Commercial HVAC Thermostat OEM and ODM Manufacturing
GK Thermostat designs and builds private-label commercial HVAC thermostats for equipment makers and controls brands in North America and Europe.
A thermostat program shaped by your equipment
GK Thermostat is an OEM and ODM manufacturing partner for commercial HVAC controls. We design and produce programmable, communicating, and line-voltage thermostats that ship under our customers' brands, built to their specifications and supported by documentation their engineers can defend.
Who we build for
Most of our programs come from three places. Equipment manufacturers need a control that matches a rooftop unit, fan coil, heat pump, or unit heater rather than a generic wall device. Controls brands need a gap in their range filled without standing up a hardware team. Mechanical and engineering firms need a private-label thermostat they can specify across a building standard and hand to a service team.
All three want the same thing: a device they can specify, document, and support without explaining someone else's logo or promising a feature that is not in the firmware.
The whole device, not just the board
A commercial thermostat is a mechanical, electrical, and software product at once. Our scope covers the enclosure, lens, overlay, terminal block, and mounting; the supply, output stage, sensor front end, display, and radio; the control sequences, schedules, setpoint limits, alarms, and protocol stacks; and the labels, manuals, and packaging in the languages the channel needs.
That matters because the failures customers remember are rarely in the part everyone reviews. They happen at the terminal block that cannot take two 14 AWG conductors, the overlay that yellows under a skylight, or the menu that a building operator cannot navigate at 6 a.m.
Where the engineering actually goes
The hard parts of this product class are unglamorous. An output stage has to survive an inductive load and a miswired install. A sensor front end has to stay accurate when the board warms up behind the display. Firmware has to fail to a defined state when a sensor opens or a valve sticks. A radio has to pass emissions while sitting centimeters from a switching supply. Line-voltage models have to hold creepage and clearance under a terminal block that a contractor will tighten with a screwdriver in a live panel.
We spend our time on those problems, and we expect to discuss them with your engineers before anyone talks about price.
Four levels of customization
Branding-only programs change the logo, colors, packaging, and default settings on a platform we already build. Configuration programs change I/O count, sensor set, protocol, and firmware parameters. Re-spin programs change the enclosure or board variant, add a radio, or move to a different display. Clean-sheet programs start from the sequence of operation and the mechanical envelope.
Each level carries a different cost, risk, and validation burden. We tell you which level your requirement actually needs, including when the answer is the lower one.
Compliance is agreed, not asserted
We do not print certificate marks on this website. Market access is a per-program exercise: the standard set depends on the destination market, the device class, and whether the product carries a radio. We fix the route at the specification stage, prepare the technical file, and coordinate testing with the laboratory the customer or we nominate. The certificate holder is named in the program agreement, and the declarations belong to the brand that sells the product.
Start with the unit
Send the equipment the thermostat controls, the voltage and load type, the sequence of operation, and the market you sell into. The OEM process page explains how that turns into a program, capabilities describes the technical envelope, and quality and compliance covers the evidence trail. If your requirement is still a paragraph, send the paragraph.