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Smart thermostats have moved well past “nice to have.” In 2026, they are one of the most practical upgrades a Denver-area homeowner can make and the data backs that up. The global smart thermostat market has grown from $2.5 billion in 2021 to nearly $6 billion today, and adoption in Colorado has accelerated alongside rising Xcel Energy rates and the state’s push toward energy-efficient home systems.

That said, smart thermostats are not the right fit for every home or every budget. As HVAC contractors who install and service these systems every day, we want to give you an honest, up-to-date picture of what they actually do, what they cost, what they save, and where they fall short. Here is what you need to know in 2026.