
1/5
I Have the Coldest Bedroom. But This Fancy Space Heater Finally Did the Trick. | Reviews by Wirecutter
The author explores the Boldr Kelvin, a unique far infrared space heater, to address a persistently cold bedroom. Unlike traditional convection heaters that warm the air, the Kelvin uses far infrared heat, which directly penetrates the skin, providing a sensation akin to natural sunshine. This approach allows it to deliver comfort with significantly less energy consumption, using only 450 watts compared to the 1,500 watts of typical space heaters on high settings, or 750 watts on low. The article highlights that despite its lower wattage, the Kelvin effectively maintains a comfortable temperature, acting as a supplement to existing HVAC systems in specific rooms where primary heating is insufficient.
A key feature of the Boldr Kelvin is its sleek glass panel design, available in black or white, which allows it to blend seamlessly into various home aesthetics, resembling a modern mirror or a turned-off television. The glass surface, once heated, acts as an isotropic radiator, dispersing infrared heat evenly in all directions, ensuring warmth is felt consistently regardless of distance or position within the room. This overcomes a common limitation of many infrared heaters, which often require direct proximity to be effective. The heater is completely silent, lacking fans or moving parts, which eliminates noise, air movement, and the stirring of dust. Its wall-mountable design also saves valuable floor space, a significant advantage in smaller rooms, and keeps it out of the reach of children or pets.
The Kelvin comes with a remote temperature sensor, a ping-pong-ball-sized device that connects via Bluetooth, allowing for accurate temperature readings and more effective heat distribution across a room. This sensor helps the heater to activate only when needed, maintaining a set minimum temperature. However, the article also points out several drawbacks. The Kelvin is not designed to significantly raise ambient air temperature, as its primary function is to heat objects and people directly. The glass surface gets very hot, reaching around 175°F, posing a burn risk, especially for curious children. The remote sensor, while useful, can also attract children or pets, creating a potential hazard. Installation is semi-permanent, requiring drilling into walls, which may be challenging for some individuals.
Another consideration is the unsightly power cord, which dangles from the wall-mounted unit and may require additional solutions like cord covers for a cleaner look. The Boldr app, used for controlling the heater, is still under development, with some glitching and limitations in its scheduling and energy tracking features. Finally, the Boldr Kelvin is considerably expensive, retailing at $400, which is significantly higher than most conventional space heaters. While its energy efficiency might offer long-term savings, the initial investment is substantial. Despite these challenges, the author concludes that the Boldr Kelvin successfully solved a long-standing issue of a cold bedroom, making it a valuable solution for specific heating needs, particularly in rooms that are difficult to warm with standard methods.
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