Guides
Energy billsGuide
Heat pump vs gas furnace: which costs less to run?
It depends on two prices and two efficiencies. The formula, a worked comparison at 2026 U.S. average prices, and how to run it with your own bills.
7 min read
Rules & recallsGuide
R-410A phase-down: should you repair or replace your AC?
What the EPA refrigerant rules allow in 2026, what they mean for an existing R-410A system, and how to weigh a repair against a new one.
7 min read
CoolingGuide
What do SEER2, EER2 and HSPF2 ratings mean?
The three efficiency numbers on every central air conditioner and heat pump: what each measures, the federal minimums, and how to compare quotes.
7 min read
Rebates & costsGuide
What heat pump rebates are left in 2026, after the 25C credit ended?
The federal tax credit is gone for 2026 installs, and the federal rebate program changed its rules in May. What is still available and who qualifies.
7 min read
HeatingGuide
Do heat pumps work in cold climates?
What "cold climate" means on a heat pump spec sheet, and how to tell whether a unit will keep your home warm on the coldest nights.
9 min read