Overview
Vaillant is Germany's most prestigious residential boiler brand. Ideal is British-manufactured (Hull) and offers one of the UK market's best value propositions at its price point.
Efficiency
Vaillant ecoTEC Plus: 94%. Ideal Logic Max: 94%. Equal.
Warranty
Vaillant: up to 10 years. Ideal Logic Max: 10 years standard (no accredited installer requirement). Ideal arguably wins on warranty terms — it's standard, not conditional on installer accreditation.
Price
Vaillant is typically £150–£250 more expensive than an equivalent Ideal Logic Max. Ideal wins on price.
Reliability
Vaillant has a stronger long-term reliability record, particularly after 10 years. Ideal's record is good for the price point but doesn't match Vaillant's consistency.
Build quality
Vaillant's German engineering and component quality is generally considered superior to Ideal. This is reflected in the price premium.
Verdict
For long-term primary residence: Vaillant ecoTEC is worth the premium. For rental properties or budget-conscious homeowners: Ideal Logic Max offers genuinely excellent value and is hard to beat at its price point.