Hormann Thermo46 Style 400l (cathedral glass)-1
Hormann Thermo46 Style 400l (cathedral glass)-2

Hormann Thermo46 Style 400l (cathedral glass)

£1,494.36

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Description Additional Info Specification PDF Downloads Warranty

The Hörmann Thermo46 Style 400L door is a bold statement piece that combines generous glazing with modern design. Its sidelight (“L”) configuration allows more natural light in while maintaining strength and insulation, giving your entrance a brighter, more open feel without compromising on performance.

Efficient Thermal Insulation
Constructed with the Thermo46 standard, this door delivers a U-value of approx. 1.1 W/(m²·K), helping to retain warmth inside and reduce energy costs. The double-pane insulated glazing used for Style 400 (and variants like 400L) preserves thermal efficiency even with larger glass areas.

Dependable Security
You’ll get a 5-point locking system as standard, plus additional hinge-side security bolts to resist forced entry. The steel frame and durable fittings ensure strong protection, coupled with a high-quality glazing that meets safety standards.

Tailored to Your Style
Style 400L offers glazing options characteristic of the 400 styles, allowing you to choose decorative glass types (cathedral, ornament-glass etc.), with frames and leaf finishes and colour choices from the Hörmann range. Once your order is confirmed, we’ll send a detailed design/specification for your approval before it goes into production.

Why Choose the Hörmann Thermo46 Style 400L?
Elegant glazed design with sidelight for enhanced natural light
Excellent thermal performance even with decorative glazing
Secure multi-point locking with reinforced hinge protection
Flexible finishes and glass options to match your home’s aesthetic
Made from durable materials for long life and low maintenance

Hörmann Thermo46 & Thermo65 Entrance Doors

Secure, stylish, and energy-efficient, Hörmann’s Thermo46 and Thermo65 entrance doors offer the perfect combination of German engineering and modern design. Whether you're updating your main entry or side access, these doors deliver exceptional performance and kerb appeal.

Outstanding insulation – Up to 0.87 W/(m²·K) U-values with Thermo65; ideal for energy-conscious homes.

Built-in security – Multi-point locking system included as standard, with optional RC2-rated security upgrades.

Custom styles & finishes – Choose from a wide range of contemporary and classic designs, glazing styles, and over 20 finishes including Decograin timber effects and exclusive Matt deluxe colours.

High-end features – Quiet soft-closing locks, triple sealing (Thermo65), acoustic and fire-rated options, and flush door leaf design for sleek internal aesthetics.

Smart-ready – Optional SmartKey, fingerprint access, or smartphone unlocking via Hörmann BlueSecur app for ultimate convenience and control.

Whether you’re after visual impact or reliable performance, Hörmann entrance doors are built to last and tailored to your taste.

Feature Details
Models Available Thermo46 and Thermo65
Door Leaf Thermo46: 46 mm
Thickness Thermo65: 65 mm
Construction Solid steel door leaf with PU rigid foam core insulation
Thermal Performance U-values as low as 0.87 W/(m²·K) (Thermo65
Security Features Multi-point locking as standard Optional RC 2 security upgrade
Sealing Triple all-round sealing (Thermo65)Double sealing (Thermo46)
Glazing Options Triple or laminated safety glazing available on selected models
Surface Finishes Multiple RAL colours, Decograin timber-look, and exclusive Matt deluxe finishes
Smart Access Options Compatible with Hörmann SmartKey and BlueSecur app (optional)
Opening Direction Inward-opening as standard
Frame Material Aluminium frame with thermal break
Internal Finish RAL 9016 Traffic White (standard)
Sizes Available Standard and made-to-measure optionse
Certification CE-marked, tested to EN 14351-1
Warranty 5 years manufacturer’s warranty

Brochure: Click here 

Fitting Instructions: Click here

Warranty Information

All Hörmann Thermo46 and Thermo65 entrance doors come with a 5-year manufacturer’s warranty, covering all major components. This guarantee reflects Hörmann’s commitment to long-term performance, with rigorous endurance testing ensuring durability and reliability under real-world conditions. As one of Europe’s leading door manufacturers, Hörmann backs its engineering excellence with dependable aftercare for added peace of mind.