Product Overview
If you’re replacing windows in a listed building or conservation area, the Smart Alitherm Heritage range offers a way to meet planning requirements without compromising on performance. The slim 59mm sightlines match the proportions of traditional steel fenestration, while the aluminium construction means no rust, no repainting, and far better thermal efficiency.
Available as fixed panes, top-hung or side-hung casements, and tilt-and-turn configurations, it suits a range of property styles, from Victorian terraces to 1930s Art Deco apartments. Hardware options include period-appropriate Monkey Tail and Bulb-End handles.
This product is part of the Smart Alitherm Heritage range, along with the Heritage Aluminium Doors.
Design and Configuration Options
Available as fixed, top-hung, side-hung, or tilt-and-turn windows. Larger assemblies can be constructed from multiple horizontal modules joined with couplers.
Powder-coated in any RAL colour, including dual-colour options. Metallic, textured (Sensations), and anodised-effect (Alchemy) finishes are also available.
Heritage hardware includes Monkey Tail and Bulb-End handles, plus Art Deco options. All hardware can be colour-matched, and marine-grade stainless steel fittings are available for harsh environments.
Open Out Casement
Tilt and Turn
Features
Period-appropriate hardware
Monkey Tail, Bulb-End, and Art Deco handle options to suit Victorian and interwar properties
Multiple configurations
Available as fixed, top-hung, side-hung casement, or tilt-and-turn windows
Technical Details
Thermal & Efficiency
- U-value: 1.6 W/m²K (with 1.0 W/m²K glazing unit)
- WER rating: B
- Thermal break: Polyamide
Weather Performance
- Air permeability: Class 4
- Water tightness: Up to Class 7A (internally beaded)
- Wind resistance: AE2400
Frame & Glazing
- Frame depth: 47mm
- Typical sightlines: 59mm
- Glazing options: 24mm, 28mm, 32mm, or 36mm sealed units
Maximum Sizes
- Fixed windows: Up to 2100 × 2100mm
- Top-hung casement: Up to 1400 × 1400mm
- Side-hung casement: Up to 600 × 1400mm
Enquire Now
We’ll endeavour to get back to you with your quote within 24 hours or less by email.