Product Information

Spiral Diffusers

Spiral Diffusers

Made exclusively for quick and easy mounting on round metal ductwork, Spiral Diffusers provide a clean, low-profile appearance and allows for a more attractive installation.

Document Type	Document Name	Description	File Size
	Brochure - GRD Product Selection Guide	Product Selection Guide for Hart & Cooley's Grilles, Registers and Diffusers.	1.50 MB
	HC GRD Catalog - Light Commercial - Spiral Diffusers	HC GRD Catalog - Light Commercial - Spiral Diffusers	212.19 KB

Document Type	Document Name	Description	File Size

Document Type	Document Name	Description	File Size
	Air Diffusion Patterns	Air Diffusion Patterns	24.27 KB
	Cross Reference Sheet - Light Commercial	Cross Reference Sheet - Light Commercial - Excel format	75.00 KB
	Cross Reference Sheet - Light Commercial	Cross Reference Sheet - Light Commercial	76.00 KB
	Frequently Asked Questions HC Residential GRDs	Frequently Asked Questions - H&C Residential GRDs	11.54 KB
	Grilles, Registers & Diffusers Engineering Data	For a given CFM and chosen register style and location(s), use the chart to select a size that delivers the required CFM at a velocity that is recommended for the particular application or throw requirement.	1.46 MB
	Order Form - H&C Grilles Registers Diffusers - excel version	GRD Order Form	205.00 KB
	Order Form-H&C Grilles Registers Diffusers	GRD Order Form	48.18 KB
	Recommended Noise Criteria	Recommended Noise Criteria	24.27 KB
	SS - Linear Face Diffuser	Engineering Data - pages 144 - 145	84.13 KB
	SV - Single Deflection Diffuser	Engineering Data - page 146	66.90 KB
	SVH - Double Deflection Diffuser	Engineering Data - page 146	66.90 KB
	USV - Universal Single Deflection Diffuser	Engineering Data - page 146	66.91 KB
	USVH - Universal Double Deflection Diffuser	Engineering Data - page 146	66.92 KB
	Velocity Limitations for Various Applications	Velocity Limitations for Various Applications	24.27 KB

Document Type	Document Name	Description	File Size
	Spiral Diffusers - Aluminum - SS	Aluminum Spiral Duct Slot Diffuser SD-9715	92.98 KB
	Spiral Diffusers - Aluminum - USV/USVH	Universal Spiral Duct Diffuser with Single and Double Deflection SD-9720	108.26 KB
	Sprial Diffusers - Aluminum - SV/SVH	Spiral Duct Diffuser with Single and Double Deflection SD-9714	72.06 KB