

Linx Square
From £500
Free Samples
See the finish before you commit
Trade Account
Trade prices on every range
Expert Advice
Speak to our team · 020 4634 2203
Free Delivery
On orders over £300
Sold By The m²
Calculator on every tile and floor
Klarna & PayPal
Spread the cost, subject to status
Free Samples
See the finish before you commit
Trade Account
Trade prices on every range
Expert Advice
Speak to our team · 020 4634 2203
Free Delivery
On orders over £300
Sold By The m²
Calculator on every tile and floor
Klarna & PayPal
Spread the cost, subject to status

Trade Prices
Always trade prices, never retail markup.
UK Delivery
£50 flat rate • up to 20 business days.
FENSA Fitting
Professional install available.
by Linx Square
Price on request — contact us for availability and a quote
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Combining outstanding value and quality, with class-leading performance and security, Alitherm 400 delivers a range of stylish, energy-efficient window and single and double door options.Fully compliant with Part L of the Building Regulations, this versatile system is perfect for a wide range of both new build and refurbishment projects, including, schools, colleges, hospitals, offices and public sector housing – as well as individual homes. In fact, the system’s supreme flexibility makes it the ideal solution for almost any project.Both window and door systems provide excellent weather and thermal performance and are available in a huge range of colours. Combining elegant aesthetics and outstanding security performance (the system is approved to PAS:24 2022), Alitherm 400 is the ultimate window and door system for architects, developers, fabricators and installers.Available in fixed, side hung, top hung, tilt & turn and flush casement options, Alitherm 400 windows deliver excellent thermal and weather performance, as well as the security assurance provided by PAS24 approval.(For sizes outside these parameters, contact the Smart Technical Support team) Typical Values different glass, profiles and door configurations will vary U Value and Window Energy Rating 1. U Value based on opener next to fixed 1230 x 1480 using glass Centre Pane 1.0 2. WER based on opener next to fixed 1230 x 1480 using glass Centre Pane 1.2 and g value 0.74