He does mention radiant heaters at 1.58 & 3.00. They look like halogen heaters, (example
) and that they do indeed work differently to convection heaters.
This is what the wiki has to say about them:
Rectangular space heater
Honeywell electric infrared radiant heater
See also: Infrared heater and Radiant heating and cooling system
The main advantage of radiant heaters is that the infrared radiation they produce is absorbed directly by clothing and skin, without first heating the air in a space. This makes them suitable for warming people in poorly insulated rooms or outdoors, and allows more distance between people and the heater.
Some of the earliest electric heaters were radiant, consisting of nichrome heating wires held by ceramic or mica insulation at the focal point of a (usually) polished metal reflector. The cost was very low since nothing else, not even a switch, was needed. Later models included a wire guard to prevent accidental contact with the heating wires or the hot ceramic.
The metal reflectors needed to be fairly thick, however; a thin metal housing would get too hot to be safe. Inexpensive mid-20th century heaters were radiant, with the heating wires stretched relatively closely across a larger, thin, metal reflector separated from a thin metal housing. A small fan blew just enough air between the housing and the reflector to cool them, and the main output to the room was radiant heat (not heated air). Stretching the heating wires across a larger area required fewer (expensive) ceramic insulators, and a small fan was cheaper than a larger (or heavier) housing.
Quartz heaters are radiant heaters which are more efficient in the amount and direction of heat, with coiled heating wire inside unsealed quartz tubing. The wires could be thinner (or operate at a higher temperature) than ceramic-supported wires. If the heating elements are at a higher temperature, proportionally more energy is radiated than open-wire heaters.
Halogen heaters have tungsten filaments in sealed quartz envelopes, mounted in front of a metal reflector in a plastic case. They operate at a higher temperature than nichrome-wire heaters but not as high as incandescent light bulbs, radiating primarily in the infrared spectrum. They convert up to 86 percent of their input power to radiant energy, losing the remainder to conductive and convective heat. The halogen cycle reduces darkening of the quartz envelope, extending filament life.
Bolding mine. Source
They're not really the same thing as the panels I've bought, and I rejected them as an option because they're not maintenance-free, (the filaments burn out regularly), are generally not wall-mountable and produce near-infrared radiation rather than far-infrared.
I absolutely understand that a watt is a watt is a watt but...
This is my small bathroom, a little smaller than my den, and the 450 watt panel I installed. (I've tidied up a bit so that faggots don't complain.)
This is the 1800 watt oil-filled radiator I've previously used to heat both, (not at the same time), rather than turn on the central heating.
Both heaters get the bathroom toasty warm but here's my smart meter with the panel on, a 7p per hour increase:
And with the radiator on, a 26p per hour increase:
Hey, come round for a bath next time you're in Blighty and check it out for yourself if you don't believe me, these panels work
and they work well!
Shit happens. The older you get, the more often shit happens. So you have to try not to give a shit even when you do. Because, if you give too many shits, you've created your own shit creek and there's no way out other than swimming through the shit. Oh, and fuck.