful to firefighters that one is included on every new Ventry PPV Fan.

This video was taken in our booth at an expo and shows Ventry E-Fan Model 20EM3550 with its legs extended.

PLEASE SPECIFY THE PLUG WHEN ORDERING. Choose either twist-locking NEMA plug L5-15 (default; recommended) or non-locking NEMA plug 5-15. Other plugs available upon request.

INSUFFICIENT POWER SUPPLY. Many factors affect power supply, including other equipment drawing power from the same circuit and the gauge and length of cord into which the fan may be plugged. The electric fan’s digital display will flash a blinking red line to warn you if its power supply is insufficient for the draw. Simply turn down the fan’s variable speed to decrease the power draw. Air volume will decrease accordingly.

PRE-2004 GFCI CIRCUITS. Sensitivity issues may arise with GFCI protected circuit breakers manufactured prior to 2004. If you have trouble running equipment on a GFCI circuit that is supposed to be GFCI-compatible, you may need to upgrade the circuit breaker. For more details or to discuss, please call us.

Electric Ventry Fan Model 20EM3550 is programmed to limit its power draw at start-up to 15 Amps, with no initial spike, thereby avoiding the need for huge breakers and other protections.

This fan plugs into a normal household current (single phase) but converts it to three-phase for the motor.

For additional explanations of three phase efficiency, there is a good explanation on Wikipedia.

Variable speed drive allows for precise setting anywhere between 0 and 3000 RPM to accommodate lower power supplies.

Literature to Download / Print


Prices and products are available from our helpful Dealers and Ventry Solutions, Inc. Our product experts will help you choose the right model for your application and budget. Contact us now: (888) 257-8967