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Ethical brand ratings and accreditation since 2001

Boilers: Ethical Comparison Ratings Table

Baxi

91
No Accreditation

Glow-Worm

91
No Accreditation

Heatrae Sadia

91
No Accreditation

Main

91
No Accreditation

Vaillant

91
No Accreditation

Viessmann

91
No Accreditation

Grant

86
No Accreditation

Alpha

82
No Accreditation

Ariston

82
No Accreditation

Biasi

82
No Accreditation

Ferroli

82
No Accreditation

Ideal

82
No Accreditation

Johnson & Starley

82
No Accreditation

Keston

82
No Accreditation

Ravenheat

82
No Accreditation

Sime

82
No Accreditation

Vokera

82
No Accreditation

Intergas

77
No Accreditation

Worcester Bosch

46
No Accreditation