• 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 General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors 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
Suggested code sections
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

701.7 Combination Indoor and Outdoor Combustion Air

California Mechanical Code 2019 > 7 Combustion Air > 701.0 General > 701.7 Combination Indoor and Outdoor Combustion Air
JUMP TO FULL CODE CHAPTER
The use of a combination of indoor and outdoor combustion air shall be in accordance with Section 701.7.1 through Section 701.7.3. [NFPA 54:9.3.4] (see Appendix F for example calculations)

701.7.1 Indoor Openings

Where used, openings connecting the interior spaces shall be in accordance with Section 701.5. [NFPA 54:9.3.4(1)]

701.7.2 Outdoor Openings

Outdoor openings shall be located in accordance with Section 701.6. [NFPA 54: 9.3.4(2)]

701.7.3 Outdoor Opening(s) Size

The outdoor opening(s) size shall be calculated in accordance with the following:
  1. The ratio of interior spaces shall be the available volume of all communicating spaces divided by the required volume.
  2. The outdoor size reduction factor shall be one minus the ratio of interior spaces.
  3. The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with Section 701.6, multiplied by the reduction factor. The minimum dimension of air openings shall not be less than 3 inches (76 mm). [NFPA 54:9.3.4(3)]

Related Code Sections


701.7 Combustion Air, Combination Indoor and Outdoor Combustion Air
The use of a combination of indoor and outdoor combustion air shall be in accordance with Section 701.7.1 through Section 701.7.3. [NFPA 54:9.3.4 ...
California Mechanical Code 2019 > 7 Combustion Air > 701.0 General > 701.7 Combination Indoor and Outdoor Combustion Air
701.7 Combustion Air, Combination Indoor and Outdoor Combustion Air
The use of a combination of indoor and outdoor combustion air shall be in accordance with Section 701.7.1 through Section 701.7.3. (See Appendix F ...
California Mechanical Code 2016 > 7 Combustion Air > 701.0 General > 701.7 Combination Indoor and Outdoor Combustion Air
506.5 Water Heaters, Combination Indoor and Outdoor Combustion Air
The use of a combination of indoor and outdoor combustion air shall be in accordance with Section 506.5.1 through Section 506.5.3 (see calculation ...
California Plumbing Code 2016 > 5 Water Heaters > 506.0 Air for Combustion and Ventilation > 506.5 Combination Indoor and Outdoor Combustion Air
506.5 Water Heaters, Combination Indoor and Outdoor Combustion Air
The use of a combination of indoor and outdoor combustion air shall be in accordance with Section 506.5.1 through Section 506.5.3. [NFPA 54:9.3.4 ...
California Plumbing Code 2019 > 5 Water Heaters > 506.0 Air for Combustion and Ventilation > 506.5 Combination Indoor and Outdoor Combustion Air
J101.2 Combination of Indoor and Outdoor Combustion and Ventilation Opening Design, Example of Combination Indoor and Outdoor Combustion Air Opening
Determine the required combination of indoor and outdoor combustion air opening sizes for the following appliance installation example. Example ...
California Plumbing Code 2019 > J Combination of Indoor and Outdoor Combustion and Ventilation Opening Design > J101.0 General > J101.2 Example of Combination Indoor and Outdoor Combustion Air Opening
Help Contact Us Privacy Terms
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Compare
Code Compare
Highlight differences between any two building codes.
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
Access to UL product and system certification information.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
Join the waitlist
We are looking to gauge the level of interest in linking UL product and system certification information alongside related code sections.

Let us know your email and we’ll ping you once it’s ready! Learn more.

Thank you for your interest!

If you’re open to it, we would love to jump on the phone to make sure we’re building this in the best way possible for your workflow. Any insight or advice would be greatly appreciated. We’ve sent you an email with a calendar link to book at time with us.


Cancel
Get Early Access
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE