Where do I find the Batch Number on my Product?

The Batch Number is found on the product rating label.

This is found on different locations depending on the product.

3 Burner Oak 

Portable BBQ

Rapid Assembly BBQ Range

X Series + A Series BBQ range

European Patio Heaters

The information label is found on the pole 

USA Patio Heaters

The information label is found inside the gas tank chamber door.