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GAC-DMB — Smart Multi-Function Thermostat GAC-DMB

GAC-DMB — Smart Multi-Function Thermostat GAC-DMB

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Product Overview

GAC-DMB — Smart Multi-Function Thermostat GAC-DMB

Model: Model: GAC-DMB |Category: Category: HVAC

The Tianshi GAC-DMB is a smart multi-function thermostat engineered by Zhejiang Tianshi Electric (est. 2000) for the HVAC segment of the Smart Home portfolio. It is designed for Tuya / Zigbee 3.0 ecosystems, supports Alexa & Google Home voice control, and complies with CE, RoHS, FCC, IEC 62368-1 and the Tuya Develop certification programme. Listed for export to 30+ countries across the Middle East, Africa, Europe and Southeast Asia.

Why Specify GAC-DMB?

Four engineering decisions that turn this device into a project-grade specification.

Ground-up commercial focus

Designed for FCU and VRF integrators, not retrofitted from a residential thermostat — Modbus, dry-contact and 0–10 V on-board.

BMS and Matter at once

RS485 Modbus for legacy BMS, Matter for future-proofing, in a single SKU.

±0.5 °C stability

High-resolution NTC pair plus PI control loop keep guest comfort tight — measurable on TripAdvisor scores.

Hospitality-tuned UI

Glass touch face with welcome-mode, do-not-disturb and SOS scenes built in — no firmware customisation needed.

Detailed Specifications

Datasheet excerpts — full datasheet PDF available on request.

Parameter

Value

Model

GAC-DMB

Application

FCU + boiler + electric heating

Display

3.5" full-touch capacitive

Accuracy

±0.5 °C dual NTC

Protocol

Wi-Fi + RS485 + Matter

Power

AC 100–240 V

Certifications & Compliance

Authoritativeness signals — independent third-party verification of every test marked above.

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CE Marking (EU)

EN 60669-1 / EMC Directive 2014/30/EU

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UKCA

BS1363, UK market

SQM.jpg

SASO / SQM (Saudi Arabia)

SABER-registered for KSA customs clearance

CE.png

SONCAP (Nigeria)

Standards Organisation of Nigeria Conformity Assessment

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GCC / G-mark

Gulf Cooperation Council

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ECAS

UAE market

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RoHS 2.0

Free of lead, cadmium, mercury, hexavalent chromium

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CB Scheme

IECEE certificate, fast-track recognition in 50+ countries

Typical Application Scenarios

•see scene image: GAC-DMB-hvac-corporate-executive-office.png
Hvac Corporate Executive Office

•see scene image: GAC-DMB-hvac-corporate-executive-office.png

•see scene image: GAC-DMB-hvac-luxury-villa-master-bedroom.png
Hvac Luxury Villa Master Bedroom

•see scene image: GAC-DMB-hvac-luxury-villa-master-bedroom.png

•see scene image: GAC-DMB-hvac-presidential-suite-control.png
Hvac Presidential Suite Control

•see scene image: GAC-DMB-hvac-presidential-suite-control.png

Frequently Asked Questions

Q: Which HVAC systems are compatible?
Fan-coil units (FCU), VRF/VRV, gas/electric heating, central A/C and floor-heating loops via dry contacts. See the wiring page in each manual.
Q: Does it support 2-pipe / 4-pipe FCU?
Yes, configurable via the app with up to 4 stages cooling/heating.
Q: Can it be tied into a BMS?
Yes — Modbus RTU (RS485) or Modbus TCP gateway optional; KNX retrofit available on request.
Q: What temperature accuracy is delivered?
±0.5 °C with internal NTC sensor; external sensor input is supported on selected SKUs for floor-temperature feedback.
Q: Can multiple thermostats be linked?
Yes, via the Tianshi gateway you can group up to 32 zones with master/slave logic.
Q: Does it remember settings after a power outage?
Yes, last setpoints + mode are written to non-volatile memory and resumed automatically.

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