Indoor Installation; Combustible Air Supply - Takagi MOBIUS Installation And Operation Instruction Manual

INDOOR INSTALLATION

FOR INDOOR INSTALLATION: ∗CUT PRESSURE SWITCH JUMP WIRE THEN INSTALL
4" VENT PIPE DIRECTLY ON FLUE OUTLET. ∗ : PLEASE! Look inside unit.
Combustion Air Supply
The water heater should be located in an area where enough air is available for proper
combustion and ventilation of the surrounding area. Follow the latest edition of ANSI
Standard Z223.1 and any your local codes that are applicable.
In general these requirements specify that if the unit is installed in a confined space, there
must be permanent air supply openings.
Minimum recommended Air supply to water heater
Water heater size Outside air area Inside air area
Max. 235.000 BTU 59 Sq. IN 235 Sq. IN
Air Supply from Outside Building: When combustion air is supplied directly through an
outside wall, such as intake louvers openings into the dwelling. Each opening should give a
minimum free area of one square inch per 4000 BTUH of the total input ratings of all
appliances in the enclosed area.
Air Supply from Inside Building: When combustion air is supplied from inside the building,
Each opening should give a minimum free area of one square inch per 1000 BTUH of the
total input ratings of all appliances in the enclosed area. These openings should never be
less than 100 Sq. IN.
235 Sq. In.