Smart VAV Solutions for Commercial & Green Buildings

Overview

Tired of brand monopoly, high TCO, and fragile DDC programming? This decoupled VAV solution delivers Tier-1 performance at one-third the cost – with open BACnet, laptop-free tuning, and full supply chain freedom.

Traditional integrated VAV systems lock you into expensive ecosystems, force full-unit replacement on failure, and require costly software licenses.

Our open, decoupled architecture separates controller from actuator, giving you the flexibility to choose any 0-10V actuator, replace only failed components, and commission without a laptop. See how decoupled architecture cuts TCO →

Key capabilities at a glance:

● 1/3 the hardware cost of Tier-1 brands
● 43.5% lower 10-year TCO
● Native BACnet MS/TP & Modbus RTU
● Laptop-free HMI tuning (optional)
● CO₂-based DCV for LEED/WELL

Comparison: integrated VAV maintenance cost vs decoupled

Solution Architecture

Stop being forced to replace entire units when a single component fails. Stop being locked into one actuator brand. With our decoupled design, you choose the actuator that fits your budget and timeline — and replace only what breaks. That’s true hardware freedom.

Decoupled VAV controller vs integrated VAV - cost and flexibility comparison

Feature	Integrated VAV (e.g., JCI VMA, Siemens GDB)	Saswell Decoupled Solution
Actuator choice	Fixed to one brand	Any 0-10V actuator
Failure replacement	Replace entire unit	Replace only controller or actuator
BMS integration	May require gateways or proprietary tools	Native BACnet MS/TP
10-year TCO	High	43.5% lower

We advocate for the separation of Control Logic ( HDC218-VAV ) and Mechanical Drive (any 0-10V actuator).

● Ultimate Flexibility: Choose any actuator brand (Belimo, Siemens, Honeywell, etc.) based on your budget and lead time. No more forced pairing. Compare with JCI VMA → |Compare with Siemens GDB →

● Lower Operational Cost: Electronics typically have a shorter lifespan than mechanical dampers. Our decoupled design lets you replace only the failed component, reducing maintenance costs by up to 50%. Learn how decoupled architecture saves TCO →

● Native BACnet MS/TP: The controller speaks BACnet directly. No gateway, no proprietary lock-in. Plug-and-play with Tridium Niagara, JCI Metasys, Siemens Desigo, and more.

🔗 Explore full VAV controller selection guide →

Application Scenarios

Grade-A Office Towers: Dynamic Airflow for High-Occupancy Zones

Challenge: Conference rooms and open offices experience rapid occupancy changes. Fixed airflow wastes energy when spaces are empty, and under-ventilates when crowded.

Our solution: HDC218-VAV uses CO₂ sensors to trigger Demand Controlled Ventilation (DCV). Fresh air intake adjusts in real time – high oxygen during meetings, energy-saving mode when vacant.

● CO₂-based DCV – saves up to 30% AHU energy.
● Native BACnet MS/TP – plug-and-play with BMS.
● Optional HMI – laptop-free zone rebalancing

Learn how DCV helps achieve LEED/WELL →

Grade-A office VAV system with CO₂-based DCV for meeting rooms

Commercial Complexes
Centralized Energy Management

Challenge: Multi-zone buildings need consistent comfort but often suffer from simultaneous heating and cooling (energy fighting) due to poor zone coordination.

Our solution: The decoupled VAV controller with built-in 2-stage reheat logic eliminates cold-hot cancellation. Each zone operates independently, while BACnet networking enables centralized energy auditing and remote setpoint scheduling.

● 2-stage reheat (electric/hydronic) – precise temperature compensation
● Native BACnet – seamless integration with central BMS
● Independent zone control – no energy fighting

Explore hydronic reheat optimization →

Commercial complex centralized energy management with BACnet VAV controller and 2-stage reheat

Need a Solution for Critical Environments?

From laboratories to cleanrooms, our VAV safety system delivers precision pressure control, constant air changes, and real-time IAQ monitoring – all with the same decoupled, open-protocol architecture.

Explore Lab & Cleanroom VAV Safety System

Advantages

Extreme Cost Efficiency

Tier-1 performance at one-third of the hardware cost of international brands.
Decoupled Architecture

Freedom of actuator pairing to end brand monopolies once and for all.
Laptop-Free Setup

Menu-driven HMI configuration with no software licenses required.
Demand-Based Ventilation

Intelligent CO₂ linkage reduces total HVAC energy consumption by over 30%.
Native BAS Connectivity

Built-in BACnet MS/TP ensures seamless integration with Tridium Niagara, ALC WebCTRL, and JCI Metasys.

Related Products

VAV Controller

HDC218-VAV

LEARN MORE

● Power Input: 100~240VAC / 50~60Hz
● Built-in Power Conversion Module: Provides 24V/1A for damper power supply
● Built-in Digital High-Precision Differential Pressure Sensor
● Supports BACnet MS/TP and Modbus Protocols
● 3 Analog Outputs (AO), 5 Digital Outputs (DO), 3 Digital or Analog Inputs
● Can be expanded with additional I/O via HDC-IO
● Applicable for VAV Box, Venturi Valve, Variable Air Volume Valve, Lab Fume Hood Control, etc.
● Dimensions: 121 x 113 x 47.3 (mm)

The ultimate universal VAV solution designed for high-performance velocity control and seamless BACnet integration.

HMI Control

SAS965-HMI

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● Power Supply: 9~30VDC, DC Carrier Communication and Power Supply
● Display: 4-inch full capacitive touch color screen, resolution 480*480 dpi
● Temperature Display Range: 0~60°C, accuracy ±0.5°C
● Humidity Display Range: 10~99%, accuracy ±5%
● Interface: 2-wire DC carrier communication; external NTC sensor
● Optional Wi-Fi Function: Supports remote control via mobile app
● Dimensions: 86*86*11mm

Get in Touch

Contact our friendly customer service team for any questions, concerns, or suggestions. We'd love to hear from you.

Headquarters Hotline: +86 755 61218391 Headquarters Hotline +86 755 61218391

Headquarters Email: info@saswell.com

MENA Tech Support Hotline: +97155 6743682

MENA Tech Support Email: support@saswell.com