The electric heating market has moved on – and so has storage heating. ONYX represents a new generation of high heat retention storage heaters, designed for homes that demand efficiency, connectivity, and intelligent performance that genuinely delivers. This is not storage heating as you knew it; this is storage heating done properly.
At the core of ONYX is its exceptional heat retention. With up to 60% retained heat and storage capacity of up to 16 hours, ONYX dramatically reduces the need for daytime boost heating. Energy is captured when tariffs are lowest and released gradually, providing consistent comfort throughout the day while cutting unnecessary consumption. Compared to conventional storage heaters, this translates into significant energy savings and improved thermal stability, with warmth available when occupants actually need it.
Connectivity is where ONYX truly sets itself apart. Built-in WiFi Direct means no hubs, no gateways, and no additional hardware. Installation is straightforward and users gain instant access to full control via the Rointe NEXA app. From scheduling and temperature adjustment to real-time energy monitoring, everything is managed intuitively from a smartphone – anywhere, anytime.
Most importantly, ONYX features smart charging that actually works. Thanks to Inverter Smart Adaptive Technology, the heater intelligently regulates how much energy it stores based on usage patterns, room conditions, and demand. Instead of overcharging “just in case”, ONYX learns, adapts, and optimises, ensuring the right amount of heat is stored, every day. The result is greater efficiency, reduced waste, and consistent comfort without guesswork.
For homeowners, ONYX delivers lower bills, better comfort, and smarter control. For installers and specifiers, it offers a future-proof solution that aligns with modern energy standards and EPC improvement goals.
ONYX is not simply a new storage heater; it is the new benchmark for smart electric storage heating.
For more from Rointe, click here.
