Plano · Frisco · DFW · North Texas
We add a local-only Home Assistant brain to your existing HVAC, sprinkler system, and pool — making them respond to your actual backyard in milliseconds, by hardware running in your mechanical room. The system keeps working through internet outages, power flickers, and the slow death of any vendor's cloud API. Every decision is an entity you can see.
Texas drought rules don't care about your lawn schedule. We replace your sprinkler controller with OpenSprinkler and drive it from real soil-moisture sensors, current rain rate, and the 5-day forecast — watering driven by what your dirt actually needs.
A backyard lightning detector triggers shelter announcements when a strike lands inside three miles. The same signal holds the HVAC compressor through power flickers, so your air conditioner doesn't short-cycle itself into an early grave.
No Honeywell cloud. No Ecowitt cloud. No GPS shared with a Companion app. Every device runs on a Raspberry Pi in your mechanical room. Two days without internet and the house still knows whether to cool down.
Two entry tiers, two add-ons, one bundled all-in-one. Most full-bundle installs in Plano land between $5,500 – $7,000 depending on yard size and existing wiring.
Every install includes 30 days of policy tuning. Annual maintenance available from $180 / year — we come out once a year whether you ask or not.
Full breakdown of what each bundle includes →A typical "smart" thermostat is a black box: you can ask it for the current setpoint, and that's about it. Our HVAC policy exposes every step of the computation as a named entity in Home Assistant — which room it's optimizing for, how that room compares to the hallway sensor, what the dewpoint bias is doing, why a lightning hold is engaged. Open the dashboard, and it tells you exactly why it just did what it did.
What's underneath
sensor.hvac_active_mode home
sensor.hvac_comfort_room living_room
sensor.hvac_room_delta +1.4°F # room minus hallway
sensor.hvac_room_vs_target -0.6°F # room minus target
sensor.hvac_active_cool_target 73.4°F
binary_sensor.hvac_lightning_hold offWhat you see
Presence and room selection come from your iPhone's Sleep Focus and Apple Home Away mode — no GPS, no Companion-app location permissions, nothing leaves the property.
Every install comes with a 90-day response commitment. If any automation behaves in a way you didn't expect, the founder shows up — in person or remotely — and fixes it. Not a vendor call-center: the same engineer who designed your system. The config is yours, readable, and portable, so you can take over the system yourself any time.
Built on the same reliability-engineering principles that hold up big-tech financial infrastructure and production automation used by thousands of engineers — applied to your HVAC and irrigation.
The audit is a property walkthrough — we look at your existing setup and send you a written scope with a fixed number. No obligation. Most people find it useful even if they don't move forward.
Request an audit