Materials & performance
SCHOTT NEXTREMA®: the glass that makes a difference in patio heaters
A premium patio heater is not only an emitter inside a metal casing. Behind reliable warmth on a cold evening, there are deliberate technical choices, carefully selected materials and one component that is often overlooked: the glass. Yet this front panel influences safety, durability, infrared transmission and the real performance of the appliance. This is where SCHOTT NEXTREMA® stands apart.
What cold and heat do to ordinary materials
Any material exposed to strong temperature variations expands, contracts and accumulates internal stress. Over time, repeated cycles can weaken even apparently solid components. A patio heater lives with this constraint every time it is switched on and off. The surface rises quickly in temperature, then cools down again, sometimes in humid air or after a sudden outdoor temperature drop.
SCHOTT NEXTREMA® was developed for this type of demanding environment. Its resistance to thermal shock up to 820 °C and its continuous operating temperature up to 950 °C are not decorative claims. They are measurable properties that explain why this glass-ceramic material is used where standard glass would not be appropriate.
Why infrared transmission matters
Heating a terrace with infrared technology does not mean heating all the surrounding air. The goal is to send radiant energy directly towards people and nearby surfaces, much like the sun can warm you even when the air remains cool. This direct transfer is what makes infrared patio heating useful outdoors, where wind quickly removes warm air.
The protective glass must therefore perform two roles at once. It must protect the emitter from contact, dirt and outdoor conditions, while allowing the useful radiation to pass through with minimal loss. NEXTREMA® is valued because it offers a broad transmission range across visible and infrared wavelengths. The result is more useful heat, better energy efficiency and a more consistent feeling of comfort.
Dimensional stability for long-term reliability
In a well-built patio heater, several materials work together: stainless steel, ceramic components, heating elements, seals and the protective glass. They do not all react to heat in the same way. If their expansion is not controlled, mechanical stress appears at the interfaces and the most fragile part will eventually fail.
NEXTREMA® has a near-zero coefficient of thermal expansion. It remains dimensionally stable across a wide temperature range, allowing precise assemblies and reducing fatigue over time. For manufacturers, this simplifies the design of durable appliances. For users, it means fewer failures, less maintenance and a heater that keeps its performance season after season.
Outdoor use is more demanding than it looks
A terrace is not a laboratory. It is a living space exposed to rain, cold air, humidity, grease deposits, cleaning products, dust and UV light. Materials that perform well indoors can age quickly outside when they have not been selected for this environment. This is even more important in a restaurant terrace, hotel area, bar terrace or covered professional outdoor space where equipment is used frequently.
The surface of NEXTREMA® is dense and non-porous. It does not absorb liquids or gases easily, resists common chemical exposure and keeps its optical and mechanical properties with regular cleaning. For professional installations, easy maintenance is not a detail. It helps preserve hygiene, presentation and the long-term appearance of the heating system.
Safety, durability and responsible design
Choosing a material such as NEXTREMA® reflects a serious approach to quality. It avoids saving on a critical component that may create problems later. A glass panel that fails after two winters means downtime, replacement parts, service intervention and loss of confidence in the installation.
A premium outdoor radiant heater must remain dependable under repeated use. This is especially true for professional terraces, where the heater is part of the customer experience. By using proven materials, the appliance is better prepared for heavy use, sudden temperature changes and the practical constraints of outdoor service.
A material used beyond patio heating
NEXTREMA® is not only relevant for patio heaters. Similar glass-ceramic properties are used in industrial ovens, laboratory equipment, professional cooking appliances and high-temperature lighting systems. This wider use confirms the material’s ability to remain stable, transparent and reliable under demanding conditions.
For an outdoor infrared heater, this matters directly. The glass must protect, transmit and last. NEXTREMA® is not simply a visible front panel; it is part of the performance of the whole heater.
To explore the relevant models, see Heatscope heaters.
Premium Infrared Heating • Design & Performance • 3000W Heatscope® Pure Al…
Premium infrared heater • Integration & discretion • 3000WHeatscope® Pure White:…
Schott Glass Edition • 2400W • Smart IoT • Plug & Play Heatstrip Enhance 2…