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Ethical brand ratings and accreditation since 2001

Ethical Boilers

Baxi

95

Glow-Worm

95

Intergas

95

Main

95

Vaillant

95

Grant

91

Ideal

91

Vokera

91

Heatrae Sadia

86

Ravenheat

86

Sime

86

Ariston

82

Keston

82

Viessmann

82

Alpha

77

Biasi

77

Ferroli

77

Johnson & Starley

77

Worcester Bosch

50