Review on Hengs 90110 C1DL Thermal 70000 Vortex by Dustin Keller

I gave this a 3 star rating not because I didn't like it but because it didn't fit my ventilation grille. This is for a 14" x 14" vent cap but too big for myvent. I tried to use it on a vent that had/had no marking so ended up ordering the wrong part even though the vent size is 14" x 14". BTW if it works on your vent it's a solid product but I ended up ordering the full Fantastic Vent 14 x 14 which works great.