All products are designed and manufactured for use within forced air systems, providing effective distribution of conditioned air from the air handler to every room of a residence.Metal duct and fittings are constructed from hot-dipped Galvanized steel. All metal products are made true to gauge. Sheet metal duct, pipe, and fittings are designed with industry and regional standards in mind, as well as ACCA and SMACNA recommendations and requirements. Products are hand-crafted to reduce noise and friction and constructed to maximize efficiency by increasing airflow without leaks. The quality of our Galvanized steel allows us to create fittings that are rust-resistant and durable

Southwark DX12060

Hart & Cooley HC1210 Round Butterfly Damper 10"

Hart & Cooley HC1210

Hart & Cooley 1212 Golden Sand Enamel Steel Round Butterfly Damper, 12"

• Removable knob operator for adjustment from closed to fully open
• Damper controls air evenly over entire diffuser
• All steel construction
• 3-hole 0.19" diameter damper mounting holes
• 3-hole 0.111" diameter evenly spaced diffuser mounting holes

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Hart & Cooley HC1212

Hart & Cooley HC3807 Adjustable Round Butterfly Damper 7"

Hart & Cooley HC3807

Hart & Cooley 11 Duct Ring, for use with No 16 Diffuser Damper, 10" Diameter, Steel, Import

Hart & Cooley HC1110