If you’ve been shopping for electric heaters, you’ve probably seen the term “Lot 20 Compliant” — but what does it actually mean for you?
In simple terms, Lot 20 is part of the UK and EU Ecodesign Directive, designed to make electric heating more energy-efficient and environmentally friendly. Introduced in 2018, it ensures that all electric space heaters sold in the UK and EU meet minimum efficiency standards.
Even after Brexit, the UK continues to enforce Lot 20 — because it plays a key role in the government’s pledge to cut greenhouse gas emissions by 68% by 2030.
What Products Are Covered by Lot 20?
If you’re buying any of the following electric heating products, Lot 20 applies:
-
Direct-acting heaters, including IR panel heaters, electric radiators and portable heaters.
-
Underfloor heating
-
Radiant heaters
-
Electric and gas fires
Any unit above 250W must meet strict energy efficiency rules to be legally sold in the UK.
How Lot 20 Works
Lot 20 doesn’t just set a basic efficiency target — it pushes manufacturers to build in smart, energy-saving features such as:
-
Digital programmers – schedule your heating around your lifestyle.
-
Open window detection – cuts off heating when a sudden drop in temperature is detected.
-
Accurate thermostats – maintain a steady temperature without wasting power.
-
Adaptive start control – learns how quickly your room heats up for perfect timing.
The minimum efficiency rating for heaters above 250W is 30%, but many modern heaters (including infrared models) go far beyond that.
Why It Matters to You
Lot 20 compliance means:
-
Lower energy bills thanks to smarter heating control.
-
Better performance with less environmental impact.
-
No hidden costs — many compliant heaters require little to no maintenance.
-
Protection from poor-quality, inefficient products that waste energy and money.
For infrared heaters in particular, Lot 20 compliance is easy to achieve because they’re naturally efficient and can integrate all the required smart features.
The Bottom Line
You might not notice Lot 20 compliance in day-to-day use — and that’s the point. It’s about better heating, lower running costs, and reduced carbon emissions without sacrificing comfort. When buying your next heater, always check for Lot 20 compliance to make sure you’re getting the most efficient and future-proof option available.
