Description
High-security Commercial Horizontal Mailboxes Made in the USA

H4C10D-18: Redefining Efficiency in Multi-Tenant Mail Management
National Mailboxes introduces the H4C10D-18, a revolutionary addition to their secure delivery solutions. This compact yet powerful 10-high wall-mounted unit, featuring 18 tenant doors and an outgoing mail slot, transforms mail handling in space-conscious environments. Proudly crafted in the USA, this USPS-approved system exemplifies innovation in high-density mail distribution.
Maximizing Space, Minimizing Footprint: Transcend traditional space limitations. The H4C10D-18 optimizes every square inch, offering unparalleled capacity in a surprisingly compact design.
Dual-Function Brilliance in Condensed Form:
- Surpasses USPS STD-4C requirements, ensuring top-tier security in a streamlined package
- 10-high configuration with 18 tenant doors maximizes efficiency in modest vertical spaces
- Seamlessly integrates with diverse architectural styles, enhancing aesthetic appeal
Adaptability for Evolving Urban Landscapes: From boutique apartment complexes to modernized office buildings, this unit effortlessly meets varied mail handling needs in environments where space is at a premium.
Championing Accessibility in Compact Spaces: Engineered to meet Fair Housing ADA standards, the H4C10D-18 ensures universal access without compromising on capacity or security.
Seamless Integration for Space-Conscious Developers: Property managers will appreciate the unit’s versatile wall-mount design, perfect for both new constructions and renovation projects where maximizing space is crucial.
Revolutionizing Mail Hubs for the Modern Era: Embrace the future of efficient mail management. The H4C10D-18 isn’t just a mailbox – it’s a statement in smart, accessible, and compliant urban living for space-conscious developments.
Innovation Within Spatial Constraints: While optimizing every inch, this unit adheres to all relevant USPS and building standards, ensuring a future-proof solution for even the most challenging multi-tenant spaces.
Investing in the H4C10D-18 means choosing a system that prioritizes efficiency, security, and domestic craftsmanship in a compact form factor. Experience the evolution of commercial mailboxes designed for space-conscious environments. Whether you’re overseeing a boutique residential complex, a modernized office space, or a mixed-use development where every inch counts, this unit is engineered to exceed expectations and streamline your mail operations while ensuring compliance and accessibility for all tenants.
Unit Size: 37-1/4″H x 31-9/16″W x 17″D
Total Doors: 18 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:
- H4C10D-18 Cut Sheet
- 4C Wall Mount 10-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:
- 16 to 29 Tenant Door Freestanding Depot Enclosure with 4C Horizontal Mailboxes
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- Front Loading Brass Wall Mount Horizontals – For Private Use/Access
Similar 4C Horizontal Wall Mount Mailboxes:
- 18 Tenant Doors with 2 Parcel Lockers – 4C Wall Mount 15-High Horizontal Mailbox Unit
- 16 Tenant Doors with 1 Outgoing Mail – 4C Wall Mount 9-High Horizontal Mailbox Unit
- 19 Tenant Doors with 1 Outgoing Mail – 4C Wall Mount 11-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?





















