Cut refrigeration energy waste without risking case performance.
Anti-sweat control, perfected for over 20 years. ControlTec helps grocery operators reduce anti-sweat heater runtime, verify savings, and keep display cases operating safely across every store.
Refrigeration contractor or technician? Certified Installer program
- Dew Point
- 53°F
- Frame Temp
- 60°F
- Margin
- +7°F
~60% runtime eliminated
and
One anti-sweat control platform. Three things it does better.
Engineered for Sustainability. Co-developed with one of the world's largest glass-display-door manufacturers - built to retrofit your refrigeration cases without disruption.
Self-Monitoring
Sensors on every case report through controllers that network over a self-healing wireless mesh, with built-in measurement & verification - so savings are documented, not estimated. No new network wiring, no store disruption.
Intelligent Control
Glass-door heaters run only when ambient conditions demand it. No condensation, no wasted kilowatt-hours, no compromise on product visibility.
Seamless Integration
Speaks BACnet/IP and Modbus TCP - feeds your existing EMS/BMS. No new dashboards required to get started.
The cost of always-on. Anti-sweat heaters run 24 / 7 / 365.
Heater elements sit inside every door frame, around the glass, and in the mullions to stop condensation and keep product visible. Legacy refrigeration systems simply leave them on - all day, all night, all year.
That's $10K-$38K of pure electricity per store, per year spent on heat that wasn't needed. Refrigeration is already more than half of a grocery store's energy bill - and door heaters are one of its largest single loads.
- Refrigeration is over half of a store's energy bill
- Glass-display-door heaters are one of the largest loads
- Most of that heater runtime is unnecessary
Heaters only run when they need to.
Intelligence, in real time. Watch a single refrigerated case over 24 hours. The AS‑20 keeps the frame a safe margin above the dew point - and intelligently cycles the heater only when that margin would close.
- Dew Point
- 38°F
- Frame Temp
- 44°F
- Margin
- +6°F
Two sensors. One simple rule.
Elegantly simple. The dew-point sensor reads ambient store dew point right outside the case; the frame-temp sensor reads the frame. When the frame is safely warmer than the dew point, condensation can't form - so the heater stays off. No new behavior, no store disruption.
- Sense
dew-point & frame-temp read every case
- Decide
cycle heaters only as the margin closes
- Save
~60% of heater runtime eliminated
A free rebate analysis across your whole fleet.
Have a store list? Upload your store addresses and get a per-store report within 24 business hours: utility, available rebate, estimated savings, and payback for every location. Two minutes for you. We do the rest.
One store. One self-monitoring network. Alive.
A system in concert. Watch the data flow from every case up to the gateway and out to the cloud and your building controls - then explore any node.
Live data · click a node to explore
Dual Sensors
It senses condensation before it forms.
A dew-point sensor reads the aisle-facing air; a frame-temp sensor reads the heater surface. Both are low-profile and virtually invisible.
- Dew point
- Aisle-facing
- Frame temp
- Heater surface
- Profile
- Virtually invisible
- Wiring
- Color-coded plug & play
Every case, every store - measured in one dashboard
Proof, in real time. See per-site efficiency, kWh and dollars saved, AS‑20 health score, and low-efficiency events in real time. Alerts surface the moment a heater behaves out of spec, so you fix it before it costs you.
- Per-site efficiency ranked across your regions
- Temperature alarms to your phone or email
- Documented kWh and dollars saved for M&V
Plays nicely with the systems you already run
Speaks your building's language. Open protocols mean the AS‑20 feeds your existing energy and building management, with no new dashboard required.
Real kilowatt-hours. Real carbon. Per store.
Lighter on the grid. Less energy isn't just cheaper - it's measurable progress toward your ESG goals, captured automatically by the system's metering.
Carbon equivalencies per EPA Greenhouse Gas Equivalencies Calculator · US grid avg 0.857 lb CO₂/kWh
Install the AS‑20. Get the work in your territory.
For refrigeration contractors & technicians. Manufacturer certification, a priority tech line, install work routed to certified installers, and direct incentive for replacing the legacy systems you find on service calls.
Questions, answered. Anti-sweat heater controls, explained
What is an anti-sweat heater control system?
An anti-sweat heater control system manages the heaters built into refrigerated glass display doors. Instead of running the door-frame, glass, and mullion heaters 24/7, the ControlTec AS‑20 reads dew point and frame temperature and cycles heaters only when condensation is an actual risk.
How much can the AS‑20 save per store?
A typical 100-door store saves roughly $10,000-$38,000 per year and 95,000-155,000 kWh by cutting energy use 50-80%, with payback in under two years - and faster after utility rebates.
Will running heaters less cause condensation on the glass?
No. The AS‑20 keeps each door frame a safe margin above the dew point and cycles heaters the moment that margin closes, so the glass stays clear and product stays visible, even on high-humidity days.
Does the AS‑20 integrate with our existing EMS or BMS?
Yes. The CommZ gateway speaks BACnet/IP and Modbus TCP, feeding per-case data into your existing energy or building management system, with no new dashboard required.
Is installation disruptive, and is it made in the USA?
Installation is a straightforward retrofit or factory-installed option with no store disruption. The AS‑20 is patented and made in the USA, with tens of thousands of controls already installed across thousands of store locations.
How do anti-sweat heater controls compare to other refrigeration efficiency measures?
They're typically the largest fast-payback measure available for stores with glass display doors. We publish a full ranking of all twelve supermarket refrigeration measures, by cost, savings, and payback, including the ones we don't sell.
Let's cut the kWh.
Run the numbers for your stores in 30 seconds, or talk to our team about a rollout - we even handle the utility rebate paperwork.