Description
High-security Commercial Horizontal Mailboxes Made in the USA

H4C15D-28: Scaling New Heights in Mail Management Innovation
National Mailboxes unveils the H4C15D-28, a cutting-edge solution in their secure delivery arsenal. This towering 15-high wall-mounted unit, featuring 28 tenant doors and an outgoing mail slot, redefines mail distribution for high-density urban environments. Proudly manufactured in the USA, this system exemplifies the pinnacle of vertical efficiency and capacity.
Elevating Expectations, Defying Gravity: Shatter the ceiling of conventional mail management. The H4C15D-28 harnesses every available inch of vertical space, offering an unparalleled solution for the most demanding multi-tenant needs in soaring urban landscapes.
Dual-Function Excellence at Peak Performance:
- Surpasses USPS STD-4C requirements, delivering fortress-like security in a sleek, towering package
- 15-high configuration with 28 tenant doors maximizes mail flow in vertically-oriented spaces
- Seamlessly integrates with avant-garde architectural visions, enhancing building aesthetics
Adapting to the Pulse of Urban Ascension: From ambitious residential skyscrapers to towering corporate hubs, this versatile unit effortlessly meets the dynamic mail handling demands of today’s ever-reaching cityscapes.
Championing Accessibility at New Altitudes: Meticulously engineered to exceed Fair Housing ADA standards, the H4C15D-28 ensures universal access without compromising on capacity or security, even at its impressive stature.
Seamless Integration for Visionary Developers: Property managers will applaud the unit’s adaptable wall-mount design, perfect for both groundbreaking super-tall structures and ambitious high-rise renovations aiming to maximize vertical efficiency.
Redefining Communication Hubs for Tomorrow’s Mega-Cities: Embrace the vanguard of urban mail management. The H4C15D-28 isn’t just a mailbox – it’s a testament to efficient, accessible, and future-proof living in the vertical metropolis.
Innovation at the Apex of Regulatory Compliance: While pushing the boundaries of vertical design to new limits, this unit strictly adheres to all USPS and building standards, ensuring a lasting solution for even the most ambitious high-rise projects.
Investing in the H4C15D-28 means choosing a system that prioritizes versatility, security, and domestic craftsmanship on an unprecedented vertical scale. Experience the next evolution of commercial mailboxes designed for the soaring urban landscape. Whether you’re overseeing a record-breaking residential tower, a state-of-the-art corporate headquarters, or a visionary mixed-use development touching the clouds, this unit is engineered to surpass expectations and revolutionize your mail operations while ensuring compliance and accessibility for all tenants in our ever-growing vertical urban environments.
Unit Size: 54-3/4″H x 31-9/16″W x 17″D
Total Doors: 28 Tenant Compartments
Tenant Compartment Sizes: 3-1/4″H x 12″W x 15″D
Outgoing Mail Compartment: 6-1/2″H x 12″W x 15″D
Colors: Antique Bronze, Black, Dark Bronze, Gold Speck, Postal Grey, Sandstone, Silver Speck, and White
Product Features:
- NOT USPS Approved (Local Post Office Approval Required-Due to No Parcel Locker Compartments for Packages which is a NEW USPS Postal Requirement))
- Front Loading Horizontal Style
- All Tenant Locks and Keys are Included
- Superior strength, corrosion resistance, and exceptional durability for indoor AND outdoor installations
- Tenant doors include heavy duty, dustproof cam locks each with 3 keys
- Parcel Locker doors include heavy duty dustproof lock with 3 keys which secures the collection bin until pickup is made
- Includes one outgoing mail compartment with slot, anti-fish comb for security, and protective hood
- Tenant Door Identification options include Standard Number Plates, Custom Number Plates, or Custom Engraved Numbering (Increases Lead Time)
- Made of heavy gauge aluminum
- USPS Approved to STD-4C regulations required for all new construction and major renovation projects
- 4C standard mailboxes are fully-recessed for in-wall mounting. Surface-mount collar and kiosk kits are available at an additional charge.
- USPS regulations require a minimum of one parcel locker for every ten tenant compartments and one outgoing mail slot per unit
- Factory installed integral trim surrounds mailbox and unique MUCK (multi-unit connector kit) included for easy installation of multiple 4C mailboxes
- Minimum wall depth of 17″ required for Fully-recessed 4C mailboxes
- Please Note: This large commercial mailbox is made to order and is non-returnable
Downloads:
- H4C15D-28 Cut Sheet
- 4C Wall Mount 15-High Suite
- 4C Wall Mount Units Installation Manual
- 4C Surface Mount Collar Installation Manual
- Care and Cleaning
- Sustainability & Leed
- Warranty
Related Top Selling Commercial Mailboxes:
- Freestanding Depot Enclosure with 4C Horizontal Mailboxes
- Traditional Decorative Style Cluster Box Units – USPS Approved
- Horizontal Wall Mount Rear Loading Mailboxes for Private Use/Access (Style)
Similar 4C Horizontal Wall Mount Mailboxes:
- 29 Tenant Doors with 1 Outgoing Mail – 4C Wall Mount Max Height Horizontal Mailbox Unit
- 26 Tenant Doors with 1 Outgoing Mail – 4C Wall Mount 14-High Horizontal Mailbox Unit
- 24 Tenant Doors with 1 Outgoing Mail – 4C Wall Mount 13-High Horizontal Mailbox Unit
4C Mailboxes FAQs:
- Are 4C Mailboxes Easy To Install? A Comparison
- Are Any Types of Commercial Mailboxes Being Phased Out?
- Are There Special Requirements for 4C Mailboxes?
- What are NEW Freestanding Depot Enclosures with 4C Horizontal Mailboxes?
- What Are 4C Recessed and Surface-Mounted Mailboxes?
- What Are the Benefits of 4C Mailboxes?





















