---
title: "Exhaust Fan"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:EXHAUST_FAN"
  data_integrity_hash: "da9374d1914b02fbf6b178f3f2482470"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:EXHAUST_FAN"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/exhaust-fan.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/exhaust-fan"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 kPa static pressure, 0.1-10 m³/s volumetric flow rate, -20°C to 80°C ambient temperature"
    unit: "m³/h"
engineering_limits:
  max_safe_operating_point:
    value: 120
    unit: "°C"
    consequence: "Bearing seizure due to lubricant thermal breakdown at 120°C, impeller fatigue fracture at centrifugal stresses exceeding 150 MPa, motor overload at power draw exceeding 110% rated capacity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Voltage imbalance exceeding 2% between phases"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Three-phase voltage monitoring relay with 1% sensitivity cutoff"
  - node_2:
      trigger: "Particulate accumulation exceeding 500 g/m² on impeller surfaces"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Self-cleaning impeller coating with 30 μm hydrophobic polymer layer"
bom_nodes:
  impeller-blades:
    type: "component"
    urn: "URN:CNFX:ME:IMPELLER_BLADES"
    interface_type: "physical-logic-coupled"
  motor:
    type: "part"
    urn: "URN:CNFX:ME:MOTOR"
    interface_type: "physical-logic-coupled"
  housing-casing:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING_CASING"
    interface_type: "physical-logic-coupled"
  mounting-frame-base:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FRAME_BASE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5801:2017 - INDUSTRIAL FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/exhaust-fan.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "9811c5109194b41fd14d2d178073ef8dc2717f23d18e462142d81312ac378f80"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Exhaust Fan

## 1. Technical Definition
A mechanical ventilation device that extracts contaminated air, fumes, or particulates from industrial processes.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 kPa static pressure, 0.1-10 m³/s volumetric flow rate, -20°C to 80°C ambient temperature**. Failure boundary: **Bearing temperature exceeding 120°C, impeller tip speed exceeding 85 m/s, static pressure differential exceeding 3.0 kPa**, Mechanism: **Bearing seizure due to lubricant thermal breakdown at 120°C, impeller fatigue fracture at centrifugal stresses exceeding 150 MPa, motor overload at power draw exceeding 110% rated capacity**.

### 2.1 Analytical Physics Model
Governed by the **Hansen Solubility Distance (HSP)**:

> **Primary Equation**: $R_a = \sqrt{4\Delta\delta_d^2 + \Delta\delta_p^2 + \Delta\delta_h^2}$  
> **Engineering Impact**: Predicts seal/gasket swelling when exposed to CIP chemicals.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \delta_d | Dispersive | Engineering Constant |
| \delta_p | Polar | Engineering Constant |
| \delta_h | Hydrogen | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Voltage imbalance exceeding 2% between phases | 8 | Motor winding insulation breakdown at 130°C hotspot temperature | Three-phase voltage monitoring relay with 1% sensitivity cutoff |
| Particulate accumulation exceeding 500 g/m² on impeller surfaces | 8 | Dynamic imbalance causing vibration amplitude &gt; 7.1 mm/s RMS | Self-cleaning impeller coating with 30 μm hydrophobic polymer layer |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | m³/h | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Motor](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/motor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Ductwork System**, **Air Filtration Unit**, **Variable Frequency Drive**  
**Downstream Applications**: Pharmaceutical Intermediates, Polymer Resins, Specialty Chemicals  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are best for exhaust fans in corrosive chemical environments?
**A**: Stainless steel (particularly 316 grade) offers superior corrosion resistance for harsh chemical environments. Aluminum and galvanized steel are suitable for less corrosive applications but may require protective coatings.

### Q: How do I select the right exhaust fan capacity for my chemical process?
**A**: Calculate based on air volume (CFM), static pressure, temperature of exhaust gases, and specific contaminants. Consider process emission rates, room size, and required air changes per hour. Consult with an industrial ventilation engineer for hazardous applications.

### Q: Are explosion-proof exhaust fans required for chemical manufacturing?
**A**: Yes, for areas handling flammable vapors, gases, or combustible dusts. ATEX or similar certified explosion-proof motors and non-sparking construction are essential to prevent ignition sources in classified hazardous locations.

## 6. Manufacturing Compliance
- ISO 5801:2017 - INDUSTRIAL FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Exhaust Fan](https://cnfx.com/industry/chemical-manufacturing/product/exhaust-fan)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: EXHAUST_FAN | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b92aa227
