On 03/10/2019 17:23, Chris B wrote:
On 03/10/2019 17:11, Andy Burns wrote:
Brian Gaff wrote:

How are you judging efficiency?

the same way that the EU defines it for "lot 20" compliant heaters,
they should just call it a rating, rather than claiming it's a
percentage efficiency.
Having just read this I quite agree its got nothing to do with
efficiency as any sane engineer would define it.

https://www.electricradiatorsdirect....ctric-heating/


To comply with the new Lot 20 regulations, all local space heaters will
have to meet a minimum efficiency rating expressed as a percentage. This
differs between specific heater categories, however, most electric
heaters will begin with a base rating of 30% to account for losses in
Europes power generation infrastructure.

Efficiency is determined by how many energy saving features are
incorporated into the product;

A fixed electric local space heater will gain a 7% bonus to its rating
if it comes equipped with electronic room temperature controls and a
weekly programmer.

Heaters that include an open window detection feature; distance control
option, such as Wi-Fi compatibility; or an adaptive start system, will
then be brought over the 38% efficiency line. If they feature two or
more of these features, theyll be offering above and beyond the
requirements set out by the new legislation.


So add "features" which will either break or will cease to be supported
within the next 5 years.

User then tosses the old heater into the WEEE mountain, and then buys a
new one.

The gadgets on the first heater save bugger all energy/CO2 compared to
an average human being with an ounce of common sense, and any savings
are wiped out when the replacement is purchased.