Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or ducts. You must provide
two permanent openings: one within 12 inches of the ceiling and one within
12 inches of the floor. Connect these items directly to the outdoors or spaces
open to the outdoors. These spaces include attics and crawl spaces. Fol-
low the National Fuel Gas Code, NFPA 5/ANSI Z., Section 5., Air for
Combustion and Ventilation for required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet or outlet air into attic if
attic has a thermostat-controlled power vent. Heated air entering the attic will
activate the power vent. Rework worksheet, adding the space of the adjoin-
ing unconfined space. The combined spaces must have enough fresh air to
supply all appliances in both spaces.
PRODUCT FEATURES
Safety Pilot
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot shuts off
the heater if there is not enough fresh air.
Piezo Ignition System
This heater is equipped with an automatic control system. This system requires AAA batteries (provided).
Thermostatic Heat Control (MN180TPH, MN300TPH, ML150TPH, ML250TPH models)
This heater has a control with a thermostat sensing bulb. This results in the greatest heater comfort and will
result in lower gas bills.
LOCAL CODES
This heater is designed for vent free operation. Some state and local codes prohibit the use of vent-free gas heaters.
Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of
The National Fuel Gas Code, ANSI Z223.1, also known as NFPA 54*.
*Available from:
American National Standards Institute, lnc.
1430 Broadway
New York, NY 10018
State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the
Commonwealth of Massachusetts. Sellers of unvented propane or natural gas-fired supplemental room heaters
shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit.
In the State of Massachusetts, unvented propane or natural gas-fired space heaters shall be prohibited in
bedrooms and bathrooms.
In the State of Massachusetts the gas cock must be a T-handle type. The State of Massachusetts requires that
a flexible appliance connector cannot exceed three feet in length.
National Fire Protection Association, lnc.
1 Batterymarch Park
Quincy, MA 02269-9101
Figure 2 - Ventilation Air from
Inside Building
NOTE: Base Not included. Not for
use in bedrooms or bathrooms.
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