Our Top Smart Thermostat Picks for KC Homes

Why upgrade an old thermostat in KC?

• Save 8–15% on heating & cooling. A learning thermostat that actually understands KC’s swing weather pays for itself in roughly one heating season.
• Catch problems before they cost you. Modern thermostats track runtime and alert you when your system runs longer than it should — an early warning sign for a failing furnace or low refrigerant.
• Remote control matters in KC. Lake of the Ozarks weekend? Adjust your home from your phone. Pipes won’t freeze, you don’t come home to a 90° house.

What to know before you buy

Check your wiring first. Most KC homes built since 1980 have a “C-wire” (common wire) at the thermostat, which all four picks above need. If you don’t have one, the Ecobee Premium and Honeywell T9 include a power-extender kit; the Nest doesn’t and may need an adapter. We can check your wiring in five minutes — just snap us a picture of the wires behind your current thermostat.

Don’t put it on an exterior wall. The #1 install mistake we see in older KC homes. A thermostat on an exterior wall reads ambient outdoor temperature drift and short-cycles your system all winter. We re-locate it if needed during install.

Pair it with a humidity strategy. KC winter air drops below 25% relative humidity inside. If you don’t pair a smart thermostat with a whole-home humidifier, you’re paying for heat that feels colder than it should. Ask us about adding one when we install.

Frequently Asked Questions

Will a smart thermostat work with my older KC furnace?

Yes, in almost every case. Smart thermostats are designed to work with the standard 24V control wiring that nearly every residential furnace in Kansas City uses, including units from the 1990s and early 2000s. The only common gotcha is needing a C-wire — which we handle during install.

How much will a smart thermostat actually save me?

Real-world savings for KC homes run $90–$220 per year on combined heating and cooling, depending on how lazy your current thermostat is and how often you’re home. The biggest savings come from automatic setback when the house is empty — a feature builder-grade thermostats don’t have.

Can I install a smart thermostat myself?

If you have the C-wire, basic tools, and you’re comfortable turning off the breaker, yes. The Ecobee and Nest both ship with thorough install videos. About 60% of our customers buy the thermostat, install it themselves, and only call us if they get stuck on the wiring or Wi-Fi. We charge $89 if you bring us in mid-install.

Should I wait for a sale?

Black Friday and Amazon Prime Day each year drop these prices 20–30%. If you can wait, you’ll save real money. If your old thermostat just died in the middle of a January cold snap, don’t wait — you’ll pay for it in heating bills.

Affiliate disclosure: Cross Mechanical participates in the Amazon Services LLC Associates Program. We earn a small commission when you buy through the links above — at no extra cost to you. We only recommend products we’ve installed in real Kansas City homes.