HVACQuestions
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Is there a code requirement in IMC for using propane forklifts in warehouses as opposed to lithium-ion battery forklifts?
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Required air change rates for propane forklifts in warehouse?
- Thread starter HVACQuestions
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HVACQuestions
Registered User
related, has anyone had to deal with a warehouse where idling cars are inside the space? i assume it's then a parking garage at 0.75 cfm/sf...
mark handler
SAWHORSE
Air change Rate Ventilation ASHRAE 62 Table
...provide ventilation for a warehouse. Per ASHRAE, you need to provide min. 0.06 cfm per sq ft fresh air. But there are some recommendations to provide 4-8 times air changes per hour. The difference between ASHRAE and recommendation is significant.
...provide ventilation for a warehouse. Per ASHRAE, you need to provide min. 0.06 cfm per sq ft fresh air. But there are some recommendations to provide 4-8 times air changes per hour. The difference between ASHRAE and recommendation is significant.
Yankee Chronicler
Registered User
Keep in mind the difference between fresh outdoor air, and air circulation. You can have a completely closed system that recirculates 100% of the air in a space 4 to 8 times in an hour. To meet the intent of the code for ventilation, though, you need to introduce at least a percentage of fresh outdoor air into the circulation system. The code establishes 20% as the minimum percentage for most applications, so to arrive at the circulation you take the number of cfm of outdoor air required, then multiply it by five to get the total circulation needed for the space.
With a balanced system, obviously if you introduce 20% fresh air at the air handling unit, the AHU also has to exhaust an equivalent volume from the return stream.
Mech
Registered User
Do you have access to The Industrial Ventilation Manual published by the American Conference of Governmental Industrial Hygienists? I was on a project several years ago and the manual required 5,000 cfm for a propane forklift. You can find an older copy at archive.org https://archive.org/details/gov.law.acgih.manual.1998/mode/2up