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Roof Ventilators

Roof ventilators can help extend the life of a commercial or industrial building by providing proper airflow. Regulate heat and moisture with an attic fan. Ventilate hot air with a belt drive exhaust fan. Use a roof curb with the fans when you need to create a strong leak-proof seal. Choose the right option from our wide selection of roof ventilators to fit your unique needs.

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Roof Ventilators Q&A

HVAC and Refrigeration
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Roof Ventilators
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Customer has Dooms and several have been damaged or blowen off. Need to find replacement, see photos. Please provide photo & price on replacement Doom.
Gender: Male
Field of Industry:: Roofing
Product used for:: Replacement
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2 years, 1 month ago
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Harvey, LA, USA
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Answer: 
We would not be able to macth a replacement dome without knowing who they are manufactured by. Each manufacture will have thier own specific mounting brackets. We would have a better chance to match a complete replacement gravity vent. We would only need to know the curb base dimension.

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The source for the answers given by Grainger in Ask and Answer are based on the information provided with the question, which may not be complete or may not apply to other situations, and based on product literature and informational materials, the content of which is provided by Grainger’s product suppliers. Grainger disclaims liability for any information it provides in Ask and Answer which later may be alleged or determined by a court of law to be inaccurate or incorrect. The answers given by Grainger in Ask and Answer are not intended to replace or supplement any professional, engineering or other consultation services available to its product users. Always read, understand, and follow the product information and instructions provided by the manufacturer.
Gender: Male
Age: 35 to 44
2 years, 1 month ago
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Lincolnshire, IL, USA
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Answer: 
There are several factors that will determine if your application will work properly. The ducting needs to be sized properly to support the air flow. The cfm of the single exhaust ventilator must be able to support the capacity of both hoods as well as the pressure of the duct. The duct will need to be ballanced to make sure that both hoods get equal air flow, if the duct to one hood is longer than the second duct from the tee it will draw less air flow. You may want to contact a contractor for sizing. You can also call our HVAC tech support team at 800-4724643.

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