When gas pipe passes through an outside wall, it must be

When sizing gas pipe systems using the tables, you will chose the table based on 

Repair work on HVAC equipment must not alter the nature of the appliance or equipment in violation of the listing and label.

The IFGC applies to the installation of all ________

Exceptions excluded, the maximum design pressure for indoor gas pipe systems shall not exceed

Using the multiple appliance vent tables, determine the furnace vent connector capacity for the illustration above.    (Use single-wall connector pipe if applicable)

Natural gas is made up primarily of (CH4) methane, is colorless, tasteless and odorless and lighter than air. it has a flamability range of approximately _________ % volume in air

Which one of the following components is used in open type motors to de-energize the start winding after the motor reaches its operating speed?

The __________________ is the amount of air pressure that remains to move the air through the ductwork after the device pressure losses have been subtracted from the rated external static pressure value of the blower.

Motors that have a service factor rating of 1.14 must have the overload protection device sized at not more than _____ percent of the motor nameplate ampere rating.