SEDBUK
Seasonal Efficiency of Domestic Boilers in the UK
www.sedbuk.com
OFTEC
Oil Firing Technical Association
www.oftec.org
The Energy Saving Trust
All Grant Vortex Condensing Boilers are endorsed by the EST
www.est.org.uk
The Heating & Hotwater Information Council
Forest Stewardship Council
Grant brochures are printed on paper sourced from renewable forests
www.fsc.org/uk
Sustainable Energy Ireland
Promoting and assisting the development of sustainable energy
www.sei.ie
BSRIA
Independent accredited laboratory for product testing and certification.
www.bsria.co.uk
