HVAC components that work in a commercial building can fail in a refinery, cleanroom, tunnel or archive when contamination, fire duty, pressure or material limits change.
YONGFAN organizes HVAC components around the operating risks that matter in each sector — mapping hazard classification, particulate & gas-phase cleanliness, fire smoke rating, and fluid metallurgy to robust product architectures.
Control rooms receive cooling air, yet H2S and SO2 attack electronic contacts because particulate filters were mistaken for molecular corrosion control.
Commercial fans moved into classified solvent areas match airflow but lack non-sparking impellers and Ex motors required for Zone 1/2 hazardous duties.
A HEPA filter is installed, but the final zone misses particle limits because terminal sealing, frame clamps, and room-pressure cascades were omitted.
Tunnel fans selected by free airflow fail to control smoke during emergencies because longitudinal ventilation depends on installed thrust and spacing.
01 · Hazardous & Corrosive
BT35-11 & DTF explosion-proof fans (ExdbIIBT4/CT4), PSA/DBS control room corrosion protection (ISA 71.04 G1), WGP industrial exhaust scrubbers, and titanium/Hastelloy heat exchangers.
02 · Electronics Protection
Separating particulate filtration (ZF7/8) from corrosive gas-phase filtration. DBS positive-pressure/recirculation units, PSA-PG high-volume fresh air, and CA dedicated in-room purifiers.
03 · Sub-Micron Cleanliness
Staged particulate pre/medium filtration, GCDZ ultra-low-resistance HEPA/ULPA filters (≥99.99% MPPS), GCFK shallow ceiling diffusers, and PSA airborne molecular contamination (AMC) scrubbers.
04 · Sterile Boundaries
Supporting EU GMP Annex 1 Contamination Control Strategies (CCS). GFK passive HEPA diffuser boxes, GCDZ-26Y gel-seal liquid tank filters, FFU fan filter units, and DFX purification fan boxes.
05 · Infection Control
Airside components for Airborne Infection Isolation (AII) and Protective Environment (PE) rooms per ASHRAE 170 / CDC guidance. DFX HEPA fan boxes, U-tube storage calorifiers, and RLC softeners.
06 · Comfort & Energy
Demand-based comfort systems per ASHRAE 62.1 and 90.1. YFVAV-S-T100 pressure-independent VAV boxes (Ø125–Ø400 mm), DFX ventilation fan boxes, plate heat exchangers, and dynamic balancing valves.
07 · Process & Workshop
4-72 high-pressure centrifugal fans (up to 3,200 Pa), T35-11 bifurcated fans for hot/dusty air (≤80°C), DWT-II roof fans, gasketed plate heat exchangers (up to 2.5 MPa), and JFGP electronic water treatment.
08 · Life Safety & Thrust
SDS unidirectional & SDS(R) reversible tunnel jet fans (up to 3,046 N thrust, 30s reversal), 1D/2D silencers, PYHL-14A car-park induction fans (280°C / 30 min), and DTF high-capacity ducted smoke fans.
09 · Heritage Preservation
Preventative conservation per NARA guidelines. V-Type activated carbon modules, HT refillable carbon canisters (1.7/2.6 kg carbon), low-resistance particulate pre-filters, and low-leakage airtight dampers.
| Sector Route | What It Solves | Documented Range Boundary | First Input to Confirm | Specification Action |
|---|---|---|---|---|
| Corrosive gas, hazardous ventilation, control-room protection, process utilities | BT35/DTF Ex; PSA/PSA-PG/DBS chemical | Hazard classification (Zone/Group/Temp) + Gas profile | View Sector | |
| Particulate and corrosive-gas control around electronics | DBS server/control; PSA 850–34,000 m³/h; PSA-PG to 68k | Particle/gas profile + Room pressure strategy | View Sector | |
| Staged particulate filtration and clean-air delivery | Medium filters + HEPA/ULPA scan-test; DFX H13/H14 | Cleanliness requirement + AMC chemical risk | View Sector | |
| Clean-air filtration, terminal delivery, controlled ventilation | GFK / GCFK / FFU / GCDZ-26Y gel-seal | Room/process GMP grade & ceiling void depth | View Sector | |
| Ventilation, filtration, hot water and hydronic support | DFX hospital application; U-tube storage 100–15,000 L | Room/service type (AII, PE, Ward, Plant) | View Sector | |
| Comfort ventilation, VAV control, acoustics and hydronics | DTF commercial; YFVAV-S-T100 approx. Ø125–Ø400 | Zone airflow + Sound/control target | View Sector | |
| Workshop/process exhaust, heat exchange and utility-water | T35 airstream to 80°C; 4-72 to 3,200 Pa; Plate to 2.5 MPa | Air/process temperature & static pressure | View Sector | |
| Longitudinal, ducted and emergency smoke ventilation | SDS/SDS(R) to 3,046 N thrust; Reversal in 30s | Geometry + Installed thrust / Fire mode | View Sector | |
| Particulate/gas contaminant control and low-leakage distribution | V-Type carbon; HT canisters (1.7/2.6 kg); Airtight dampers | Collection preservation requirement & target gas | View Sector |
Provide airflow (m³/h or CFM), static pressure, airstream temperature, air composition, acoustic target, and normal/fire/Ex duty.
State room dimensions, particle/cleanliness target, pressure relationship, filtration stages, and terminal ceiling architecture.
Identify target chemical gases (H2S, SO2, Cl2, NH3, VOCs) and measured concentrations in ppb/ppm where available.
Provide flow rate, primary/secondary temperatures, operating pressure, fluid chemistry, and water analysis reports.
Send your available schedule data, drawings, or project specification. YONGFAN application engineers will map your operating conditions to the correct product family.
Automated pleating and assembly with efficiency, initial resistance testing, and 100% individual scan/leak testing for HEPA and ULPA grades.
In-house impeller fabrication, dynamic balancing, run-testing for pressure and vibration, plus dedicated thrust measurement rigs for SDS tunnel jet fans.
Casing leakage verified against <1% at 1,000 Pa benchmark on DBS/PSA units, media quality assurance (iodine value ≥1,000 mg/g, CTC ≥60%), and control checks.
Built under GB150/GB151 frameworks with material verification, hydrostatic pressure testing at 1.25–1.5× design pressure, and separate-side leak checks.
Use Data Centers & Control Rooms when the main risk is protecting electronics and maintaining the room environment. Use Petrochemical & Chemical when the larger project includes hazardous process ventilation, corrosive process areas, or refinery utility systems.
Start with Semiconductor & Electronics. If the project is primarily a pharmaceutical classified room with GMP compliance requirements, use Pharmaceutical & Cleanrooms.
Use Commercial Buildings for comfort ventilation, VAV terminals, fan boxes, fire dampers, hydronic control valves, and central plant room components.
Use Hospitals & Healthcare for healthcare-specific system routing. The page connects to cleanroom filtration where surgical suites or protective environments require that architecture.
Use Industrial Facilities for workshops, high-temperature exhaust, and utility systems. Use the petrochemical page instead when classified hazardous atmospheres or corrosive-gas process conditions dominate.
Both route through Tunnels & Transportation, but their architectures differ: longitudinal tunnel jet fans (SDS/SDS(R)), car-park induction fans (PYHL-14A), and ducted exhaust fans (DTF) are selected from different calculations.
Not when collection preservation drives the HVAC requirement. Use Museums & Archives when particulate capture, gaseous pollutant adsorption (V-Type/HT canisters), and preservation stability take priority over occupant comfort alone.
No. Industry pages start from the operating environment and sector risks. Systems & Solutions starts from the engineering discipline (e.g. Airside, Hydronic, Life-Safety). Both routes connect to the same component families.
YONGFAN does not supply the complete chiller plant, central primary AHU casing, precision CRAC unit, or refinery turnkey EPC package.
Facility-level compliance, process validation, pharmaceutical qualification, and cleanroom classification remain project design responsibilities.
Tunnel emergency life-safety modeling, smoke backlayering simulations, and hazardous-area boundary studies must be conducted by certified project consultants.
Always verify component selections against actual airflow, static pressure, chemical concentrations, fluid metallurgy, and market-specific certificates.
Send your project drawings, equipment schedules, or hazardous area parameters — YONGFAN application engineers will help configure the right component packages for your operating duty.
