Permits are required for which of the following.

Permits are required for which of the following.

• A. Portable cooling appliance
• B. Replacement of air conditioning unit
• C. Portable heating appliance
• D. Portable evaporative cooler

Answer: (B)

Permits are required when you perform permanent changes to a building’s mechanical system. Replacing an air conditioning unit involves altering fixed components such as electrical connections, refrigerant lines, ductwork or air handling equipment, and the mounting or support, plus ensuring proper sizing, drainage, and safety clearances. Because this work must comply with electrical, mechanical, and refrigerant codes and is subject to inspection, a permit is typically required. In contrast, portable cooling, portable heating, and portable evaporative coolers are temporary or non-permanent installations that don’t modify the building’s fixed systems, so they usually don’t need a permit.

Permits are required when you perform permanent changes to a building’s mechanical system. Replacing an air conditioning unit involves altering fixed components such as electrical connections, refrigerant lines, ductwork or air handling equipment, and the mounting or support, plus ensuring proper sizing, drainage, and safety clearances. Because this work must comply with electrical, mechanical, and refrigerant codes and is subject to inspection, a permit is typically required. In contrast, portable cooling, portable heating, and portable evaporative coolers are temporary or non-permanent installations that don’t modify the building’s fixed systems, so they usually don’t need a permit.