Aluminium exterior door system
MB-79N SI+ aluminium exterior doors
The latest technology in your home.
MB-79N SI+ is a modern single- or double-leaf aluminium entrance-door system designed to meet increased thermal and acoustic requirements. Three-gasket sealing, a warming insert and a thermally broken threshold improve comfort, while the strong aluminium construction allows a wide range of design choices.
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Key features
A system designed for everyday comfort
- ✓Single- or double-leaf doors
- ✓Three-point espagnolette as standard
- ✓Three two-winged hinges
- ✓Aluminium threshold with a thermal break
- ✓Ug = 1.1 W/(m²K) glazing as standard
- ✓Warming and mounting inserts
- ✓Aluminium handle
- ✓More than 200 RAL colours, textures and special effects
Door cross-section

Technical data
MB-79N SI+ specification table
| Door type | Single- or double-leaf |
|---|---|
| Number of chambers | 3 |
| Installation depth | 70 mm |
| Thermal transmittance | Ud = 0.85 W/(m²K)* |
| Sealing | 3 EPDM gaskets |
| Standard glazing | Ug = 1.1 W/(m²K) |
| Lock | Three-point espagnolette |
| Hinges | Three two-winged hinges |
| Threshold | Aluminium with a thermal break; automatic seal available as an option |
| Colour range | More than 200 RAL colours, matt, metallic, textured and wood-effect finishes |
| Equipment | Warming insert, aluminium handle and mounting insert |
* The manufacturer's system introduction states 0.85 W/(m²K); its comparison table specifies 1.0 W/(m²K) for a glazed 1100 × 2300 mm example. We confirm the Ud for the selected construction; one value does not apply to every specification.
A choice for your entrance
Where to consider MB-79N SI+ doors
- Single or double leaf?
- Opening width and the required clear passage determine the choice. For double-leaf doors, agree the active leaf width and how the second leaf will be used.
- Comparing insulation
- Compare specific doors rather than headline system figures. Glazed and solid-panel infills can affect the whole-door Ud value differently.
An individual quotation
What determines the price of MB-79N SI+ doors?
Dimensions, infill, glazing, finish, handles, locks and accessories determine the MB-79N SI+ quotation. Installation, removal of the old door and reveal finishing are agreed for the site.
Send opening or door dimensions, a drawing or photo, preferred opening direction, finish and infill. Include the site location and work required so we can prepare an individual quotation.
Discuss a door quotationDoor selection and installation in Vilnius
Reiklitos projektai has provided window, door and terrace solutions since 2012. Measurement, installation and additional work are agreed for the site in Vilnius and the surrounding region.
Before you order
Questions about MB-79N SI+ doors
Can MB-79N SI+ doors have two leaves?
Yes, the manufacturer offers single and double-leaf configurations. Dimensions, clear passage and locking must be coordinated for the entrance.
Why can the manufacturer's Ud figures differ?
The system introduction shows 0.85 W/(m²K), while its comparison table gives 1.0 W/(m²K) for a glazed 1100 × 2300 mm example. For an individual order, we confirm the value for the selected construction.
Let’s start with a conversation
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