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.



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Chris B (News)