This ventilator complies with building regulations part 'J' for England & wales. This ventilator complies with BS 5440 Part 2 2009 "installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70kW net (1st, 2nd and 3rd family gases) Part 2: Specification for installation and maintenance of ventilation for gas appliances".
eBay