Windows that define the way a home feels

Comfort, efficiency, and design now go hand in hand when it comes to choosing windows and doors. With up to half of a home’s heat able to escape through substandard windows and doors, homeowners are demanding smarter solutions—moving beyond double glazing to high-performance thermal systems that look as good as they perform.

Modern systems like Altherm’s ThermalHeart+® and Centrafix®installation, available through Design Windows, deliver on these expectations, creating homes that are warmer, quieter, and more comfortable.

Altherm’s ThermalHeart+® window systems combine thermally efficient aluminium frames with the AGP System® double glazing with Solux-E® low-e coating, almost doubling the performance of standard aluminium. For homeowners, this translates into lower energy bills, reduced condensation and mould risk, improved indoor air quality, and year- round comfort. Centrafix® installation takes performance even further, increasing thermal efficiency by over 20% by recessing glazing into the insulated wall zone.

ThermalHeart+® is a New Zealand-made and designed range of code-compliant, industry-leading window products. Sitting at the crossroads of design and functionality, ThermalHeart+® window systems provide the superior insulation homeowners now expect, while the Centrafix® option pushes performance further with enhanced thermal efficiency and a sleek, contemporary look. Both systems meet, and often exceed, today’s stricter H1 building code requirements. And by reducing external noise, these high-performance systems create calmer spaces for living, sleeping, and working.

Daniel Smith Builders used the system in their Twin Gables project. For them, installing the system was straightforward, robust, and well-thought-out. “Using Centrafix® was a great experience from both a builder’s and homeowner’s
perspective,” says Dan.

“The direct-fix framing flange gave me real confidence in the strength and weathertightness of the product, and heading into winter, the thermal performance has been impressive.”

Design Windows is also currently working with Latch Build, who opted for Metro Series ThermalHeart+® with Centrafix® windows on their own home in Wanaka. “The result is a warmer, more energy-efficient home with a clean, contemporary finish that looks great against our brick and cladding,” Latch Build says.

Design Windows takes pride in bringing these innovations to life, working closely with architects, builders, and clients to ensure every project meets the original design intent while delivering maximum performance. With ThermalHeart+® window systems, Kiwis can be confident that their windows and doors are meeting and exceeding New Zealand standards, while keeping up with modern design features that shape the look and feel of their home.

Centrafix® is exclusively available in Metro Series ThermalHeart+® windows and doors.