What Size AC Do I Need in St. Petersburg, FL?
Plan AC sizing for a St. Petersburg, Florida home with local climate, building details, Manual J, matched equipment, airflow, and moisture—not square feet alon.
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What Size AC Do I Need in Port St. Lucie, FL?
Plan AC sizing for a Port St. Lucie, Florida home with local climate, building details, Manual J, matched equipment, airflow, and moisture—not square feet alon.
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What Size AC Do I Need in Brownsville, TX?
Plan AC sizing for a Brownsville, Texas home with local climate, building details, Manual J, matched equipment, airflow, and moisture—not square feet alone.
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What Size AC Do I Need in Baton Rouge, LA?
Plan AC sizing for a Baton Rouge, Louisiana home with local climate, building details, Manual J, matched equipment, airflow, and moisture—not square feet alone.
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Room Cooling Capacity Screening for Mini-Split Planning
This tool screens one room’s cooling capacity with the public ENERGY STAR room-air-conditioner table. It does not size a complete mini-split system, select an indoor head, calculate a room heating load, or determine an outdoor unit. Use the result only as an early room-cooling reference before a room-by-room load calculation and manufacturer selection workflow. What…
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Window AC BTU Calculator: What Size Unit Do You Need?
Choose a window air conditioner by the room load, not whole-house central-AC tonnage. Start with room square footage, then account for ceiling height, sun, occupancy, kitchen heat, insulation, and local climate. ENERGY STAR room-size foundation The calculator uses the current ENERGY STAR room-air-conditioner capacity bins as its base. Examples include 5,000 BTU/h for up to…
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HVAC Load Calculator: Heating and Sensible Cooling Estimate
An HVAC load is the rate of heat a building gains in summer or loses in winter. This calculator estimates a winter heating screening load and a summer sensible cooling screening load from envelope conductance, sensible air leakage, indoor and outdoor design temperatures, entered window solar gain, and entered internal sensible gains. It is intentionally…
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What Size AC Do I Need in Houston, TX?
If you are asking, “What size AC do I need in Houston?”, the useful answer is not a square-footage shortcut. Two houses with the same floor area can have very different cooling loads because their windows, insulation, attic, duct location, air leakage, orientation, occupancy, and indoor humidity goals are different. Houston adds a demanding combination:…
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Mini-Split Heating Capacity in Cold Weather: Reading the Data
Read mini-split cold-weather heating capacity by separating rated and maximum output, design temperature, defrost effects, room load and backup needs.
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Multi-Zone Mini-Split Sizing: Capacity, Diversity, and Head Selection
Size a multi-zone mini-split by checking room loads, connected capacity, diversity, minimum output and manufacturer combination tables at design conditions.