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 like an AXC or MBI. The simple through-the-wall solution allows for mounting on the exterior of a building.

As for construction, a heavy gauge, galvanized steel housing with a baked epoxy finish provides a long life. The built-in backdraft damper helps to prevent air leakage. Additionally, EXT fans combine a quiet and efficient backward curved impeller with a powerful and speed controllable motor.

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 4 inch duct; airflow capacities to 177 cfm

Accessories

A full range of accessories is available to suit each application:

• BDD backdraft dampers 
• Digital timer to speed controls (see all available  fan controls)
• Mounting clamps to flexible insulated duct (see all available fan accessories)
• Supply and exhaust grilles

When it comes to choosing the right duct, people often ask, “What is the best duct for bathroom ventilation?” While there isn’t necessarily one absolute right choice, many times the best option is the flexible insulated duct.  Learn more in our blog posting: what-is-the-best-duct-for-bathroom-ventilation.

Applications

There are a variety of ventilation applications for an EXT Fan. In addition to bathroom ventilation, applications include ground floor installations, tight attic spaces, high rise buildings, apartments/townhouses as well as basement washrooms or kitchens are applications for EXT Fans.

Airflow Performance (cfm)

Visit CFM Select to utilize Continental Fan’s state-of-the-art fan selection and quotation platform.

Fan Dimensions for EXT External Mount Bathroom Fans

• See 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.