Smart Thermostat Guide: Save Money and Stay Comfortable
A smart thermostat can save you $50-$150/year on heating and cooling. Here's how they work and which ones are worth buying.
## Heating and Cooling: Your Biggest Energy Expense
Heating and cooling account for about 50% of your home energy bill according to the [Department of Energy](https://www.energy.gov/energysaver/thermostats). A smart thermostat optimizes your HVAC system automatically, saving $50-$150 per year — meaning it pays for itself in 1-2 years.
## How Smart Thermostats Save Money
1. **Learning schedules**: Automatically adjusts temperature based on your daily patterns
2. **Occupancy detection**: Reduces heating/cooling when nobody's home
3. **Remote control**: Adjust from your phone when you forget to change settings
4. **Energy reports**: Shows your usage patterns and savings opportunities
5. **Geofencing**: Uses your phone's location to pre-heat/cool before you arrive
## Top Smart Thermostats
### Google Nest Learning Thermostat (4th Gen) — $280
The OG smart thermostat, now in its 4th generation. Learns your schedule within a week, works with Google Home, and the new design includes a higher-resolution display with a borderless design. Savings estimates displayed on-device.
### Ecobee Smart Thermostat Premium — $250
Includes a built-in Siri and Alexa speaker, air quality monitor, and remote room sensors. The sensors are Ecobee's killer feature — they prevent hot/cold spots by reading temperature in multiple rooms instead of just at the thermostat location.
### Amazon Smart Thermostat — $80
The budget king. Made by Honeywell with Alexa integration. Lacks learning features but offers scheduling, remote control, and energy savings at one-third the price.
### Honeywell T9 — $200
Remote room sensors, smart alerts for filter changes, and a touchscreen display. Compatible with most HVAC systems including multi-stage and heat pump.
### Google Nest Thermostat (Budget) — $130
Streamlined version without learning features. Simple app control, energy history, and a mirror-finish design. Best mid-range option.
## What to Look For
- **Compatibility**: Check that it works with your HVAC system (most thermostats have online compatibility checkers)
- **Remote sensors**: Essential for multi-story homes or rooms with temperature differences
- **Smart assistant**: Works with Google Home, Alexa, and/or Apple HomeKit
- **Geofencing**: Adjusts based on your phone location
- **Energy reports**: Tracks savings and usage patterns
- **C-wire**: Most smart thermostats need a C-wire (common wire) for power. Check if yours has one.
## Installation
Most smart thermostats are DIY-installable in 30-60 minutes:
1. Turn off HVAC power at the breaker
2. Remove old thermostat, note wire labels
3. Install new mounting plate and connect wires
4. Attach thermostat and restore power
5. Follow app setup for WiFi and scheduling
If you have a complex HVAC system (multi-zone, heat pump with aux heat), consider professional installation.
## Quick Savings Tips
- **Set it and forget it**: 68°F in winter, 76°F in summer when home
- **Away mode**: Drop to 60°F in winter / 85°F in summer when away
- **Sleep schedule**: Drop 3-5°F at bedtime — cooler temps improve sleep quality
- **Use auto mode**: Let the thermostat decide heating vs cooling based on conditions
## Rent to Own Smart Home Devices
Smart thermostats and other smart home devices are available through rent-to-own and lease-to-own programs with no credit check.
Browse [smart home devices](/category/smart-home) or learn about [flexible payment options](/how-it-works).