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Ethical brand ratings and accreditation since 2001

Boilers: Ethical Comparison Ratings Table

Baxi

91

Glow-Worm

91

Heatrae Sadia

91

Main

91

Vaillant

91

Viessmann

91

Grant

86

Alpha

82

Ariston

82

Biasi

82

Ferroli

82

Ideal

82

Johnson & Starley

82

Keston

82

Ravenheat

82

Sime

82

Vokera

82

Intergas

77

Worcester Bosch

46