Pemko 345NB 36" Door Bottom Sw...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$26.14
$21.66
Pemko 345NB 36"; Door Bottom Sweep with Raindrip and Nylon Brush Insert

Pemko 345NB 36" Door Bottom Sweep with Raindrip and Nylon Brush Insert

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Model: 345DNB-48
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$26.14
$21.66
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Pemko 345NB 36"; Door Bottom Sweep with Raindrip and Nylon Brush Insert

Professional Weather Sealing Solution with Rain Deflection

The Pemko 345NB Door Bottom Sweep combines effective weather sealing with rain deflection in a durable 36"; aluminum assembly. Featuring a 7/16"; high nylon brush insert and surface-mounted raindrip design, this door bottom provides comprehensive protection against air, water, and debris infiltration. The 9/16"; width aluminum retainer with slotted mounting holes ensures secure installation and easy field adjustment for optimal sealing performance.

Professional Features & Benefits

  • Standard Door Width Compatibility: 36"; pre-cut length fits most commercial and residential door applications for immediate installation.
  • Integrated Rain Deflection: Surface-mounted raindrip design directs water away from the door bottom to prevent moisture infiltration and threshold damage.
  • High-Performance Brush Insert: 7/16"; high nylon brush with densely compressed filaments provides effective sealing while maintaining flexibility for smooth door operation.
  • Extreme Temperature Performance: Brush remains flexible down to -40�F and withstands temperatures above 400�F for reliable operation in demanding conditions.
  • Durable Aluminum Construction: 9/16"; width aluminum retainer provides corrosion resistance and long-term durability for commercial applications.
  • Adjustable Installation System: Slotted mounting holes allow for precise positioning and easy field adjustment to achieve optimal sealing contact.
  • Multi-Certification Compliance: GREENGUARD Gold Certified, UL 1784 air leakage tested, UL 10C fire rated, and ANSI/BHMA A156.22 certified for comprehensive code compliance.
  • Natural Pest Deterrent: Brush design naturally repels rodents and spiders, with compatibility for household pest repellent application for enhanced protection.

Technical Specifications

  • ANSI/BHMA: BHMA Certified; Fire Rated - UL10C; GREENGUARD Gold Certified; Fire Rated - UL10B
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • For Use With: Architectural Doors
  • Insert Type: Nylon Brush Insert
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 9/16", H: 1-15/16 ";
  • Product Function: Automatic Door Bottom
  • Product Group: Door Trim and Accessories
  • Product Length: 36";
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Product Substrate: Aluminum
  • Product Type: Automatic Door Bottoms
  • Series: 345 Series
  • Subcategory: Door Bottoms & Door Shoes

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Pemko Quality?

Pemko door bottom sweeps deliver professional-grade weather sealing with high-quality aluminum construction and temperature-tested nylon brush inserts rated for extreme conditions from -40�F to above 400�F. Multiple certifications including GREENGUARD Gold, UL fire ratings, and ANSI/BHMA compliance ensure reliable performance in demanding commercial applications where effective environmental control and code compliance are essential.

Product Specs

Product Function:
Automatic Door Bottom
Insert Type:
Nylon Brush Insert
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Door Bottoms & Door Shoes
ANSI/BHMA:
BHMA Certified; Fire Rated - UL10C; GREENGUARD Gold Certified; Fire Rated - UL10B
Commercial/Residential:
Commercial
Series:
345 Series
Product Length:
36"
For Use With:
Architectural Doors
Product Dimension:
W: 9/16", H: 1-15/16 "
Product Substrate:
Aluminum
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Pemko 345DNB-48 – Frequently Asked Questions

1) Will the Pemko 345NB door bottom sweep fit a 36 inch door, or do I need to cut it?
The 345NB comes pre-cut in three lengths: 36, 42, and 48 inches. Order the length that matches or slightly exceeds your door width; the aluminum retainer can be cut down to the exact leaf width on site. For a standard 36 inch commercial leaf, the 36 inch piece is the direct fit.
2) Can I use a Pemko 345NB sweep on a fire rated door?
Yes. The 345NB is UL 10C and UL 10B fire rated and BHMA certified, so it can go on a labeled opening. It is also GREENGUARD Gold certified, which is what institutional specs on schools and healthcare projects usually ask for on low emitting materials.
3) Is the Pemko 345NB an automatic door bottom that drops when the door closes?
No, and this is worth getting straight before you order. Despite being grouped with automatic door bottoms, the 345NB is a surface applied brush sweep: the retainer screws to the face of the door and the 7/16 inch nylon brush stays in constant contact with the floor. There is no plunger or cam mechanism that raises and lowers the seal as the door swings. If you need a seal that lifts clear of the floor when the door opens, you want a mortised or surface mounted automatic door bottom with a drop bar, not a brush sweep.
4) Brush sweep or vinyl bulb sweep at the bottom of an exterior door?
A nylon brush like the 345NB is the choice when the floor is uneven, when the door drags over carpet or a rough threshold, or when the sweep has to survive heat and cold. The brush stays flexible down to -40F and holds above 400F, and it does not drag or squeal the way a solid bulb does. A vinyl or neoprene bulb makes a tighter seal on a flat, smooth threshold and is the better pick where you need a positive weather seal against driving water at floor level. The 345NB splits the difference by adding a raindrip above the brush to throw water off the door face before it reaches the sill.
5) What does the raindrip on the Pemko 345NB actually do, and do I still need a separate drip cap?
The raindrip is a projecting lip built into the sweep retainer that throws water running down the door face outward, away from the door bottom and threshold. It handles water at the bottom of the door. It does not replace a head drip cap over the top of the opening, which is a separate part for shedding water off the top of the frame. On an exterior opening you would typically use both.
6) Can I adjust a Pemko 345NB sweep after it is installed if it does not seal evenly?
Yes. The mounting holes in the aluminum retainer are slotted, so you can loosen the screws and slide the sweep up or down to set brush contact, then retighten. That matters on older openings where the floor is out of level across the swing, since you can set the height at the point of tightest contact and still get sweep coverage at the far end.
7) Is the Pemko 345 sweep rated for smoke or air leakage on a labeled opening?
It is UL 1784 air leakage tested and carries UL 10C and UL 10B fire ratings along with BHMA certification. That combination is what a facility spec on a rated corridor or stair door typically calls for at the door bottom. It is catalogued for commercial architectural door use.
8) Will the Pemko 345NB work on a pair of doors, and how many do I need?
Order one per leaf. A brush sweep seals the gap between the door bottom and the floor and does nothing at the meeting stile, so a pair of 36 inch leaves takes two 36 inch sweeps. The astragal between the leaves is a separate part.
9) What finishes does the Pemko 345 Series door sweep come in for matching existing doors?
Two: mill finish aluminum and dark bronze anodized aluminum, both available in all three lengths (36, 42, and 48 inches). Mill finish is the standard silver aluminum that blends with aluminum storefront and hollow metal painted light colors; dark bronze anodized matches bronze storefront and dark painted doors. If you are standardizing a building, both finishes carry the same brush and raindrip profile, so mixed finishes across the fleet still look consistent in section.
10) Will a Pemko 345NB brush sweep keep rodents and insects out from under a warehouse door?
The densely compressed nylon filaments close off the gap under the door and naturally deter rodents and spiders, and the brush accepts household pest repellent if you want to treat it. It is a common pick for industrial and warehouse doors for that reason. Understand the limit: a brush conforms to an uneven slab rather than sealing airtight against it, so it is a barrier, not a gasket.
11) Does the Pemko 345NB come with fasteners, or do I need to supply screws?
The 345NB ships as the aluminum retainer with the nylon brush insert already installed, with slotted mounting holes pre-punched in the retainer. Plan on supplying fasteners suited to your door substrate, since a hollow metal leaf, an aluminum storefront stile, and a solid core wood door each take a different screw.
How fast can I get the Pemko 345DNB-48 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko 345DNB-48 come with a warranty?
Absolutely. The Pemko 345DNB-48 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pemko 345DNB-48?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pemko 345DNB-48 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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