Baxi's Platinum combi sits at the top of the Baxi residential range, sitting above the already-premium 800. Here's how they compare and whether the Platinum deserves its premium.
Efficiency
Baxi Platinum: up to 89.3% net efficiency (approximately 80% gross). Baxi 800: up to 94.9% ErP. Counter-intuitively, the 800 is actually more efficient by modern measurement standards — different efficiency measurement standards make comparison tricky. Both are A-rated.
Warranty
Platinum: 10 years with registration. 800: 10 years with registration. Equal.
Features
Platinum: quieter operation, premium fascia. 800: more recent design with better diagnostics.
Price
Platinum: typically £100–£150 more than the 800. This reflects the premium casing and older platform.
Our verdict
The Baxi 800 is actually the better choice for most homeowners. It has better ErP efficiency figures, comparable warranty, and more current technology. The Platinum's premium is primarily for the aesthetic design. Unless you specifically prefer the Platinum's appearance, save the money and choose the 800.