- Most North Shore homeowners see $100–$200/year in HVAC energy savings after upgrading to a smart thermostat.
- Compatibility matters — multi-stage, heat pump, or zoning systems require thermostats rated for those configurations.
- ComEd offers rebates on qualifying smart thermostats through its demand-response program.
- Legendary installs and programs smart thermostats as part of any HVAC service call or equipment replacement.
A smart thermostat makes the most sense when
Your HVAC system is less than 15 years old, you have a consistent daily schedule (or want automation to compensate for inconsistency), and your household is on a ComEd rate plan with demand-response benefits. Also ideal when pairing with a new high-efficiency system to maximize ROI.
A simple programmable thermostat may suffice when
You have a very simple single-stage system, a very consistent schedule you'll program manually, and no interest in remote access. That said, smart thermostat prices have dropped to $100–$200, narrowing the gap significantly.
Option A: Smart learning thermostat (e.g., Ecobee, Google Nest Learning)
Learns your schedule, uses occupancy sensors to avoid heating/cooling empty rooms, and integrates with ComEd's Hourly Pricing and demand-response programs. Remote access via app. Typical installed cost: $200–$350 including professional installation and programming. ComEd rebates of $50–$100 may apply. Compatible with two-stage furnaces and AC, heat pumps, and zoning systems when correctly specified.
Option B: Smart programmable thermostat (mid-tier)
Wi-Fi connected, app-controlled, schedules but no learning algorithm. Good fit for homeowners who want remote access and scheduling without auto-learning. Typical installed cost: $150–$250. Still compatible with most multi-stage systems.
Option C: Keep existing thermostat
Only makes sense if the existing thermostat is already programmable and you're actively using its scheduling features. If your existing thermostat is a manual non-programmable unit, you're leaving meaningful savings on the table — smart thermostat ROI is typically under 2 years.
Installing an incompatible thermostat on a heat pump or multi-stage system
Most basic smart thermostats are wired for single-stage systems. Heat pumps, two-stage furnaces, and zoned systems require thermostats with O/B wires and auxiliary heat control. Legendary verifies compatibility before installation.
Missing the C-wire requirement
Smart thermostats need a common (C) wire for continuous power. Many North Shore older homes don't have C-wire run to the thermostat. Legendary adds a C-wire adapter or runs new wire as needed — part of the flat-rate install price.
Not enrolling in ComEd demand response
The biggest financial win from a smart thermostat is often the utility demand-response rebate and savings. Not enrolling leaves money on the table. Legendary walks through enrollment at installation.
Questions homeowners ask
- What ComEd rebate is available for smart thermostats?
- ComEd's Smart Thermostat Program typically offers $50–$100 in rebates for qualifying Wi-Fi smart thermostats enrolled in their demand-response program. Rebate amounts change annually. Winnetka Electric customers should check with the Winnetka municipal utility.
- Will a smart thermostat work with my two-stage furnace?
- Yes, provided you select a thermostat rated for two-stage (dual-fuel, or multi-stage) systems. Legendary verifies compatibility and programs staging correctly during installation.
- Can Legendary install any brand of smart thermostat?
- Yes. Legendary installs Ecobee, Google Nest, Daikin-compatible smart controls, and other brands. We'll recommend based on your system type and utility program eligibility.
Editorial provenance
Content by Legendary Service editorial team
Updated:
Methodology
Guidance compares the stated system factors, applicable utility program rules, and the conditions that must be confirmed in the home. Figures are planning ranges, not quotes; Legendary Service provides an upfront flat-rate price after diagnosis.