Ohio has adopted the following in 2024:
2024 Ohio Mechanical Code
https://codes.iccsafe.org/content/OHMC2024P1
2021 International Fuel Gas Code https://codes.iccsafe.org/content/IFGC2021P2
2021 International Energy Conservation Code
https://codes.iccsafe.org/content/IECC2021P2
Ohio has incorporated 2024 IMC Chapter 11 in its entirety
to address refrigerant code requirements.
Modifications for Ohio are in Chapter 13 of the Ohio Building Code.
https://codes.iccsafe.org/content/OHBC2024P1/chapter-13-energy-efficiency
2024 Ohio Existing Building Code
https://codes.iccsafe.org/content/OHEBC2024P1
Ohio Design Professionals and Code Analysts (ODPCA) funds a reference library at the main branch of the Columbus Metropolitan Library that contains Referenced Standards available to anyone to request by phone and receive any one page via email. The CML Main Library phone is 614-645-2275. http://www.columbuslibrary.org/
The direct link to TABLE 403.3.1.1 MINIMUM VENTILATION RATES in the 2024 OMC online codebook https://codes.iccsafe.org/content/OHMC2024P1/chapter-4-ventilation#OHMC2024P1_Ch04_Sec403.3.1
Robert J. Schutz, P.E. rjschutz@ohiocertificate.com
For information on inspections and code decisions contact the Board of Building Standards at (614) 644-2613
Board of Building Standards website
Heating Degree Days Reference
https://www.eia.gov/energyexplained/units-and-calculators/degree-days.php

Distance to combustible materials. 5/8 Gypsum board is now allowed to achieve a space to combustibles. Fire Rated C board is 1/2″ may also be used. See National Gypsum Association resources.
U.S. EPA Refrigerant sales restriction
School Ventilation: A Vital Tool to Reduce COVID-19 Spread white paper (46 page PDF)
https://www.centerforhealthsecurity.org/our-work/publications/school-ventilation
FDA guidance on UV Lights and Lamps: Ultraviolet-C Radiation, Disinfection, and Coronavirus
Air Diffusion Council
1901 N. Roselle Rd. Suite 800, Schaumburg, Illinois 60195
Phone:847-706-6750
Fax:847-706-6751
URL:http://www.flexibleduct.org
Email:infoflexibleduct.org