Gym and Fitness Studio Title 24 Requirements
A fitness studio is decided by occupant density. Table 120.1-A lists exercise rooms at 10 people per 1,000 square feet, which makes the people and area terms equal at 0.15 cfm per square foot. A studio designed at 25 per 1,000 needs 2.5 times that outdoor air and, for qualifying units, demand control ventilation.
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Density sets the air, and the designer's figure counts
Take a 2,000 square foot studio. At the table's 10 per 1,000 that is 20 people at 15 cfm, 300 cfm, matching the area term of 0.15 times 2,000. The expected occupancy is the designer's figure or the table default, whichever is greater, so a class plan for 50 people means 750 cfm. A density of 25 per 1,000 (or the building code's egress load factor of 40 square feet per person) also makes demand control ventilation mandatory where the unit has an economizer, modulating outdoor air or more than 3,000 cfm. Rooms under 150 square feet or under 10 people are excepted.
A lighting coincidence
The exercise and gymnasium area allowance in Table 140.6-C is 0.50 watts per square foot with no additions. Multilevel control applies to spaces of 100 square feet or more with a connected load greater than 0.5, so a studio lit exactly at its allowance sits at the threshold, and any extra fixtures push it over. Automatic shut-off is required in either case.
Showers change the water heating scope
An altered or replaced water heating system follows Section 140.5(a)2, which means Sections 110.1, 110.3, 120.3 and 140.5(c), but not the solar water heating requirement (Section 141.0(b)2N). Gas systems of 1 MMBtu per hour or more need 90 percent thermal efficiency unless site solar or recovered energy supplies 25 percent of the load. Individual gas heaters of 100,000 Btu per hour or less are left out of that total. Shower rooms are exhausted at 20 or 50 cfm per showerhead and athletic locker rooms at 0.50 cfm per square foot.
Floor air stays separate
Exercise rooms are Class 2 air, which may not be recirculated or transferred to Class 1 spaces such as offices and lobbies. A heated pool adds Section 110.4, and the heater itself falls under commercial water heating.
See gyms and fitness centers, ventilation and lighting controls. A move from retail is a change of use, and our commercial service prepares the NRCC set.
Common Title 24 Questions
- When does a commercial project need Title 24?
- Does an office tenant improvement need Title 24?
- Does a restaurant remodel need Title 24?
- Does a retail tenant improvement need Title 24?
- What plans are needed for a commercial Title 24 report?
- What is an NRCC certificate of compliance?
Frequently Asked Questions
Only if it is designed, or permitted by the egress load factor, at 25 people per 1,000 square feet or more and its unit has an economizer, modulating outdoor air or serves over 3,000 cfm.
No. Section 141.0(b)2N applies Section 140.5(a)2 and (b) to altered systems except the solar water heating requirements.
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