Buy the Greenheck GRSF Gravity Ventilator | Built in Roof Flange

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Shipping Type	Order By
Standard Ground Small Parcel FREE - On orders over $25 View Transit Map	7:00 PM CST
Next Day Air (Calculated at checkout)	3:00 PM CST
Standard Ground Freight FREE - On orders over $25	1:00 PM CST

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Volume (CFM)

Static Pressure (in. wg)

Elevation (ft)

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SKU	BASE/PANEL LENGTH x WIDTH	THROAT AREA	INTAKE AREA	PRICE	LEAD TIME
GRSF-12-QD Model: GRSF Model / Size: GRSF-12	22 x 22 in	0.82 ft虏	2.52 ft虏	$264.13	In stock 5 on Hand	Add to Compare List
GRSF-8-QD Model: GRSF Model / Size: GRSF-8	19 x 19 in	0.37 ft虏	1.3 ft虏	$221.27	In stock 1 on Hand	Add to Compare List
GRSF-10-QD Model: GRSF Model / Size: GRSF-10	19 x 19 in	0.57 ft虏	1.72 ft虏	$245.19	25 Days Lead Time	Add to Compare List

GRSF-12-QD

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-12-QD

$264.13

For natural gravity or positive pressure systems, model GRSF offers excellent performance and durability for intake or relief applications. Featuring an exceptional low silhouette design and rugged construction this model is both efficient and economical.

All aluminum exterior for corrosion-resistant construction
Integral birdscreen to prevent entry of birds and small objects
22 x 22 inch base with built-in flashing flange and prepunched mounting holes for quick and easy installations without a roof curb

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GRSF-8-QD

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-8-QD

$221.27

All aluminum exterior for corrosion-resistant construction
Integral birdscreen to prevent entry of birds and small objects
19 x 19 inch base with built-in flashing flange and prepunched mounting holes for quick and easy installations without a roof curb

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GRSF-10-QD

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-10-QD

$245.19

All aluminum exterior for corrosion-resistant construction
Integral birdscreen to prevent entry of birds and small objects
19 x 19 inch base with built-in flashing flange and prepunched mounting holes for quick and easy installations without a roof curb

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Shop Greenheck GRSF

Model GRSF is an aluminum ventilator designed to be used as an intake or relief unit on natural gravity or negative pressure systems. The GRS has a flashing flange for roof attachment.

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Performance Filter

Calculate Air Exchange (CFM)

Enter information into the fields below to calculate the required airflow per fan.

Calculate Static Pressure (SP)

The pressure generated by fans in ductwork is typically very small. An accurate measurement of static presure is critical to proper fan selection however. Static pressure in fan systems is typically less than 2" SP, or 0.072 Psi.

Static Pressure Guidelines

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-12-QD

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-8-QD

Spun Aluminum Gravity Ventilator with Flashing Flange, Product # GRSF-10-QD

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