NGP 229SSS 36 Stainless Steel ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$236.00
NGP 229SSS 36 Stainless Steel Automatic Door Bottom with Silicone Seal - 36" BHMA Grade 1 Certified

NGP 229SSS 36 Stainless Steel Automatic Door Bottom with Silicone Seal - 36" BHMA Grade 1 Certified

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Model: 229SSS 36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$236.00
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NGP Stainless Steel Automatic Door Bottom with Silicone Seal - 36" BHMA Grade 1 Certified

Professional Automatic Door Sealing Solution

The NGP 229SSS automatic door bottom delivers professional-grade sealing performance with BHMA Grade 1 certification to ANSI/BHMA A156.22 standards. This 36" stainless steel door bottom features siloxane closed cell sponge sealing material rated for 1,000,000 cycles, providing exceptional durability for high-traffic commercial applications. The Type 304 stainless steel construction with brushed #4 finish (US32D, 630) ensures long-lasting performance in demanding environments.

Professional Features & Benefits

  • 36" Length: Standard 36" length suitable for most commercial door applications with field cutting capability up to 4" for precise fit.
  • BHMA Grade 1 Durability: Certified to 1,000,000 cycle test per ANSI/BHMA A156.22 for exceptional longevity in high-traffic installations.
  • Extreme Temperature Performance: Operating range from -100 F to 500 F with BHMA certification for heat and cold performance tests, maintaining flexibility at temperature extremes.
  • Type 304 Stainless Steel Construction: Corrosion-resistant stainless steel housing with brushed #4 finish (US32D, 630) provides professional appearance and durability.
  • Advanced Siloxane Sealing: Closed cell sponge siloxane material offers excellent flexibility, memory, flame resistance, and moisture resistance with superior ozone and UV resistance.
  • Fire Suppression System Compatible: Recommended for areas using FM200 or Halon fire suppression systems due to material compatibility and performance characteristics.
  • Flexible Installation Options: Mounts on push side of door with 7/8" maximum drop, includes standard end caps, and accommodates both threshold and carpet applications.
  • Professional Sizing Options: Available in lengths from 11" minimum to 60" maximum with field cutting capability for 36" and longer units to avoid field sizing issues.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Product Type: Automatic Door Bottoms
  • Subcategory: Gaskets & Weatherstripping

Professional Applications

  • Commercial Office Buildings
  • Healthcare Facilities
  • Educational Institutions
  • Fire-Rated Door Assemblies
  • Areas with FM200 or Halon Fire Suppression Systems
  • High-Traffic Commercial Entrances
  • Temperature-Controlled Environments

Why Choose NGP Quality?

NGP automatic door bottoms deliver professional-grade reliability with Type 304 stainless steel construction and BHMA Grade 1 certification for 1,000,000 cycles. The advanced siloxane sealing material maintains performance from -100 F to 500 F while providing excellent resistance to ozone, UV, and aging. Engineered for demanding commercial applications where dependable sealing performance and long-term durability are essential.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

NGP 229SSS 36 – Frequently Asked Questions

1) Will the NGP 229SSS automatic door bottom fit a 36 inch door, and can I cut it down if my door is narrower?
The 229SSS is a 36 inch unit and can be field cut up to 4 inches, so it covers openings from about 32 inches up to 36. NGP builds the 229 in lengths from 11 inches minimum to 60 inches maximum, and units 36 inches and longer are the ones intended to be field cut rather than special ordered. Cut past 4 inches and you are into the wrong length unit.
2) How much gap under the door will the NGP 229SSS automatic door bottom close?
Maximum drop on the 229SSS is 7/8 inch, which is the undercut it will seal. Measure your actual gap at the widest point of the sweep of the door, not at the hinge stile, since the drop has to reach the floor across the whole width. It works over a threshold or down onto carpet.
3) Is the NGP 229SSS door bottom rated for high traffic openings?
BHMA Grade 1, certified to a 1,000,000 cycle test per ANSI/BHMA A156.22. That is the top durability tier in that standard, and it is why this one holds up on a main corridor or entrance door that cycles all day, where a lighter automatic bottom loses its seal.
4) What is the closest equivalent to the NGP 229SSS 36 automatic door bottom from another manufacturer?
The Pemko SA3-36 is the direct counterpart. Both are 36 inch automatic door bottoms, so both drop a seal to the sill when the door closes and lift it clear when the door swings, rather than dragging a fixed strip across the floor. The 229SSS uses a siloxane closed cell sponge seal in a Type 304 stainless housing with a brushed #4 finish (US32D, 630), rated -100 F to 500 F and BHMA Grade 1 to ANSI/BHMA A156.22 for 1,000,000 cycles. The Pemko SA3-36 is a surface mount unit carrying a GREENGUARD Gold certified Eco-V insert. If the seal material is being chosen for a LEED or indoor air quality submittal, the Eco-V insert is the one with the certification attached; if the opening sees heat, cold, or an FM200 or Halon suppression system, the siloxane seal on the 229SSS is the material specified for it.
5) Can a door bottom sweep be used instead of the NGP 229SSS automatic door bottom?
They are not interchangeable, and the difference shows up the first time the door swings. The NGP 229SSS 36 is an automatic door bottom: the seal retracts as the door opens, so there is no contact with the floor covering during normal operation, and it mounts on the push side with a 7/8 inch maximum drop over either a threshold or carpet. A sweep such as the Pemko 345 Series 36 inch door bottom sweep is a fixed seal that rides against the floor or threshold at all times. On a carpeted opening, or anywhere the finished floor cannot take continuous contact, the automatic unit is the one that works. Where the floor is hard and level and the seal can simply stay down, a 345 Series sweep does the same sealing job with no moving mechanism to adjust.
6) Automatic door bottom or plain door sweep, which do I need?
An automatic door bottom like the NGP 229SSS drops a seal only when the door closes and lifts it clear when the door opens, so nothing drags on carpet or a finished floor and the seal is not wearing every cycle. A brush or vinyl sweep such as the Pemko 345 Series 36 inch door bottom sweep with PemkoPrene insert stays in contact all the time, costs less to install, and is the right call on an exterior door where you also want the rain drip the 345 carries. Interior smoke and sound sealing, or any opening over carpet, is where the automatic bottom earns its place.
7) Will an NGP 229SSS automatic door bottom hold up in a walk-in cooler or a hot mechanical room?
The siloxane closed cell sponge seal is rated from -100 F to 500 F and carries BHMA certification for both the heat and cold performance tests, so it stays flexible at either extreme instead of going stiff in the cold or taking a set in the heat. Freezer vestibules, boiler and mechanical rooms, and temperature controlled storage are all inside that band.
8) Can I use this door bottom in a room protected by FM200 or Halon?
Yes, NGP recommends the 229SSS specifically for spaces using FM200 or Halon suppression, on material compatibility grounds. Those rooms depend on holding agent concentration, which means the undercut has to seal when the door is shut, and the siloxane sponge is the material NGP calls out for that duty. Data centers and equipment rooms are the usual application.
9) Can I put an NGP automatic door bottom on a fire rated door?
NGP lists fire rated door assemblies among the applications for the 229SSS, and the unit is BHMA Grade 1 certified to ANSI/BHMA A156.22. Surface mounting on the push side means nothing is being cut into the door itself, which is the part that matters on a labeled assembly. Confirm the seal is accepted under the door manufacturer's listing for your specific label before it goes on.
10) What is the difference between a surface mount automatic door bottom and the NGP 229SSS?
Mounting method is the deciding factor when the door is already hung. The Pemko SA Series SA3-36 is a surface mount automatic door bottom, meaning it fastens to the face of the door with no mortise pocket required. The NGP 229SSS 36 also mounts to the push side of the door and drops up to 7/8 inch, and its housing is Type 304 stainless steel with a brushed #4 finish, so the exposed face reads as US32D (630) against stainless push plates and other 630 trim on the same opening. For a retrofit on an existing wood or hollow metal door, either surface applied unit avoids routing the door bottom; the choice comes down to whether the opening needs the stainless housing and siloxane seal or the Eco-V insert Pemko puts in the SA Series.
11) What finish is the NGP 229SSS door bottom and will it match my other stainless hardware?
Type 304 stainless steel with a brushed #4 finish, which is US32D / 630. That is the same designation as satin stainless levers, hinges, and push plates, so it lines up with the standard commercial stainless package on the rest of the opening. Type 304 also means it takes wash downs and coastal air without pitting the way a painted aluminum housing will.
12) Do I need to order end caps separately for the NGP 229SSS?
Standard end caps come with the unit, so the 36 inch 229SSS arrives ready to mount on the push side. Fasteners for your door face and the actual cut to length are the installer's side of the job.
13) How many finish options does the NGP 229SSS 36 inch come in?
One: stainless steel, the Type 304 brushed #4 housing. If you are standardizing a building on this door bottom, every opening gets the same satin stainless look, so there is nothing to specify beyond the length.
How fast can I get the NGP 229SSS 36 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 NGP 229SSS 36 come with a warranty?
Absolutely. The NGP 229SSS 36 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 NGP 229SSS 36?
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 NGP 229SSS 36 from ZenSupply?
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