Boiler Plus — UK Regs Explained (2026)
Since April 2018, every new gas combi boiler installed in England must meet Boiler Plus — extra energy-saving controls. Here's what that means in practice.
Step-by-step method
1. ErP 92% minimum
All new boilers must be minimum 92% seasonal efficiency (ErP). Most modern condensing boilers meet this easily.
2. Time and temperature control
Programmer AND room thermostat mandatory. Not just an on/off switch.
3. Choose ONE of four extras
For combis: (a) weather compensation, (b) load compensation, (c) smart controls (Nest, Hive, Tado), (d) flue gas heat recovery.
4. Weather compensation
External sensor adjusts boiler flow temp to outside temp. Saves 4–8%. £120 fit.
5. Load compensation
Uses room thermostat to modulate flow temp. Built into most modern controls. Saves 5–10%.
Frequently asked questions
Does Boiler Plus apply in Scotland/Wales?+
Only England. Scotland has its own equivalent under Building Standards. Wales has Part L similar rules.
Cheapest way to comply with Boiler Plus?+
Fit a smart thermostat (Nest, Hive) with the new boiler. £180 add-on, ticks the 'smart controls' box.