J3 designs, installs and services building automation systems (BAS/BMS) that put your HVAC, lighting, energy and security on one intelligent, vendor-neutral platform — so your building runs cooler, cheaper and smarter.
Most BAS shops stop at the mechanical room. J3 controls the whole building and connects it to the business inside it: we integrate HVAC and energy with the AV, lighting and security we already install, then layer on custom dashboards and AI so facilities and leadership see the same live picture.
Open protocols — BACnet, Tridium Niagara/JACE, LonWorks, Modbus — so you're never locked to one manufacturer.
Controls, AV, security and software under a single partner who owns the outcome.
Custom dashboards, reporting and AI on top of your BAS — not just a controls panel.
San Antonio–based service and support across Central Texas, with fast on-site response.
New construction or retrofit — we assess, design, install, integrate and maintain the systems that keep commercial buildings comfortable, efficient and secure.
Direct digital control of chillers, boilers, RTUs, VAV and air handlers — precise comfort with less energy waste.
Scheduling, setpoint optimization, trending and analytics that cut consumption and lower operating costs.
BACnet, Tridium Niagara/JACE, LonWorks and Modbus — we make legacy and multi-vendor systems talk to each other.
Modernize aging controls without ripping everything out — phased upgrades that protect your existing investment.
Secure remote access, alarming and proactive maintenance so small issues are caught before they become failures.
Tie access control, video and life-safety into the same platform as your mechanical systems.
Hospitals and clinics that demand tight environmental control and uptime.
Campus-wide control and energy savings across many buildings.
Secure, standards-compliant automation for public facilities and bases.
Office towers and multi-tenant properties focused on NOI and tenant comfort.
Precision cooling and monitoring where every degree and minute counts.
Hotels, plants and mixed-use sites that need reliable, efficient operations.
We assess your current controls, energy profile and pain points at no cost.
A right-sized system and phased plan with clear expected savings — no lock-in.
Controls, integration and commissioning by one accountable team.
Ongoing monitoring, service and tuning to keep the building running at its best.
Headquartered to serve San Antonio and the surrounding region — including Austin, New Braunfels, San Marcos, Boerne, Seguin and the Texas Hill Country. Local crews, fast response, and support you can actually reach.
Tell us about your facility and we'll show you where automation can cut cost and improve comfort — no obligation.
Request your evaluation →