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Post Boxes | Letter Boxes | Mailboxes | Post Boxes UK

H370 1 Fireproof Letter Boxes Post Box Mailbox

H370 1 Fireproof Letter Boxes Post Box Mailbox

Another frequently specified unit, H370-1 fireproof letter boxes are the wider yet shallower version of our best selling model H300-1 unit. This multi occupancy mailbox is best suited to larger lobby areas in which a focal point is to be achieved - its width lending itself well to landscape style banks of mailboxes. It is suitable for both small scale apartment and flat projects and the largest of multi-use developments. It is also available as an extra large capacity mailbox - our models H370-2 and H370-3.




This horizontal post box has dimensions of 370mm width, 110mm height and a standard depth of 270mm (also available with extended depth of 380mm). A popular unit it has become an industry standard across Europe for high density residential schemes and commercial office developments. It is a front-entry front-retrieval unit (in-front, out-front) and conforms to EN13724 (accepts A4 mail without having to fold or bend the post, has anti-theft baffle to aperture) and is Royal Mail approved. Where applicable, it complies to Secured By Design requirements (clauses 21.19 and 24.6).

H370-1 fireproof letter boxes are designed to incorporated and assembled into larger banks - typically, from small banks of 6 units up to larger banks of 300+ units. The model H370-1 mailbox is most suited to large scale city centre residential schemes and student accommodation.

The H370-1 fireproof letterbox is available in any RAL finish, many of which are stock. Non-stock finishes incur a surcharge for small orders. Different gloss levels can also be specified as required. It also come in marine grade 316 satin (brushed) stainless steel.

It is suitable for both internal and external use with a choice of different casings, surrounds and support legs.

It comes fitted with an internal fire extinguisher which operates once the temperature inside the post box reaches 70 degrees Celsius - this takes approximately 7 second, and comletely extinguishes any fire within the post box. This can be a much more economical solution than specifying a bank of fire rated letter boxes - call Post Boxes UK to find out about our cost saving solutions.


  • Horizontal fireproof letter boxes suitable for internal or external use, either wall mounted, wall recessed, or free standing on support legs.
  • Dimensions per unit: 370 x 110 x 270/380mm (width, height, depth).
  • Aperture size: 325 x 35mm. Conforms to EN 13274 (accepts A4 envelope without having to fold or bend; anti-theft flap to inner aperture).
  • Manufactured and bank-assembled in Europe.
  • Secured By Design compliant (clauses 21.19 and 24.6) where applicable.
  • Anti arson mailbox / fire proof compatible.
  • Mailbox body and door manufactured from steel, flap manufactured from cast aluminium.
  • High / large capacity letter boxes available – model H370-2 and H370-3.
  • Each post box comes complete with 2 keys (204 differs). Additional mailbox keys available at time of order only.
  • Secure postbox, with 1.2mm thick steel doors, high security Eurolock cylinder lock and extra wide anti-pilfer baffle flap to inner aperture.
  • Hinged to right, side opening.
  • Available in any RAL colour of choice – please see our RAL colour chartAlso available in satin (brushed) stainless steel, and bronze, silver and gold anodised finishes.
  • Numbering and lettering to flap can be specified for an additional charge.
  • Choice of surrounds and support legs depending upon type of application.
  • Blank door (without flap) and parcel shelf system can be specified for uneven bank configurations.
  • Post Boxes UK recommends a maximum bank size of 72 multiple mailboxes in a six wide twelve high configuration (6w 12h). Should you wish to specify a larger bank size than this, please call us on +44 (0)121 288 0838 to discuss.


Should you require any further information regarding H370-1 fireproof letter boxes or wish to discuss your enquiry, please call Post Boxes UK today on +44 (0)121 288 0838. Alternatively, your enquiry can be emailed to and where possible, we would that drawings be sent in pdf format. Thank you.

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