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THE FUTURE OF HOME HEATING

KELVIN

A heater crafted to keep you comfortable, whilst saving you money on energy bills.

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Kelvin, smart electric heater in the sleek and elegant design in black, boldr
Kelvin, smart electric heater in the sleek and elegant design in black, boldr, image from the interior with kelvin, smart heating panel
Kelvin, smart electric heater in the sleek and elegant design in black, boldr, kelvin heater in the interior with ways to set up the heating for living room
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safety features of Kelvin, smart electric heater in the sleek and elegant design in black, boldr, in white

COST EFFECTIVE HEATER.

Kelvin

Kelvin is a cost effective, smart electric heater, designed to help you reduce energy consumption, save money and live more sustainably. Comes included with a truly wireless smart thermostat and access to the Boldr Energy mobile app. Simple to install, with zero maintenance.

Tax included.

Standard: 450W - Heats Up To 100 sqft (9 sqm)

£318
£318
£255 GBP
Sold out -19%

Kelvin

Delivery January 2025
30 Day Money Back Guarantee
Express Shipping Worldwide
2 Year
Warranty
Import duties & VAT included

Smart thermostat options

Every Kelvin heater comes equipped with a wireless smart sensor,

which you can upgrade with a Klima smart thermostat.

Every Kelvin heater comes equipped with a wireless smart sensor, which you can upgrade with a Klima smart thermostat.

Smart Sensor

App-control

Works with batteries

Included

Smart Thermostat

App + physical control

Temperature display

Premium materials

Upgrade now
Continue or upgrade

Continue or upgrade

Every Kelvin heater comes equipped with a Smart Sensor
and can be upgraded with a Smart Thermostat.

Every Kelvin heater comes equipped with a Smart Sensor and can be upgraded with a Smart Thermostat.

Smart Sensor

App-control

Works with batteries

Included

Smart Thermostat

App + physical control

Temperature display

Premium materials

Plug into outlet

Included wall mount & stand

Color
Aluminium Silver
Graphite Grey
Quantity
1
$359

One Smart Thermostat can be connected to all heaters in one room. *Upgrading to the Smart Thermostat removes the battery-powered sensors from the package.

COST EFFECTIVE
Kelvin heats with sustainable infrared technology, which is 30% more cost effective than traditional convection methods.
SMART
Be in control of your heating and spending from the comfort of your phone. Reduce energy consumption and simplify your home heating.
PLUG IN & PLAY
Powered by a standard mains socket. Comes included with a wireless smart thermostat.
MAINTENANCE FREE
Kelvin heaters are maintenance free and their function is constantly being upgraded through software. A heater that improves over time.

Home heating. Reimagined.

Kelvin delivers a new standard of electric infrared heating backed by a powerful smart home app that helps you save money and live more sustainably. Designed for simple and quick installation with both the homeowner and renter in mind, Kelvin integrates perfectly into any home aesthetic. Unlike other heaters, Kelvin comes included with a truly wireless smart thermostat that pairs to the BOLDR app to unlock a range of convenient energy saving features.

ENERGY SAVING

A smart heater

Take control over your heating and spending from the comfort of your phone. Enjoy a range of features that help you reduce energy consumption, improve convenience and offer real transparency into spending. Thanks to our constantly evolving software, your Kelvin improves with time. A better experience with every update.
  • Smart zoning
  • Remote access
  • Realtime cost monitoring
  • Smart scheduling
Make your heating work for everyone in the home. Adjust you comfort levels on a room by room basis & waste less energy.
Access the full range of smart features wherever you may be. Remote access give your total control of your heating so that you never have to come back to a cold home.
Stay on top of your bills from the comfort of your phone! Measure your consumption in real time, either room by room or as a house total.
Easily optimise your heating schedule on a room by room basis and cut your heating bills to an absolute minimum.

"Hey Google..."

Control your heating with your voice via Alexa or Google Assistant. Turn Kelvin on or off, adjust room temperature, turn on preset modes and more without lifting a finger.

FAR INFRARED

Cost effective heating

Kelvin uses sustainable far infrared heating technology to heat your home. Unlike traditional convection heaters that heat the air first, infrared heaters directly radiate heat to warm objects first. By not relying on convection heat, Kelvin can keep your environment warm whilst using 30% less energy than traditional electric heaters.

EFFORTLESS

Easy installation

Kelvin can be DIY installed in under 5 minutes with all screws and guides included in the box. For North American clients, we include dry-wall anchors for easy installation without any tools required. If you are not handy, no problem! You can get in touch with any handyman or local installer for quick and easy installation.

CLEAN DESIGN

EFFICIENCY NEVER LOOKED THIS GOOD
Constructed with premium materials and high quality finishes, the Kelvin has been engineered for your comfort but designed for your life. Designed from the ground up to integrate seamlessly into your home, everything you need to get set up in minutes comes included in the box — no unnecessary extras.
RELIABLE, ALWAYS

Ensuring a warm and safe home

Kelvin is backed by years of research and development. An essential part of the R&D process was ensuring Kelvin is certified to the EN 60335-2-30 and EN 60335-1 standards. These certifications ensure Kelvin meets the highest European safety standards. All models also have an IP44 rating allowing them to be used safely in bathrooms and kitchens, where resistance to water splashes and moisture is needed. Kelvin also complies with the more recent EU Lot 20 Legislation around heating efficiency.

SPECIFICATIONS

INCLUDED IN THE BOX

  • Kelvin
    Kelvin R1 450W
    Heating area
    		Up to 100 sqft (9 sqm)
    Based on 2.4 m. (7.9 ft) ceiling height and A+ insulation class
    Rated Input
    		450W
    Weight
    		9kg
    Rated Voltage
    		220/110V 50/60Hz
    Dimensions
    		960 x 500 x 12 mm (W x H x D)

    Plug
    		Correct plug type and voltage based on delivery address
    Wall-mount
    		Included
    Wireless Thermostat
    		Included
    WiFi Requirement
    		Works on standard 2.4GHz bandwidth
    Power Cord Length
    		177cm
  • Kelvin Large
    Kelvin Large
    Heating area
    		Up to 200 sqft (18 sqm)
    Based on 2.4 m. (7.9 ft) ceiling height and A+ insulation class
    Rated Input
    		700W
    Weight
    		13kg
    Rated Voltage
    		220-230V 50Hz / 110-120V 60Hz
    Dimensions
    		1200 x 600 x 12 mm (W x H x D)

    Plug
    		Correct plug type and voltage based on delivery address
    Wall-mount
    		Included
    Wireless Thermostat
    		Included
    WiFi Requirement
    		Works on standard 2.4GHz bandwidth
    Power Cord Length
    		177cm
See all See less

    HAVE QUESTIONS?

  • How do I install a Kelvin?

    accordion-icon

    Kelvin can be DIY installed in under 5 minutes with all screws and guides included in the box. For USA clients, we include dry-wall anchors for easy installation without any tools required. If you are not handy, no problem! You can get in touch with any handyman or local installer for quick and easy installation.

  • Where should I install a Kelvin?

    accordion-icon

    We recommend installing the Kelvin facing high areas of use. If it’s your home office, then the ideal positioning will be facing your work desk. This allows you to feel comfortable at lower air temperatures and maximise the energy saving capabilities of infrared heat.

  • How many Kelvin heaters do I need?

    accordion-icon

    That depends entirely on the size of the room you wish to heat and your ceiling height. We recommend the Kelvin Large heater for larger rooms of 10m²-19m² (107 sqft - 204 sqft) and the Kelvin Standard heater for rooms under 9m² (96 sqft) assuming a standard 2.4m (7.8ft) ceiling height.

Have more questions?

Reach us at [email protected]

Reviews

Customer Reviews

Based on 58 reviews
74%
(43)
14%
(8)
7%
(4)
2%
(1)
3%
(2)
L
Louis-Gregory Strolger
Excellent design, and heats well.

I like the Kelvin very much. My only feedback is there seems to (frequently) be some lag in scheduling between the app, the Klima themostat, and the Kelvin. There have been times when I come home to find the unit on, when it’s not scheduled to do so until much later. I also very much look forward to the Apple HomeKit Integration.

D
DANIEL MCLAREN
HEAVENLY WARMTH

Attractive and efficient.

B
BHaskett
Life changing for my cabin

Primary heat source in my cabin had been a wood stove. I have had 5 Kelvin panels installed for a year now and they have made such a difference for me. They now hold the preferred temp in the cabin (currently 16 F outside, 70 inside!) and I supplement with the stove during the day, when at home. No more waking up in the middle of the night to reload the stove or having to burn wood while I am out of the house. I had some initial issues with the app, customer service was always quick to respond. Electric consumption has been very reasonable. So glad that I made this investment, they really have changed the way that I live during heating season.

S
Steve Woolf

Kelvin

L
LAURINDA STOCKWELL
Trouble setting up unit

I'm having trouble setting up heating unit with my phone. It looks great and is heating but I need to figure out how to regulate temp with app on phone

123

Customer Reviews

Based on 58 reviews
74%
(43)
14%
(8)
7%
(4)
2%
(1)
3%
(2)
L
Louis-Gregory Strolger
Excellent design, and heats well.

I like the Kelvin very much. My only feedback is there seems to (frequently) be some lag in scheduling between the app, the Klima themostat, and the Kelvin. There have been times when I come home to find the unit on, when it’s not scheduled to do so until much later. I also very much look forward to the Apple HomeKit Integration.

D
DANIEL MCLAREN
HEAVENLY WARMTH

Attractive and efficient.

B
BHaskett
Life changing for my cabin

Primary heat source in my cabin had been a wood stove. I have had 5 Kelvin panels installed for a year now and they have made such a difference for me. They now hold the preferred temp in the cabin (currently 16 F outside, 70 inside!) and I supplement with the stove during the day, when at home. No more waking up in the middle of the night to reload the stove or having to burn wood while I am out of the house. I had some initial issues with the app, customer service was always quick to respond. Electric consumption has been very reasonable. So glad that I made this investment, they really have changed the way that I live during heating season.

S
Steve Woolf

Kelvin

L
LAURINDA STOCKWELL
Trouble setting up unit

I'm having trouble setting up heating unit with my phone. It looks great and is heating but I need to figure out how to regulate temp with app on phone

123