Yes. Brett Singer, a scientist with the Indoor Environmental Group at Berkeley Lab explains how pollutants get into the air from cooking and his group's research to clear the way for a rating system for range hoods.
Calcium carbonate builds up at the bottom of the water tank and reflects the heat back against the glass lining. This reduces the efficiency of the heater and shortens its life.
A 2x4 frame skinned with Luan plywood, simple corner and shoe molding is captured on a helmet cam, 2x4 cam, speed square cam, drill cam, brad nailer cam and panning yard cam edited to high speed process over an acoustic blues tune.