Vent-a-hood PRH18M30SS Installation

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Read and Save These Instructions

All Hoods Must Be Installed By A Qualied Installer

INSTALLATION INSTRUCTIONS

WALL MOUNT RANGE HOOD WITH

M600 OR M1200 BLOWER

Read All Instructions Thoroughly Before Beginning Installation

WARNING - TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK,

OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:

A. Installation work and electrical wiring must be done by qualied person(s)

in accordance with all applicable codes and standards, including re­rated construction. Switch power off at service panel and lock the service
disconnecting means to prevent power from being switched on accidentally

during installation.

B. When cutting or drilling into wall or ceiling, do not damage electrical wiring

and other hidden utilities.

C. Ducted fans must always be vented to the outdoors.

D. Sufcient air is needed for proper combustion and exhausting of gases

through the ue (chimney) of fuel burning equipment to prevent back
drafting. Follow the heating equipment manufacturer’s guideline and
safety standards such as those published by the National Fire Protection
Association (NFPA), and the American Society for Heating, Refrigeration
and Air Conditioning Engineers (ASHRAE), and local code authorities.

E. ASHRAE residential ventilation standard 62.2 limits exhaust fans (total) to

a maximum of 15 CFM per 100 square feet of occupiable space, unless a
back drafting test is performed or make-up air is provided. Consult a local
HVAC engineer for make-up air evaluation.

WARNING - TO REDUCE THE RISK OF FIRE, USE ONLY METAL

DUCTWORK

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Ducting Do’s and Don’ts

NEVER restrict the duct size. The single blower unit (M600) requires 6” round duct or equivalent
(28 square inches), and the dual blower unit (M1200) requires 10” round duct or equivalent
(79 square inches). Using Vent-A-Hood ducting products (back page) will ensure proper

efciency.

Blower Duct Size Sq. Inch Area Vent-A-Hood Transition

Single (M600) 6” round or equivalent 28” N/A
Dual (M1200) 10” round or equivalent 79” VP566 (Inlcuded)

Do not use exible or corrugated duct. This type of duct will restrict airow and reduce
performance. Only use smooth, galvanized, metal duct. Observe local codes regarding special

duct requirements and placement of duct against combustibles. Make the duct run as short
and as straight as possible with as few turns as possible. Avoid sharp-angled turns. Instead,
use smooth, gradual turns such as adjustable elbows or 45 degree angled turns. For duct runs

over 20 feet, increase the duct diameter by one inch for every ten feet of duct. A 90 degree

elbow is equal to 5 feet of duct. Using Vent-A-Hood roof jacks or wall louvers (back page) will

ensure proper efciency. Airow must not be restricted at the end of the duct run. Do not use

screen wire or spring-loaded doors on wall louvers or roof jacks. Do not terminate venting into

an attic or chimney. Where possible, seal joints with duct tape. The hood must be ducted to the

outdoors without restrictions.

YES

NO

Smooth Duct Smooth Gradual Turn Proper Combining

of Two Ducts

Flexible Duct

Sharp Angled Turns Improper Combining

of Two Ducts

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