How to select the correct HRV filter as there are 2 sizes
Be sure to to select the correct HRV filter as there are two sizes.
"Generation 1" is for the older steel box HRV
"Generation 2" is for the newer plastic box HRV
In 2014 HRV introduced the new Plastic box HRV which due to being plastic has a thicker wall thickness.
This meant the HRV filters didn't fit
the supercell generation 2 will fit like a glove into the newer HRV.