Most people land here one of two ways: something just broke and they need a repair-or-replace answer today, or they’re planning ahead and want to know what a new system costs before they call an installer. Both paths start below.
Start with the decision, not the equipment
HVAC content online mostly explains what a heat pump is. That’s rarely the reader’s actual question. The real fork is one of three decisions:
- Something broke. You have a repair quote in hand and need to know if it’s worth paying or if that money should go toward a new system instead.
- You’re planning a replacement. Your system still works but is old enough that you want to shop before it fails on you.
- You want to know what money is on the table. Federal, state, and utility programs change year to year, and buying before checking usually means leaving money unclaimed.
The guides
| Guide | For readers who | Key number |
|---|---|---|
| HVAC Repair vs. Replace: The $5,000 Rule | …have a repair quote in hand right now and need an answer today | Age (years) × repair cost ($): over $5,000 means replace |
| Best Cold-Climate Heat Pumps for 2026 | …decided to replace and want specific 2026 model picks, not category advice | Mitsubishi Hyper-Heat: $6,000–$10,000 installed per zone |
| 2025 HVAC Tax Credits and Rebates | …want to know what federal, state, and utility money still applies before buying | Utility rebates of $500–$5,000 are active in most states regardless of federal changes |
| Electric Heating & Cooling | …are weighing a full switch away from gas, not just replacing like-for-like | Whole-home electrification context beyond a single equipment swap |
Run the numbers
We write the decision framework; Thermostating runs the interactive calculators. Useful once you know which of the three decisions above you’re making:
- Repair-or-replace calculator: plug in your unit’s age and repair quote, get the same $5,000-rule math our guide walks through, done for you.
- AC size calculator and Manual J load calculator: if you’re replacing, size the new system correctly before you get quotes. Oversized and undersized systems both cost more to run.
- AC running cost calculator: what your current system actually costs to run, before you decide whether a new one pays for itself.
- Full calculator hub: all of Thermostating’s HVAC tools in one place.
Skip the research and call someone today if
- Your furnace or boiler is showing signs of a cracked heat exchanger (soot, a strange smell, or a technician has flagged it). That’s a carbon monoxide safety issue, not a research project.
- You have zero heat or zero cooling in an extreme-temperature stretch and someone in the house is medically vulnerable to it. Get a same-day repair call out first; read the guides once the house is safe.
Related reading
- Buying Guides hub: home energy equipment beyond HVAC, including solar, backup batteries, and generators.
- What’s Left of the IRA for Homeowners in 2026: the federal incentive picture after the 25C credit’s 2025 expiration.
