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Starduct – Belimo VAV boxes

VAV box presentation: box types, construction, Belimo controls, testing and AHRI certification, selection, installation and training.

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VAV BOX · VARIABLE AIR VOLUME TERMINAL

Starduct – Belimo VAV boxes

Zone airflow terminals with Belimo controls — made at the Starduct factory, Hanoi. S-VAV-S is listed in the AHRI Directory.

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Made in the Starduct factory, tested by independent laboratoriesMade in the Starduct factory, tested by independent laboratoriesMade in the Starduct factory, tested by independent laboratories

Made in Vietnam · Supplied to 17 markets

Made in the Starduct factory, tested by independent laboratories

AMCA · AHRI · ASHRAE · VISRAEMember of international and Vietnamese HVAC engineering associations
UL · FM · Intertek · IBST · VIBMRegular testing and certification with independent laboratories
5 patentsGranted in Vietnam
In-house aerodynamic test labPressure drop, airflow and leakage measured at the factory

“Vietnamese engineering can do it — and do it better.”

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S-VAV-S core valve, AHRI 880 / 885 certified

VAV BOX · VARIABLE AIR VOLUME TERMINAL

S-VAV-S core valve, AHRI 880 / 885 certified

The S-VAV-S core valve has Intertek reports and AHRI 880 / 885 certification for each size; figures for the other ranges state their basis in the catalogue.

9Starduct – Belimo VAV box ranges
7S-VAV-S sizes certified to AHRI 880 / 885
12Intertek test reports (AHRI 880 / 885, ASHRAE 130)

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Zone airflow control, independent of duct pressure

OVERVIEW

Zone airflow control, independent of duct pressure

01How it worksThe S-VAV-S single-duct box is the terminal of a pressure-independent VAV system: the flow sensor measures the inlet airflow and the Belimo controller holds it at the set point between Vmin and Vmax as the room requires.
02ApplicationsOffices, hotels, hospitals and schools with zone-varying cooling loads · Pressure-independent VAV systems with variable-speed AHUs · Fresh-air flow and CO₂-based air quality control
03Starduct – BelimoCasing, damper and sensor are made in the Starduct factory; controller and room devices are supplied by Belimo (Switzerland).
04ProtocolsBMS integration via BACnet MS/TP or Modbus RTU

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VAV BOX TYPES

Single duct, dual duct, reheat, parallel fan, compact

Single duct, round S-VAV-S Single duct, round 4–16″ Single duct, rectangular S-VAV-R Single duct, rectangular Calculated – not tested Dual duct S-VAV-D Dual duct Calculated – not tested Compact, fresh air S-MV Compact, fresh air DN 80–400 Calculated – not tested Reheat S-VAV-SW / S-VAV-SE / S-VAV-SP Reheat 4–16″ Calculated – not tested Parallel fan S-VAV-PF / S-VAV-PFW / S-VAV-PFE Parallel fan 8–12″ Calculated – not tested Single-duct VAV, long body with integrated electric heater S-VAV-LE Single-duct VAV, long body with integrated electric heater 8–12″ Calculated – not tested Round mechanical self-powered CAV for round duct S-CAV-R Round mechanical self-powered CAV for round duct Ø80 – 400 mm (9) Calculated – not tested

S-VAV-S: measured by Intertek, listed in the AHRI Directory. Models labelled “Calculated – not tested” carry no AHRI label.

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Materials as registered with AHRI

S-VAV-S CONSTRUCTION

Materials as registered with AHRI

01CasingZ.A.M Zinmag coated steel (Nam Kim Group, Vietnam), 0.8 mm (21 gauge), coating 270 g/m²
02Damper bladeSingle-skin Zinmag steel 0.8 mm; EPDM rubber edge seal
03Acoustic and thermal liningFibre-free closed-cell foam, egg-crate surface, 25 mm thick, average density 85 kg/m³; λ = 0.037 W/m·K at 24 °C
04Flow sensorMulti-point cross, centre-averaging, anodised aluminium A6061

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Belimo ZoneEase

BELIMO CONTROLS

Belimo ZoneEase

01Zone controllerBelimo ZoneEase VAV: zone controller with integrated damper actuator, configured via cloud and smartphone (NFC), 19 selectable control applications.
0222RT-A001Room unit with display, white / black, MP-Bus, NFC, 1 digital input
0322DT-12L · 22DC-11Duct temperature sensor (auto changeover) · return-duct CO₂ sensor (optional)
04Power supply24 V AC via transformer in the control enclosure; input 220 V 50 Hz or 120 V 60 Hz to order

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TESTING & CERTIFICATION

Intertek reports and AHRI certification

AHRI 880 / 885 · ASHRAE 130-2025Measured by Intertek at rated airflow, 375 Pa: discharge Lw, radiated Lw, MOP. Latest test of each size. Sensor K and F factors; casing and damper leakage 125 – 1245 Pa. Sizes 4″, 6″, 8″, 10″, 12″.
Intertek reports AHRI 880 / AHRI 885 106451837CRT-001 (2026), 106082023CRT-001 (2025), 106451844CRT-001 (2026), 106451821CRT-001 (2026), 106451855CRT-001 (2026), 105752019CRT-001r1 (2024), 106082030CRT-001 (2025)ASHRAE 130-2025 106491634CRT-001a (2025), 106363362CRT-001a (2025), 106491634CRT-001b (2025), 106363362CRT-001b (2025), 106363362CRT-001c (2025)
AHRI Certified AHRI Ref 213355061–213355067 AHRI 880 / 885 · S-VAV-S-04 / 05 / 06 / 08 / 10 / 12 / 14 Issued 20/05/2026
ISO 9001 · ISO 14001ISO 9001:2015 (VN-10161-QMS) · ISO 14001:2015 (VN-10038-EMS).

Sizes not on the certificate list (interpolated or extrapolated from neighbouring sizes) carry no AHRI label. AHRI certification is renewed annually.

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OTHER MODELS

Calculated – not tested

S-VAV-R — Single duct, rectangularCalculated per ASHRAE; no AHRI label.
S-VAV-D — Dual ductCalculated from the S-VAV-S core valve; no AHRI label.
S-MV — Compact, fresh airCalculated; no AHRI label.
S-VAV-SW / SE / SP — ReheatCalculated; no AHRI label.
S-VAV-PF / PFW / PFE — Parallel fanCalculated; no AHRI label.
S-VAV-LE — Single-duct VAV, long body with integrated electric heaterElectrical safety testing in preparation; no AHRI label for the assembly.

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SELECTING A VAV BOX

Four steps to size a box

01AirflowDetermine the zone maximum airflow Vmax (m³/h or L/s) and the minimum Vmin required for ventilation.
02Pick the sizeChoose the size where Vmax is 0.75 – 1.25 × rated airflow (inlet velocity 7.5 – 12.5 m/s); inlet velocity at Vmin must not be below 1 m/s for a reliable sensor signal.
03Minimum pressureCheck that the available static pressure drop across the box exceeds the MOP at Vmax.
04NoiseRead discharge and radiated NC at Vmax and the design ΔPs; compare with the room NC limit.

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From installation to operation

INSTALLATION, O&M & TRAINING

From installation to operation

01InstallationCorrect installation is required for accurate sensing and for the catalogue sound data to apply.
02O&M manualO&M manual in five languages under Documents on the model pages.
03TrainingVAV training course on the website's Training page: lectures and handbook.
04Companion toolsElectric reheat selection table and the VAV ROI calculator on the website.

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CONTACT

Select, submit and order

Size units in the quick selector, download catalogues and DoPs from the product pages, and send your list for a quotation.

Emailkinhdoanh@nsca.vn
Phone(+84) 90 323 2222
FactoryDan Phuong Industrial Cluster Phase 2, Dan Phuong Commune, Hanoi City, Vietnam

Product pages Quick selector Test reports & certificates Request a quote

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