How to talk about exhaust fans

1. Exhaust Fan Guide
This reference guide will help you decide the right fan to get for your
customer, and knowing what questions to ask to get the best solution.

2. Flat Roof Exhaust Fan Install
• This is an exhaust fan installed on a flat roof.

3. Pitched Roof Exhaust Fan Install
• This is an exhaust fan installed on a pitched roof.

4. Customer Reassurance
• If you can not find the exhaust fan or make up air fan on our website
with the exact specifications that you need, just give us a call and we
will design the fan that you need with the specifications that you
require.

5. Basic Exhaust Hood Components
https://www.youtube.com/watch?v=YZY9hkiH4N8&t=16shttps://www.youtube.com/watch?v=YZY9hkiH4N8&t=16shttps://www.youtube.com/watch?v=YZY9hkiH4N8&t=16s

6. This is a picture of the curb/flashing with exhaust fan
tilted back for inspection and cleaning.

7. What Voltage is your motor?
• The important information to get off the motor label is Voltage and Rotation of the motor
direction.

8. This is an access door for cleaning out your
duct• For every elbow in the duct you need a access panel so you can clean easily. On a multi
story building the ducting has to have access panels on every floor

9. Questions needed to ask to get the right
exhaust fan for your hood.
https://www.youtube.com/watch?v=QZD7wkF4ii4&feature=youtu.be

10. Do’s and Don'ts of ducting
• https://www.youtube.com/watch?v=8TFc0Trl9fw
• The most efficient ducting is round because it offers no resistance for
the exhausting air, and is going to create the quietest possible
installation scenario.
• Don’t ever use flex duct in a vent hood system
• A reducer can not be used in any duct work “If you have and 8” riser
your duct needs to be 8”.
• If you are going to use (2) 90 degree elbows it is recommended to have
5’ of straight ducting between those (2) 90 degree elbows to give you
the least amount of turbulence, and the best performance possible.

11. Radius Duct

12. Continued…..
Radius Duct

13. Hinge Kit Install and why you should
have one
https://www.youtube.com/watch?v=di0S9Jq13fE
NFPA requires you to have a hinge kit on all exhaust fans to allow easy access for servicing and
periodical cleaning. It can also help prevent electrical damage to the power cord by not accidently
cutting the power cord. Personal injury is also eliminated because it can be tilted and not be lifted off
the curb completely, allowing a single person to execute the task. This will also prevent damaging the
roof, because you are not having to set it down.

14. Grease gutter absorbent boom and proper routine
cleaning maintenance
https://www.youtube.com/watch?v=6PHZSGRmN_A

15. Understanding Measurements for NCA
model

16. Understanding Measurements for DU model

17. Understanding Measurements for BDU model

18. Belt Driven Exhaust Fans -vs- Direct Drive
Exhaust Fans
• A belt driven exhaust fan has a motor that is independent from the fan
blades and has a belt and pully system
• Pro’s to having a belt driven system is that it is less noisy, it cost less than a
direct drive fan motor, and more flexibility in relation to the RPM speed
• Con’s to having a belt driven system is the constant moving parts create
friction and which lead to replacing belts, and higher energy cost
• A direct driven exhaust has a motor that controls the fan by having either
an axel, or shaft connected directly to the fan blade.
• Pro’s to having a direct driven system is the fan will rotate at the same
speed as the motor rotates, it is more energy efficient because of the
reduction of friction that you have, and cost less to maintain because you
do not have to replace any belts

19. Utility Fans
• Virtually grease free roof top
• Utility fans are used for high grease applications like (Chinese food, pollo chicken)
• Easy access during maintenance
• Good for high rise buildings because it handles up to 9,000 CFM and 4.5 WG
static pressure
• Continuously welded housing and vented motor cover for weather protection

20. RDUS Utility Fan

21. Flashing & Hinges