Description
High-Security Commercial Horizontal Mailboxes Made in the USA

Unleash the Power of High-Capacity Mail Management: The H4C15D-28-D
National Mailboxes presents the H4C15D-28-D, a revolutionary solution in freestanding 4C depot commercial mailboxes. This powerhouse unit boasts an impressive 28 tenant doors and an outgoing mail slot, redefining efficiency in standalone mail centers.
Adaptability Redefined: From bustling university campuses to sprawling corporate complexes, the H4C15D-28-D thrives in diverse environments. Its versatile design allows for seamless indoor or outdoor installation, breaking free from traditional constraints.
Capacity Meets Innovation:
- 28 individual compartments cater to high-volume settings
- Outgoing mail slot enhances communication flow
- Streamlined design maximizes space efficiency
Compliance Without Compromise: Exceeding STD-4C requirements, the H4C15D-28-D stands ready for USPS approval. Its robust construction ensures longevity, while advanced security features protect sensitive correspondence.
Effortless Integration, Minimal Hassle: Facility managers rejoice! The H4C15D-28-D’s user-friendly design allows for quick installation and seamless integration into existing mail systems. Say goodbye to complex setups and hello to streamlined efficiency.
Versatility Across Sectors: Educational institutions, government agencies, private postal centers – the H4C15D-28-D adapts to them all. Its standalone nature makes it ideal for locations undergoing renovations or requiring flexible mail solutions.
Elevate Your Mail Center Aesthetics: Who says functionality can’t be stylish? The H4C15D-28-D’s sleek design complements modern architectural aesthetics while serving as a central hub for all mail-related activities.
Embrace the Future of Mail Handling: Step into a new era of communication logistics with National Mailboxes’ innovative design. The H4C15D-28-D isn’t just about organizing mail – it’s about revolutionizing your entire approach to information flow.
By choosing the H4C15D-28-D, you’re investing in a solution that balances high capacity, security, and adaptability. Experience the next evolution in freestanding 4C depot commercial mailboxes and transform your mail management capabilities. Whether you’re managing a school campus, a corporate center, or a government facility, this unit is engineered to exceed expectations and streamline your mail operations like never before.
Unit Size: 72-1/16″H x 32-11/16″W x 18″D
Total Doors: 28 Tenant Doors
Tenant Compartment Size: 3″H x 12″W x 15″D
Outgoing Mail Slot Size: 1/2″H x 9-5/8″W
Outgoing Mail Compartment Size: 3″H x 12″W x 15″D
Mailbox Colors: Antique Bronze, Black, Dark Bronze, Gold Speck, Postal Gray, Sandstone (shown), Silver Speck, and White. 4C Depot Enclosure and 4C Mailbox Unit may be different colors.
Product Features:
- Local Post Office Approval Required
- Includes Mounting Hardware & Special Tapcon Anchor Bolts Kit for Mounting/Securing 4C Depot Enclosure Bottom to Concrete Pad
- Front loading
- For indoor or outdoor use
- Includes a 4C Horizontal Mailbox unit and a matching Freestanding Depot Enclosure
- Provides a convenient means of installing 4C horizontal mailboxes in locations where a wall mounted application is not desired or available
- Tenant doors include heavy duty cam locks, each with 3 keys
- Front-loading 4C mailbox includes a master access door with Private Lock for delivery/service to mailbox
- Includes standard silver adhesive decals with black numbers for door identification
- Custom numbering and engraving available
- Constructed of heavy gauge aluminum and stainless steel components
- Features a durable powder coated finish available in a variety of stylish colors
- USPS STD-4C requires a minimum of 1 parcel locker for every 10 tenant compartments
- Outgoing mail compartment includes a mail slot, anti-fish comb for security, and protective hood for weather protection
- Ideal for use at colleges, schools, private postal centers, corporate mail centers, military bases, government agencies, and many other applications
- Please Note: This large commercial mailbox is made to order and is non-returnable
Downloads:
- H4C15D-28 Horizontal Mailbox Technical Drawing
- HDEP15D Depot Enclosure Technical Drawing
- 4C Depot Cabinet Installation Manual
- 4C Depot Family of Products
Related Top Selling Commercial Mailboxes:
- Standard High Security Cluster Box Units
- 4C Horizontal Wall Mount Mailboxes – 16 to 29 Tenant Doors
- Horizontal Wall Mount Mailboxes
Similar Freestanding Depot Enclosures with 4C Horizontal Mailbox Units:
- Freestanding Depot Enclosure with 4C Horizontal 29 Tenant Mailboxes
- Freestanding Depot Enclosure with 4C Horizontal 20 Tenant Mailboxes with 2 Parcel Lockers
- Freestanding Depot Enclosure with 4C Horizontal 19 Tenant Mailboxes with 2 Parcel Lockers
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?






















