Technically, it might be possible to put two range hoods on one duct, but it’s generally not recommended and can lead to several problems:
Reduced airflow:
Each range hood needs a certain amount of airflow (measured in CFM, cubic feet per minute) to function effectively. Combining them into one duct could restrict airflow and reduce their ability to remove smoke, grease, and odors.
Backdrafting:
With two hoods competing for airflow, there’s a chance one could pull smoke and grease back into the kitchen instead of venting it out.
Increased pressure:
Two hoods working against a single duct could create excessive pressure buildup, potentially damaging the ductwork or the hoods themselves.
Inefficiency:
The overall efficiency of the system would likely be lower. In most cases, a better solution would be to:
Install a single, larger hood:
A wider hood would capture more cooking effluent and accommodate the airflow from both sides.
Use separate ducts:
This ensures optimal performance for each hood.
If you’re considering this option, it’s important to consult with a qualified HVAC professional. They can assess your specific situation, calculate the required CFM, and advise on the best course of action to ensure proper ventilation for your kitchen.
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