01
What size A/C do I need?
Get a starting range for your home’s cooling needs.
A LITTLE KNOWLEDGE. MORE COMFORT.
Free HVAC Tools
& Calculators
Explore our free tools to learn more about your home's heating, cooling, energy usage, and comfort.
What would you like to explore?
Choose a tool. Adjust your answers. See what changes.
02
A/C electricity cost
See how runtime and your electric rate affect running costs.
03
Repair or replace?
Compare upfront costs and your system’s reliability.
04
Mini-split size calculator
Explore a cooling range for a single room or extra space.
GO ROOM BY ROOM
Planning for a Manual J calculation?
Map your rooms and explore a preliminary cooling load range. Learn what a full professional calculation involves.
Preliminary estimator · Cooling only · Not a Manual J calculationHelpful starting points, not equipment prescriptions. Your home deserves a professional assessment before you buy.
LET’S MAKE IT PERSONAL
Need a Professional Estimate?
Contact TMerlo Air & Heating for personalized recommendations.