Affiliate Disclosure: This section contains affiliate links. Berean Defense L.L.C. may earn a small commission if you click — at no extra cost to you.
🌡️ HVAC Tonnage & BTU Calculator
Find the right system size for your home. Oversized or undersized systems waste energy and wear out faster.
HVAC Sizing Calculator
Enter your home's details to get the recommended BTU load and system tonnage.
💰 HVAC Replacement Cost Estimator
Get a ballpark estimate for replacing your heating or cooling system before calling contractors.
System Replacement Cost Calculator
Estimates installed cost based on system type, home size, and efficiency tier.
⚡ SEER2 Energy Savings Calculator
See how much upgrading to a more efficient HVAC unit could save you each year.
Energy Savings Calculator
Compare your current system efficiency to a new high-efficiency unit.
All Free HVAC Calculators
Five tools to help you make smarter heating and cooling decisions.
HVAC Tonnage & BTU Sizer
Calculate the exact BTU and ton capacity your home requires based on size, climate, and insulation.
Use Calculator →Replacement Cost Estimator
Get a realistic cost range for replacing your AC, furnace, or heat pump before talking to contractors.
Use Calculator →Heat Pump vs. Gas Furnace
Compare upfront cost and long-term operating expenses to find the right heating system for your home.
Use Calculator →Mini-Split Sizing Calculator
Size a ductless mini-split system for one room or a whole house with multiple zones.
Use Calculator →SEER2 Energy Savings
See exactly how much money you'll save by upgrading from an old inefficient unit to a new SEER2 model.
Use Calculator →From the Blog
Homeowner guides to help you make smarter HVAC decisions.
What Size HVAC System Do I Need? A Complete Guide
Square footage alone doesn't determine system size. Learn all the factors that matter.
Read Guide →How Much Does HVAC Replacement Really Cost?
A contractor-by-contractor breakdown of what you can expect to pay for a new system.
Read Guide →How Long Do HVAC Systems Last — and When to Replace?
Know the lifespan of every component and the warning signs it's time to upgrade.
Read Guide →