Installer's Guide; Section 6: Getting Started; Considerations; Draft - Heatilator ECO-ADV-WS22 Owner's Manual

6
Getting Started
A. Design and Installation Considerations
NOTICE: Check building codes prior to installation.
• Installation MUST comply with local, regional, state and
national codes and regulations.
• Consult insurance carrier, local building inspector, fi re
offi cials or authorities having jurisdiction over restrictions,
installation inspection and permits.
Before installing, determine the following:
• Type of chimney connector to be used
- Single wall, vertical or horizontal
- Double wall, vertical or horizontal
• Consult page 30 for clearances to combustibles
• Power outlet located close by for optional blower
B. Draft
Draft is the pressure difference needed to vent appliances
successfully. When a appliance is drafting successfully, all
combustion byproducts are exiting the home through the
chimney.
Considerations for successful draft include:
• Preventing negative pressure
• Location of appliance and chimney
To be sure that your appliance burns properly:
• During a low burn, the chimney draft (static pressure) should
be approximately -.04 inch water column (W.C.)
• During a high burn the chimney draft should be approximately
-.10 inch (W.C.)
• Measure the W.C at 6 inches (152mm) above the top of the
appliance after one hour of operation at each burn setting.
NOTICE: Hearth & Home Technologies assumes no
responsibility for the improper performance of the appliance
system caused by:
• Inadequate draft due to environmental conditions
• Downdrafts
• Tight sealing construction of the structure
• Mechanical exhausting devices

Installer's Guide

7057-128G • May 4, 2015
C. Negative Pressure
WARNING! Risk of Asphyxiation! Negative pressure can
cause spillage of combustion fumes and soot. Fire must draft
properly for safe operation.
Negative pressure results from the imbalance of air avail-
able for the fi replace to operate properly. It can be stron-
gest in lower levels of the house.
Causes include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustion air requirements for furnaces, water heaters
and other combustion appliances
• Clothes dryers
• Location of return-air vents to furnace or air conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks such as:
- Recessed lighting
- Attic hatch
- Duct leaks
To minimize the effects of negative air pressure:
• Install the outside air kit with the intake facing prevailing
winds during the heating season
• Ensure adequate outdoor air for all combustion appliances
and exhaust equipment
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the fi replace
• Avoid installing the fi replace near doors, walkways or small
isolated spaces
• Recessed lighting should be a "sealed can" design
• Attic hatches weather stripped or sealed
• Attic mounted duct work and air handler joints and seams
taped or sealed
• Basement installations should be avoided
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