EXT External Mount Bathroom Fans

Description

EXT external mount bathroom fans are the perfect solution when space restrictions prevent the use of in-line duct fans. The simple through-the-wall solution  of EXT external mount bathroom fans can be sidewall mounted on the exterior of a building, allowing easy access to the fan. EXT fans utilize a quiet and energy efficient external rotor motor. EXT external mount bathroom fans are available in three standard duct sizes: 4″, 6″ or 8″, with airflow capacities ranging from 118 cfm to 420 cfm.

Features & Benefits of External Mount Bathroom Fans

• Heavy gauge, galvanized steel housing with baked epoxy finish
• 120V operation
• May be mounted on the exterior of a building
• Enclosed motor housing for dust & lint
• Suitable for air temperatures up to 140 F / 60 C
• Energy efficient – speed controllable (optional solid state speed control)
• Rugged construction for long life
• Built-in backdraft damper
• Exceptionally quiet and efficient BC centrifugal motorized impeller
• External rotor motor design results in superior motor cooling and durability
• Permanently lubricated ball bearing motor for maintenance-free operation
• Automatic reset thermal overload protection
• Fan and motor are precision balanced for quiet and vibration-free operation
• Pre-wired capacitor
• Available to fit duct sizes in 4”, 6”, & 8”; airflow capacities to 445 cfm

Complete the job with our full line of fan accessories and controls.

Aiflow Performance (cfm)

Fan Dimensions

• Select the Charts / Diagrams tab below

How much airflow is required?

The following recommendations follow minimum guidelines published by the Home Ventilating Institute (HVI):

• Bathroom less than 100 square feet: – 1 cfm per square foot of floor area. A minimum of 50 cfm is the required ventilation rate.
• Bathroom larger than 100 square feet: – To calculate the proper ventilation rate, add the cfm requirement for each fixture; toilet 50 cfm, shower 50 cfm, bathtub 50 cfm, jetted tub 100 cfm.

Note: For proper sizing, the static pressure (SP) needs to be calculated. For typical applications, you may read from the 0.2” SP column for a selection.