

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The SOUTHWARK METAL 51F6148SD is a 601-series register boot designed to transition from rectangular duct to a floor or ceiling register opening. It connects the branch duct run to the supply air outlet, directing conditioned air into the living or working space. This boot measures 14 x 6 x 8 inches and fits into standard residential and light commercial forced-air duct systems. HVAC installers and sheet metal contractors typically specify this style of fitting when roughing in new construction or replacing damaged boots during retrofit work.
The 51F6148SD is suited for residential forced-air heating and cooling applications where a straight or offset transition is needed between a rectangular duct and a floor, sidewall, or ceiling register. It is commonly installed during new construction framing stages or during duct modification and repair work in existing systems. The 601-series profile is a widely recognized configuration in residential HVAC duct fabrication.
Designed as an OEM-style replacement or new-construction fitting for residential and light commercial forced-air supply duct systems accepting a 14 x 6 duct inlet and an 8-inch register opening dimension.
Installation is performed by licensed HVAC technicians or qualified sheet metal contractors. Power down the air handler or furnace and ensure the system is de-energized before beginning duct modification work. Secure the boot to the branch duct using sheet metal screws and seal all joints with UL 181-rated mastic or approved foil tape to meet energy code requirements. Local mechanical codes and SMACNA duct construction standards should be followed throughout the installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!