Chapter 02
Heating, Cooling & Energy
Furnaces, heat pumps, AC, insulation and what energy upgrades really pay back now that the federal credits are gone.
3 guides live4 coming this month
Start here: the full overview
Heating and Cooling Costs in 2026: Prices, Lifespans and When to Replace
What a new heat pump, AC or furnace costs in 2026, how long each system lasts, and the two rule changes this year that most HVAC quotes still get wrong.
ExplainerHeating & CoolingWhat Size HVAC System Do You Need? Why Square Footage Rules FailSquare footage alone cannot size an air conditioner or furnace. Here is how a proper load calculation works, what it costs, and...
ExplainerHeating & CoolingWhy Is My Energy Bill So High? Rate vs Usage, With 2026 DataBefore you blame your air conditioner, check whether your bill rose because you used more or because each kilowatt-hour costs...
Start here: the full overview
Heating and Cooling Costs in 2026: Prices, Lifespans and When to Replace
What a new heat pump, AC or furnace costs in 2026, how long each system lasts, and the two rule changes this year that most HVAC quotes still get wrong.
Guides in this chapter2
- ExplainerHeating & CoolingWhat Size HVAC System Do You Need? Why Square Footage Rules FailSquare footage alone cannot size an air conditioner or furnace. Here is how a proper load calculation works, what it costs, and...
- ExplainerHeating & CoolingWhy Is My Energy Bill So High? Rate vs Usage, With 2026 DataBefore you blame your air conditioner, check whether your bill rose because you used more or because each kilowatt-hour costs...