A Decade of Boiler Innovation
The combi boiler of 2025 is dramatically different from 2015's models. Here's what's changed.
Efficiency Improvements
Seasonal efficiency (SEDBUK) ratings have improved from around 89% to 94%+ for the best models. This translates to real bill savings.
Smart Connectivity
Modern boilers connect via Wi-Fi to smartphone apps. Worcester Bosch's Wave app, Vaillant's myVAILLANT, and Baxi's Baxi Hub allow remote control and diagnostic monitoring.
Quieter Operation
Acoustic insulation and improved fan design have made modern boilers 30–50% quieter than older models.
Modulation
Newer boilers modulate output from 20% to 100% of capacity, running at lower power when demand is low. This dramatically reduces short-cycling and saves fuel.
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