Use case
HVAC Controller Production
A zone controller or smart thermostat for commercial HVAC. Long product life (10 to 15 years), with regular replacement-board orders for field-installed units. Production has to maintain firmware behavior compatibility across years.
Typical BOM characteristics
- Mains-side power supply with isolation barrier
- Relay outputs for actuators
- Sensor inputs (temperature, humidity)
- BACnet, Modbus, or KNX communication
Test plan example
- Hipot isolation test on every unit
- Relay continuity and switching test
- Sensor input verification
- Communication interop test against reference master
- Firmware version verification matched to part number
Box-build scope
- PCBA into DIN-rail or wall-mount housing
- Terminal block wiring for inputs and outputs
- Label with model, serial, certifications
- Pack with installation guide
Lead-time pattern
10 weeks NPI, 4 to 5 weeks repeat batch
Scope split
What we own
- SMT and through-hole assembly
- Hipot test station support
- FCT
- Box-build with terminal wiring
What you provide
- Firmware versioning matched to product variant
- Communication interop reference
- Housing parts
Start your hvac controller RFQ
Send a short description and your files. We respond within one business day.