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Save energy and reduce heat loss with Dowell ThermaLine™ Aluminium Windows
Dowell Thermaline™ is the ideal window for winter. The best thermal performance (WERS rated) aluminium windows on the Australian market, their design reduces the flow of heat through windows* for a home that stays warmer longer. They'll keep the warmth indoors with up to 82% improvement in heating and less reliance on the heater reduces your energy bills.

*Measured as a window's 'U-value'. The lower the 'U-value' the more effective it is at preventing heat transfer through the window.

Change the way you think about energy efficient building and design with Dowell's new ThermaLine™ range
Stay warmer in winter and cooler in summer with Dowell Thermaline™ Awning windows, Multi-Transom Awning windows, Sliding windows and Fixed-Light windows.

Tired of wiping the inside of wet window sills on really cold days? Dowell Thermaline™ windows have a low condensation index which means less condensation or moisture on windows. And if you usually avoid sitting in front of the window because of cold draughts, a strong air seal and optional bubble seal on Thermaline™ windows will help make you comfortable.

Awning and Multi-transom Awning Windows
Full-width winder support on Thermaline™ Awning windows are easy to clean with 7 year warranty and full-height floor-to-ceiling fixed-light windows are also available.

Sliding Windows
Don't compromise on your dream design. When it comes to building or renovating your home, Dowell Thermaline™ windows slimline frames provide wide uninterrupted views. They are affordable and easy to install with the reveal positioned in line with the aluminium extrusion. So now you can have more glass, natural light and space without losing the heat or cool to the outdoors.

 


An Energy Efficient House with Dowell ThermaLine Windows Keep your home office comfortable Keep your bedroom comfortable Aluminium Window Frame with Thermal Break Technology