Description
High-security Commercial Horizontal Mailboxes Made in the USA

Redefine Your Wall-Mounted Mail Experience: National Mailboxes introduces the H4C16D-15, a revolutionary addition to their 4C horizontal mailboxes lineup. This 16-high unit, featuring 15 tenant doors, 3 parcel lockers, and an outgoing mail slot, sets a new standard for mail management in multi-tenant buildings, offering an unparalleled combination of capacity, security, and convenience.
Crafted with American Pride: Each H4C16D-15 unit is meticulously designed and manufactured in the United States, showcasing the exceptional quality and workmanship that American manufacturing is renowned for. Experience the difference of a product crafted with pride and expertise in the USA.
Unrivaled Security Features:
- Exceeds USPS STD-4C requirements for wall-mounted mail receptacles
- Reinforced construction offers superior protection against tampering and theft
- Provides ultimate peace of mind for property managers and tenants alike
Maximizing Wall Space Efficiency: The H4C16D-15’s intelligent design optimizes horizontal space, accommodating an impressive array of tenant compartments, parcel lockers, and an outgoing mail slot within its streamlined 16-high frame. Perfect for apartments and multi-tenant buildings with limited wall space, this unit maximizes mail distribution capacity while upholding the highest standards of security and accessibility.
Setting New Standards in Accessibility: Meticulously engineered to meet Fair Housing ADA installation requirements, the H4C16D-15 ensures equal access for all tenants. By prioritizing accessibility alongside capacity and security, this state-of-the-art unit redefines inclusive mail management in multi-tenant environments.
Versatility Across Applications: Whether you’re overseeing a residential complex, a commercial property, or a private delivery system, the H4C16D-15 seamlessly adapts to your specific needs. Its wall-mounted design and USPS-approved status make it the perfect choice for a diverse range of applications, guaranteeing efficient and secure mail distribution across various settings.
Enhancing Architectural Sophistication: With its sleek, contemporary aesthetics and space-saving profile, the H4C16D-15 elevates the visual appeal of any building. Showcase your commitment to secure, efficient mail management while adding a touch of modern refinement to your property’s architectural landscape.
Step into the future of wall-mounted mail management with the H4C16D-15 from National Mailboxes. Combining American craftsmanship, unrivaled security, and smart space optimization, this groundbreaking unit transforms mail distribution in multi-tenant environments. Upgrade your property’s mail strategy and provide your tenants with a secure, accessible, and efficient 4C horizontal mailboxes solution that surpasses expectations.
Unit Size: 56-1/2″H x 31-9/16″W x 17″D
Total Doors: 15 Tenant Compartments, 3 Parcel Lockers
Tenant Compartment Sizes: 3″H x 12″W x 15″D
Parcel Locker Sizes: 2 Compartments 15″H x 12″W x 15″D, 1 Compartment 17″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:
- 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:
- H4C16D-15 Cut Sheet
- 4C Wall Mount Units Installation Manual
- 4C Surface Mount Collar Installation Manual
- Care and Cleaning
- Sustainability & Leed
- Warranty
Related Top Selling Commercial Mailboxes:
- 8 to 15 Door Freestanding Depot Enclosures with 4C Horizontal Mailboxes
- Traditional Decorative Style Cluster Box Units – USPS Approved
- Front Loading Standard Horizontal Mailboxes – USPS Approved for Replacement
Similar 4C Horizontal Wall Mount Mailboxes:
- 15 Tenant Doors with 2 Extra Large Parcel Lockers – 4C Wall Mount 14-High Horizontal Unit
- 15 Tenant Doors with 2 Parcel Lockers – 4C Wall Mount 13-High Horizontal Mailbox Unit
- 16 Tenant Doors with 2 Extra Large Parcel Lockers – 4C Wall Mount 15-High Horizontal 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?





















