• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

[F] 421.4.1.1 Ventilation Alternative

Building Code 2012 of South Holland > 4 Special Detailed Requirements Based on Use and Occupancy > 421 Hydrogen Cutoff Rooms > 421.4 Design and Construction > 421.4.1 Opening Protectives > 421.4.1.1 Ventilation Alternative
JUMP TO FULL CODE CHAPTER
Where an exhaust system is used in lieu of the interlock system required by Section 421.4.1, exhaust ventilation systems shall operate continuously and shall be designed to operate at a negative pressure in relation to the surrounding area. The average velocity of ventilation at the face of the door opening with the door in the fully open position shall not be less than 60 feet per minute (0.3048 m/s) and not less than 45 feet per minute (0.2287 m/s) at any point in the door opening.

Related Code Sections


421.4.1.1 Special Detailed Requirements Based on Use and Occupancy, Ventilation Alternative
Where an exhaust system is used in lieu of the interlock system required by Section 421.4.1, exhaust ventilation systems shall operate continuously ...
Building Code 2012 of South Holland > 4 Special Detailed Requirements Based on Use and Occupancy > 421 Hydrogen Cutoff Rooms > 421.4 Design and Construction > 421.4.1 Opening Protectives > 421.4.1.1 Ventilation Alternative
909.20.3 Fire Protection Systems, Natural Ventilation Alternative
The provisions of Sections 909.20.3.1 through 909.20.3.3 shall apply to ventilation of smokeproof enclosures by natural means ...
Building Code 2012 of South Holland > 9 Fire Protection Systems > 909 Smoke Control Systems > 909.20 Smokeproof Enclosures > 909.20.3 Natural Ventilation Alternative
909.20.3 Fire Protection and Life Safety Systems, Natural Ventilation Alternative
The provisions of Sections 909.20.3.1 through 909.20.3.3 shall apply to ventilation of smokeproof enclosures by natural means ...
Building Code 2018 of South Holland > 9 Fire Protection and Life Safety Systems > 909 Smoke Control Systems > 909.20 Smokeproof Enclosures > 909.20.3 Natural Ventilation Alternative
909.20.4.2.1 Fire Protection and Life Safety Systems, Engineered Ventilation System
Where a specially engineered system is used, the system shall exhaust a quantity of air equal to not less than 90 air changes per hour from any ...
Building Code 2018 of South Holland > 9 Fire Protection and Life Safety Systems > 909 Smoke Control Systems > 909.20 Smokeproof Enclosures > 909.20.4 Mechanical Ventilation Alternative > 909.20.4.2 Vestibule Ventilation > 909.20.4.2.1 Engineered Ventilation System
909.20.3.3 Fire Protection and Life Safety Systems, Vestibule Ventilation
Each vestibule shall have a minimum net area of 16 square feet (1.5 m 2 ) of opening in a wall facing an outer court, yard or public way ...
Building Code 2018 of South Holland > 9 Fire Protection and Life Safety Systems > 909 Smoke Control Systems > 909.20 Smokeproof Enclosures > 909.20.3 Natural Ventilation Alternative > 909.20.3.3 Vestibule Ventilation
Help Contact Us Privacy Terms
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Compare
Code Compare
Highlight differences between any two building codes.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING