Free HVAC Tools & Calculators

Get an instant estimate for your HVAC project based on your area and system.

Got a contractor quote? See if it's fair compared to local pricing data.

Find federal, state, and local rebates you qualify for — up to $14,000 in savings.

See exactly how much money your current system is wasting every year.

Forecast your monthly heating and cooling costs for the entire year.

Calculate the exact BTU and tonnage your home needs based on climate zone, size, and features.

See how much you could save by upgrading your HVAC system.

Compare 10-year costs: your current system vs. a heat pump with rebates.

Scoring system with 5-year cost projection to decide if you should fix or upgrade.

Enter your serial number to find out how old your system is and its remaining lifespan.

HVAC just broke? Get cost estimates, safety tips, and DIY checks to try first.

Get a personalized A–F air quality grade with specific improvement recommendations.

Find out how loud your system is and see how much quieter modern systems can be.

Find the right filter size and MERV rating for your system based on your home's needs.

Rate your home's comfort and get improvement recommendations.

Answer a few questions and get a personalized system recommendation.

Never miss a filter change or tune-up. Get free email reminders.