ACCA Manual J & Manual D48 Verified Home Sizing Combinations

HVAC Load Sizing & Tonnage Directory

Eliminate improper equipment sizing. Whether you are replacing a residential air conditioner or installing a modern variable-speed heat pump, select your square footage and climate zone below to get the certified cooling tonnage, heating capacity, airflow CFM, and duct diameter.

Zone 1: Deep South & Gulf Coast (High Humidity)

Extremely hot and humid summers (FL, TX, LA, AZ, Southern GA). Requires high latent humidity removal.

Zone 2: Southeast & Central Warm

Hot summers with mild to moderate winters (NC, SC, TN, OK, Northern TX, Southern CA).

Zone 3: Mid-Atlantic & Lower Midwest

Balanced 4-season climate (VA, MD, PA, OH, IN, IL, MO, Pacific Northwest).

Zone 4: Northeast & Northern Plains

Mild summers but harsh sub-freezing winters (NY, New England, MI, WI, MN, CO).