Smart Thermostats

The wall thermostat finally pulling its weight.

Nest, Ecobee, Honeywell, Sensi — installed by a C-10 crew that diagnoses the C-wire situation before swapping hardware, runs heat / cool / fan test cycles before turnover, and files the PG&E rebate paperwork on your behalf when the program is live.

Request a Walk-Through (650) 550-0719
Smart thermostat mounted on a residential interior wall

What This Is

More than a fancy round dial.

The job of a smart thermostat is not to look pretty on the wall — it is to lower the energy bill without making the house uncomfortable. Done well, a Nest 4th Gen or Ecobee Premium in a Bay Area home saves real money on PG&E (especially on Time-of-Use rate schedules) and integrates into the household automations so it gets out of the way.

Done poorly, the new thermostat short-cycles the heat pump because there is no C-wire, wakes the family at 5 AM because the "Home/Away" detection got confused, or quietly stops sending data to PG&E mid-program and forfeits the rebate. The hardware install is the easy 30 minutes; the C-wire diagnosis, the HVAC test cycles, and the eco-system commissioning are where the install earns its money.

Smart thermostat integrated into a home automation routine

Thermostat as one device in a routine, not a standalone gadget.

Scope

What is included in a thermostat install.

Diagnosis, install, test cycles, ecosystem pairing, rebate paperwork — single bid.

HVAC Compatibility Check

We read the existing thermostat wiring and HVAC system data plate before recommending hardware. Single-stage / 2-stage / heat pump / dual-fuel / variable-speed scenarios all need different specs.

C-Wire Diagnosis

Test for working C-wire at the thermostat. If absent, pull a real C-wire from the air handler, or install a Venstar Add-A-Wire or Ecobee PEK adapter as appropriate.

Thermostat Install

Mount, wire, configure for the specific HVAC system, run heat / cool / fan test cycles before turnover. Wall-patch and paint coordination if backplate footprint changes.

Room Sensor Placement

Ecobee SmartSensor placement in master bedroom, home office, etc. so the thermostat averages over actual occupied spaces, not just the hallway.

Ecosystem Pairing

Nest via Google Home / SmartThings; Ecobee, Honeywell, Sensi via their apps + HomeKit / Alexa / Google. Routine integration tested before turnover.

PG&E Rebate Paperwork

When eligible — we verify current program status, file the paperwork for the homeowner, and document model serial for the rebate claim.

Smartphone alongside connected smart-home devices including a thermostat

Models We Install

Nest, Ecobee, Honeywell, Sensi — picked per HVAC, not per shelf appeal.

Different homes need different thermostats. A single-zone heat pump with a C-wire and an iPhone household? Nest. A multi-zone home with hot/cold spots? Ecobee with room sensors. No C-wire and a tight budget? Sensi Touch on R + W only.

Google Nest Learning Thermostat (4th Gen)

Best learning algorithm, Google Home integration

Google Nest Thermostat (no-screen / value)

Cheaper, no auto-learning, still HomeKit via bridge

Ecobee SmartThermostat Premium

Includes 1 room sensor, voice + air quality monitor

Ecobee SmartThermostat Enhanced

No built-in voice, otherwise same as Premium

Honeywell Lyric T9 / T10 Pro

Room sensors, multi-zone HVAC, Honeywell Home app

Sensi Touch 2

No-C-wire support, low cost, Apple HomeKit native

FAQ

Thermostat questions, straight answers.

Most modern HVAC systems are compatible — single-stage, 2-stage and 2-stage heat pump systems are universally supported by Nest, Ecobee, Honeywell, and Sensi. Multi-stage variable-speed systems (Carrier Infinity, Trane ComfortLink, Lennox iComfort) often require their proprietary thermostat to keep full functionality. We test compatibility before purchase by reading your HVAC system data plate and the existing thermostat wiring, then tell you honestly whether a generic smart thermostat will work or whether you should stay with the proprietary controller.

The C-wire (common wire) is the 24V power return that keeps a smart thermostat continuously powered. Most older homes only have R / W / Y / G wires going to the thermostat, no C — designed for mechanical mercury-bulb thermostats that needed no constant power. Without a C-wire, smart thermostats either: (a) "power-steal" through the heating valve, causing brief HVAC cycling glitches, or (b) refuse to install at all. Solutions: pull a real C-wire from the HVAC air handler (best), use a Venstar Add-A-Wire adapter or Ecobee PEK at the air handler, or pick a thermostat designed for no-C-wire (Sensi original works on R + W only).

Nest (Google) has the better learning algorithm — figures out your schedule on its own in about a week and Home / Away routing via Google Home. Ecobee includes wireless room sensors (motion + temperature) so the thermostat does not just measure the hallway it is mounted in. For a one-zone home with simple usage: Nest. For a home with hot / cold spots, master suite at the far end, or a home office that needs separate priority: Ecobee with room sensors. Both integrate well with all major ecosystems (HomeKit, Alexa, Google Home, SmartThings).

PG&E and other Bay Area utilities have run smart-thermostat rebate programs intermittently — typically $50-$120 per qualifying device, with the list of eligible models updated yearly. BayREN (the Bay Area Regional Energy Network) also runs Home+ incentives that bundle smart thermostat install into a broader energy retrofit. Programs change frequently — we check current eligibility against your address before quote, but do not promise a specific rebate amount until we have verified.

Yes. Goodbye routine sets back to 65 / 80 (heat / cool), arms the cameras, locks the door. Welcome routine pre-warms or pre-cools 15 min before geofence arrives home. Sleep routine drops to night setting and locks out manual overrides on the wall display. All major smart thermostats integrate with HomeKit, Google Home, Alexa, and SmartThings via native or Matter-bridged paths.

Thermostat itself: $130 (Sensi Touch) up to $300 (Ecobee Premium with room sensor). Install: $150-$350 for a simple swap with existing C-wire. If a C-wire pull from the air handler is needed, plan another $250-$600 depending on path complexity. Multi-zone home with 2-3 thermostats: ~$700-$1,800 all-in including hardware. PG&E rebate (when available) offsets $50-$120 per qualifying device.

Ready to swap the thermostat?

Walk us through the HVAC.

$200 on-site walk-through. Compatibility check, C-wire status, model recommendation, fixed quote within 5 business days — applied to project total if you proceed.

Request a Walk-Through (650) 550-0719
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