Best Window Heaters of 2026
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Window heaters are an innovative solution to combat the cold and draftiness of traditional windows during winter months. These heaters are designed to be installed directly onto windows and provide targeted heat to the immediate area. With their sleek and compact design, they are a great alternative to bulky space heaters and can help to reduce energy costs by focusing heat on specific areas rather than heating an entire room. Window heaters are a practical and efficient way to stay warm and cosy during the colder months.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 5 Window Heaters
Devola Smart Wifi Electric Glass Panel Heater 2000W
The Devola DVPW2000WH Heater is an award-winning electric panel heater that offers reliable and trusted performance, as recognised by the Good Housekeeping Institute 2025. It connects to your smartphone via WiFi, allowing you to control your heating easily and create personalised heating zones through the Alexa-approved Tuya Smart App. This smart feature brings convenience by giving you full control even when you’re away from home. The precise integral thermostat ensures your room temperature remains steady within half a degree, helping you reduce energy bills by switching the heater on or off automatically. With an IP24 splash-proof rating, it is safe for use in areas prone to moisture and comes with wall mounting brackets for easy installation.
Devola Wifi Enabled Smart Electric Glass Panel Heater 1500W | Alexa Heating Control, Open Window Detection
JSH WiFi Electric Glass Panel Heater 2000W
The JSH Electric Glass Heater offers modern convenience with its Wi-Fi capability, allowing you to control your heating from your smartphone. You can create personalised heating zones, ensuring comfort in every room. With two energy-efficient power settings, it helps you save on heating bills while maintaining precise temperature control. The heater also features an open window detection system, which automatically adjusts to prevent unnecessary energy waste. This ensures a warm home without overspending.
JSH WiFi Enabled Electric Glass Panel Heater
The JSH Electric Glass Panel Heater offers Wi-Fi connectivity, allowing you to control your heating conveniently from your smartphone. With its energy-efficient design, you can save on heating bills by automatically maintaining your desired temperature. Choose between two heat settings of 1000W and 2000W to suit your needs, and enjoy the added benefit of a built-in frost protection mode. The heater can be wall-mounted or used as a free-standing unit, giving you flexibility in placement.
Stiebel Eltron CK 20 Trend LCD Heater
The Stiebel Eltron CK 20 Heater is a wall-mounted rapid electric fan heater designed for quick room air heating, making it ideal as a supplementary or booster heater. Its compact plastic casing ensures it fits seamlessly into any space. You will appreciate the backlit LCD controls, which make it easy to adjust settings even in low light. With a convenient 7-day timer, you can programme heating schedules to suit your lifestyle, ensuring warmth when you need it most.
Frequently Asked Questions (FAQs)
1. Do heated windows exist?
Heated glass was first invented more than 60 years ago to keep condensation off the windshield of aircraft. Only recently has a more advanced technology been developed to incorporate heated glass into double-lite, Low-E sealed window units.
2. Why do heaters go under the window?
Placing the heat source under the window helps even out the hot and cold spots. Cold windows cause cool air currents in the room. The air next to the window cools more rapidly than the rest of the air in the room. This cold air is more dense, so it sinks to the floor.
3. How does a solar window heater work?
HOW IT WORKS. When placed in a window with Southern exposure, interior cool air is drawn through the lower air intakes by the solar powered fan. The collector cells are heated by infrared energy from the sun. Through convection, the air passes through the collectors and retains the barrier heat.
4. Can you open window with heater on?
During the heating season when the outside temperature is below 50-degrees, all windows must be kept closed to prevent waste. During the winter when the outside temperature is below freezing, leaving a window open, even one inch, can freeze the heat lines beneath the window and cause a flood.
During our window heater research, we found 105 window heater products and shortlisted 5 quality products. We collected and analyzed 47,537 customer reviews through our big data system to write the window heaters list. We found that most customers choose window heaters with an average price of £67.13.
The window heaters are available for purchase. We have researched hundreds of brands and picked the top brands of window heaters, including Devola, Jack Stonehouse, Stiebel Eltron.
Mohammed Clark is an architect and a contractor. His architectural skills are not limited to designing the plan for structures alone, but it extends to aesthetics and home décor. Before establishing his firm, he worked under a construction firm for eight years. Mohammed has gathered enough experience from his time practicing as a professional architect and now has vast knowledge in home designs and aesthetics.