alerts & notifications
Know what’s happening before it happens.
Escalating temperatures, high water pressure, boiler leaks and so much more: get notifications and fix problems before they get out of control.

S2 snapshot
Check in on your
boiler room.
Check in on your boiler room. See wifi connectivity and monitor the boiler sensors: aqua, coil, mix, and water loss. Adjust boiler status, view history, and so much more. The snapshot is useful whether you have multiple buildings to monitor — or just one.
graphs & reporting
Get the full picture with infinite energy reports.
Change graph views, export reports, and filter for accurate reporting. Even better? Take those clear historical reports to the bank for financing — and to the courtroom.
Cutting-edge tech for blazingly fast, blazingly smart boiler controls.
THERMA AI
Leave the math to the machines
Manually modulating proper indoor temperatures is tricky. Therma AI utilizes machine learning to auto-calculate the temp and timing based on sensor input and routinely self-adjust to maintain temperature.
By running fewer heat cycles, Therma AI minimizes energy costs and gives you a much clearer look at your energy data – saving an additional 10% on top of S2’s savings.
99.99% UPTIME
S2, safe and secure
S2 runs wirelessly over your building’s wifi network, maintaining connection to sensors and accessible from anywhere. No wifi? Ethernet cable connections work as well. Plus, S2 is always online: a network of redundant servers guarantees 99.99% uptime.

control & customizability
One fast, flexible command center
With S2’s infinite configurations, you’re in control. Change temps based on average or majority readings, create rulesets to group similar zones together, and assign unique variables (like cold lines or sensitive tenants) to override rules and gain even more control. Adjust weekend and holiday setpoints, maintain special schedules, override heat cycles, and more!

Powerful, beautiful — everywhere.
Learn it once, for all.
S2 runs in the boiler room, on desktop, and on your mobile phone — same interface, same features.
Power in the palm of your hand.
Gain complete control of your boiler from our powerful mobile app, which works on iOS and Android.
Cuts through the on-site clutter.
Your boiler mechanic will access the same platform & info that you do — directly from the boiler room!
Features
S2’s unlimited capacity and smart, scalable features give you unparalleled control — and hyper-efficient heating.
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Zone Control
Control different areas of a building or complex with variable zone controls for even heat distribution.
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Auto-Staging
Set S2 to only call as needed to maintain target temperature, and control staging frequency.
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Control Alternating
Alternate boilers, pumps, or staging settings, and choose when and how often to alternate.
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Cycle Structure
ControlSet the factors that trigger cycles — space sensors, outdoor sensors, and more — based on your building’s needs.
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Valve Precision
Control valve openings by percentage points, saving energy and maintaining a better heat balance.
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Smart Building
IntegrationS2 collaborates with in-unit thermostats like Honeywell WiFi and Z-Wave to enhance resident experience.
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Timed Manual
With multiple timer options for a manual bypass, the boiler will never run indefinitely.
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Cycle Adjuster
Therma AI calculates indoor & outdoor temps and adjusts cycle lengths to maintain heat more efficiently.
The world’s smartest
boiler control system
pays for itself in under
a year.
Explore more.
ENTECH PRO
Want to boost savings? Let the pros do the work.
Trade the guesswork for more support.
Rely on our Entech Pro Specialists for 24/7 monitoring, troubleshooting, and proactive problem solving, stopping energy inefficiency in its tracks – with greater savings than S2 installation alone.