Supply & Return Register Boots

Get clean transitions from duct to grille with durable Supply & Return Register Boots. Whether swapping a supply boot or repairing a return air box, these budget-friendly components help seal leaks and improve airflow during installs and remodels.

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Supply & Return Register Boots

These sheet-metal register boots connect your ductwork to grilles at ceilings, walls, or floors, creating a smooth transition that supports air delivery and return. Choose from Supply Boot and Return Air Box Register Boot styles to match your opening, duct size, and orientation. With options priced from $14 to $44, they’re a cost-effective way to upgrade or replace worn parts without compromising performance.

Perfect for DIY-capable homeowners, licensed contractors, property managers, and light commercial work, our boots are compatible with rigid or flexible duct when paired with the appropriate collar and fasteners. Use them to adapt trunk lines to grille openings, facilitate airflow transitions at penetrations, or replace damaged boots during renovations for a cleaner, tighter fit.

Available in popular face sizes and depths, these components often include flanged edges for secure anchoring and sealing. Focus on selecting the correct rough opening, duct connection size, and configuration to minimize restriction and leakage. For remodels, measuring the existing opening and verifying clearance behind the surface ensures a precise swap.

Specs note: register boots do not carry SEER2, HSPF2, BTU/tonnage, or refrigerant ratings. Key considerations are dimensions, collar size/shape, orientation (ceiling/wall), and material. Look for galvanized steel construction and pair with UL-listed sealants for best results.

Top Brands for Supply & Return Register Boots

Count on Crown and Metal Shop for consistent, job-ready metal boots. Both brands deliver straightforward, durable solutions suited to residential installs and light commercial applications.

Frequently Asked Questions

  • What size supply or return register boot do I need for my grille opening?

    Match the boot’s face size to the rough opening and the collar to your duct size. Measure width × height of the opening behind the grille and confirm the duct connection.

  • Are these boots compatible with both rigid and flexible duct?

    Yes. Use the proper collar or take-off, secure with a clamp or screws, and seal with UL-181 mastic or foil tape for an airtight fit.

  • How do I measure for a replacement return air box register boot?

    Remove the grille, measure the rough opening and available depth, confirm the duct connection size and location, and note any flange requirements.

  • What materials and gauges are used in Crown vs. Metal Shop boots?

    Both brands use galvanized steel for durability. Gauge and features vary by model; choose based on size, configuration, and job needs.

  • Can these register boots be installed by a DIYer or should a pro handle it?

    Many DIYers can install with basic tools, but follow local codes. Hire a pro if relocating ducts, cutting new openings, or addressing airflow design.

  • Do supply and return boots come with take-offs or require separate collars?

    Some models include an integral collar; others require a separate starting collar or take-off. Check the product style before ordering.

  • Are these boots suitable for light commercial applications?

    Yes, they’re commonly used in light commercial projects. Verify sizing, gauge, and code requirements for your application.

  • What sealant or tape should be used to air-seal register boots?

    Use UL-181 rated mastic or UL-181 foil tape on seams and joints. Avoid cloth duct tape. Add a gasket or caulk at the flange-to-surface joint.

  • Do these boots include the grille or damper?

    Typically no. Boots are the transition piece; order grilles, registers, and dampers separately as needed.

  • What tools are typically needed for installation?

    Common tools include a tape measure, snips, drill/driver, screws, clamp or zip tie, and UL-181 mastic or foil tape. Safety gear is recommended.

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