Question

Where two-vertical ducts to the exterior provide the combustion air, then each opening shall have a minimum free area of 1 square inch per ________ Btu/h input of gas-fired equipment in the room

Answer 1

Each opening for the combustion air ducts should have a minimum free area of 1 square inch per BTU/h input of gas-fired equipment in the room to ensure proper ventilation and combustion.

Step-by-step explanation:

In accordance with the given requirements, each opening for the combustion air ducts should have a minimum free area of 1 square inch per BTU/h input of gas-fired equipment in the room. This means that for every BTU/h of input, the opening should have 1 square inch of free area.

For example, if the gas-fired equipment in the room has an input of 10,000 BTU/h, then each opening should have a minimum free area of 10,000 square inches (10,000 x 1 square inch) to provide sufficient combustion air.

This requirement ensures proper ventilation and combustion for gas-fired equipment in the room.