Heating and Cooling Equipment and Appliances

Air-Conditioning Condensate Must Drain to an Approved Location

Where can AC condensate drain under the 2021 IRC?

M1411.3

Central Air-Conditioning Equipment Must Be Supported and Accessible

Can an AC condenser sit directly on dirt or an uneven pad?

M1404.1

Central Furnaces Must Meet IRC and Manufacturer Installation Rules

What code rules apply to installing a central furnace?

M1402.1

Furnace Clearance to Combustibles Depends on the Listing

How close can a furnace be to wood framing or drywall?

M1402.1

Heat Pumps Need Approved Location, Support, and Service Clearance

How much clearance does a heat pump need around the outdoor unit?

M1403.1

Heating and Cooling Equipment Must Be Sized From Building Loads

Is Manual J required when replacing an air conditioner or furnace?

M1401.3

HVAC Filters Must Be Accessible for Routine Replacement

Does code require the furnace or air handler filter to be easy to access?

M1401.1

Mini-Split Indoor Heads Need Manufacturer Clearance and Service Access

Can a mini split be installed one inch below the ceiling?

M1403.1

Return Air Must Be Located and Sized So the System Can Operate Safely

Can a furnace pull return air from a garage, closet, or mechanical room?

M1402.2