The final thing which is VERY important is the seating of the HVAC air filter. They must be installed for proper air flow – and as you can see below, there will be a directional indication marked on the filter itself. Be sure to install your air filter, whether within an HVAC return ...
were measured using HI 83200 spectrophotometer. Tap water was filtered out with a filter system (size: h = 1000 mm, ø = 300 mm), consisting of magnetic pipes, aquarium sponge, ceramic cylinders, synthetic fibres and granular active carbon. The whole system shared the same wat...