NGP 225 Mill Aluminum Mortise ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$94.35
$80.96
NGP NGP 225 Mill Aluminum Mortise Automatic Door Bottom NGP-225

NGP 225 Mill Aluminum Mortise Automatic Door Bottom with BHMA Grade 1 Certification

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Model: 225N 34

In Stock (leaves warehouse same day if ordered before 3pm ET)

$94.35
$80.96
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NGP 225 Mill Aluminum Mortise Automatic Door Bottom with BHMA Grade 1 Certification

Professional Automatic Door Sealing Solution

The NGP 225 Mill Aluminum Mortise Automatic Door Bottom delivers professional-grade door sealing performance with BHMA Grade 1 certification and 1,000,000 cycle durability rating. Constructed from aluminum alloy 6063 with T5 temper and featuring a synthetic rubber polymer blend of PVC, Nitrile rubber (NBR), and Chloroprene closed cell advanced elastomeric foam. Available in lengths from 11" net to 60" with mortise requirements of 3/4" x 1-15/16" and maximum 7/8" drop capability.

Professional Features & Benefits

  • BHMA Grade 1 Certification: Certified for ANSI/BHMA A156.22 with 1,000,000 cycle test rating and performance tests for heat and cold applications.
  • Heavy-Duty Construction: Aluminum alloy 6063 with T5 temper provides exceptional durability and corrosion resistance for commercial applications.
  • Advanced Sealing Materials: Synthetic rubber polymer blend of PVC, Nitrile rubber (NBR), and Chloroprene closed cell elastomeric foam delivers superior sealing performance.
  • Wide Temperature Range: Operates effectively from -20 F to 200 F with excellent resistance to ozone, sunlight, and aging.
  • Flexible Length Options: Available from 11" net to 60" in length with field cutting capability for 36" and longer units (up to 4" reduction).
  • Precise Mortise Dimensions: Requires 3/4" x 1-15/16" mortise with 7/8" maximum drop for reliable automatic operation.
  • Flame and Moisture Resistant: Advanced elastomeric materials provide flame resistance and moisture protection for demanding environments.
  • Lead-Lined Option: Optional 1/16" thick lead insert available for specialized acoustic or radiation shielding applications.

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

Why Choose NGP Quality?

NGP automatic door bottoms deliver professional-grade reliability with aluminum alloy 6063 construction and BHMA Grade 1 certification rated for 1,000,000 cycles. Advanced synthetic rubber polymer blend materials provide superior sealing performance with temperature resistance from -20 F to 200 F. Engineered for demanding commercial applications where dependable weathersealing and acoustic performance 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 225N 34 – Frequently Asked Questions

1) How big a gap under the door will the NGP 225 seal?
Maximum drop is 7/8 inch, so the seal will close an undercut up to that. If your gap runs bigger than 7/8 inch after the floor finish goes in, the 225 will not make contact and you need a different approach at the threshold.
2) Can I cut an NGP 225 automatic door bottom down to fit my door?
Units 36 inches and longer can be field cut, up to 4 inches off. Shorter units are not field cuttable, so order those to the opening. Stock lengths run from 11 inch net up to 60 inches, which covers a 36 inch leaf with room to trim.
3) What is the difference between the NGP 225 automatic door bottom and the Pemko SA Series automatic door bottom?
Both are automatic door bottoms, but they mount differently. The NGP 225 is a mortise unit that drops into a 3/4 inch by 1-15/16 inch pocket routed into the door bottom, with a 7/8 inch maximum drop, aluminum 6063-T5 housing and a synthetic rubber polymer seal. The Pemko SA Series is a surface mount automatic door bottom that fastens to the face of the door rather than into a mortise, and carries a GREENGUARD Gold certified Eco-V insert. Choose the 225 when the door can be routed or is being prepped at the shop, and the SA Series when the door is already hung and cannot be machined.
4) Can a Pemko 345 door bottom sweep be used instead of an NGP 225 automatic door bottom?
They do different jobs. The Pemko 345 Series is a door bottom sweep with a rain drip and a PemkoPrene insert - the seal rides against the threshold at all times and is fixed to the door face. The NGP 225 is an automatic door bottom: the seal is retracted while the door swings and drops up to 7/8 inch only when the door closes, so it clears carpet and uneven floors. Use the 345 sweep where an exterior door needs continuous contact and rain shedding; use the 225 where the seal must lift clear on every swing.
5) Automatic door bottom or just a door sweep, which do I need?
An automatic bottom like the 225 retracts when the door opens and drops a seal only when it closes, so nothing drags on carpet or an uneven floor, and it seals tight for sound and smoke draft control. A fixed sweep such as the Pemko 345 Series hangs below the door all the time, which is simpler and cheaper but scuffs flooring and wears. Sweeps also come with a rain drip for exterior openings; the 345 does. Mortise automatic bottoms are the usual pick on interior commercial doors where acoustics or air leakage matter.
6) Will the NGP 225 hold up in an unheated warehouse or a door that sees direct sun?
Rated from -20 F to 200 F, with resistance to ozone, sunlight and aging. The extrusion is 6063-T5 aluminum for corrosion resistance and the seal is a PVC, nitrile (NBR) and chloroprene closed cell elastomeric foam blend, which is also flame and moisture resistant.
7) What do I have to specify when ordering the NGP 225?
Length and seal material are the two choices. Order the length to the door width (11 inch net through 60 inches), and the seal is offered in neoprene. There is also an optional 1/16 inch lead insert if the opening needs acoustic or radiation shielding, as in an imaging suite. Finish is mill aluminum.
8) Can I standardize on the same automatic door bottom across a building where some doors can be mortised and some cannot?
You can keep the same function but not the same part. The 225 needs a 3/4 by 1-15/16 inch mortise in the door bottom, so it only goes on leaves you can rout. For existing doors already hung, or leaves you cannot machine, a surface mount automatic bottom like the Pemko SA Series does the same job screwed to the face. The seal action is the same; the prep is what changes.
9) For a healthcare or school project specifying a sustainable material, which door bottom carries an environmental certification?
The Pemko SA Series 36 inch surface mount automatic door bottom carries a GREENGUARD Gold certified Eco-V insert, which is the one to name when the submittal calls for a low-emitting material. The NGP 225 answers a different line on the spec: ANSI/BHMA A156.22 Grade 1 certification with a 1,000,000 cycle test rating, plus heat and cold performance testing and a -20 F to 200 F operating range for commercial healthcare, education and government facilities.
10) Which door bottom seal is simplest to install on an existing hung door without machining it?
The Pemko 345 Series door bottom sweep is the simplest - it mounts to the door face and adds a rain drip, with no routing at all. The Pemko SA Series is the next step up: a surface mount automatic door bottom that still avoids machining but gives you a seal that lifts on the swing. The NGP 225 requires a 3/4 inch by 1-15/16 inch mortise cut into the bottom of the door, which is straightforward on a shop-prepped door and considerably more work on one already in the frame.
11) For a 36 inch door needing an automatic door bottom, what are the options for a mortise versus a surface application?
For a mortised application the NGP 225 covers 36 inches within its 11 inch net to 60 inch length range, is field cuttable up to 4 inches on units 36 inches and longer, and is certified to ANSI/BHMA A156.22 Grade 1 at 1,000,000 cycles. For a surface application at the same width, the Pemko SA Series is offered in a 36 inch automatic door bottom with a GREENGUARD Gold certified Eco-V insert. The decision is whether the door can take the 3/4 inch by 1-15/16 inch pocket the 225 needs.
12) What should I use on an exterior door where water runs down the face, instead of a mortise automatic door bottom?
The Pemko 345 Series door bottom sweep includes a rain drip along with its PemkoPrene insert, so runoff is thrown clear of the threshold rather than tracking under the door. The NGP 225 is a mortise automatic door bottom with no drip element; its seal material is a PVC, nitrile rubber and chloroprene closed cell blend rated for -20 F to 200 F with resistance to ozone, sunlight and aging, which suits it to weathersealing duty once a separate drip cap handles the water.
13) Is the NGP 225 heavy enough for school and hospital corridor doors?
It is a commercial grade unit, Grade 1 certified at 1,000,000 cycles, which is the durability class you want on classroom, patient room and office corridor doors that cycle all day. The mortised aluminum body keeps the mechanism inside the leaf rather than exposed on the face where carts and mops hit it.
How fast can I get the NGP 225N 34 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 225N 34 come with a warranty?
Absolutely. The NGP 225N 34 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 225N 34?
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 225N 34 from ZenSupply?
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