Conventional Trench System
With a conventional trench system the natural soil or imported sand are used as the filtering
medium. There are no electrical components with this type of system. A large surface area is
required for the installation of a conventional trench system. A conventional trench system can
be installed either above or below existing grade. This type of system is very common where
space isn’t a problem.
Filter Bed System
A filter bed system is often used when space is limited or when there are poor soil conditions.
Processed sand is brought to the site and placed in the area of the bed. The filter bed is installed
in the processed sand either above or below existing grade.
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ECOFLO Biofilter System
Sphagnum peat is  used as the filtering medium with this type of system. There are no electrical
components. A small surface area is required for the installation, and can be installed either
above or below existing grade. With this type of system the landscaping can be very flexible.
With an ECOFLO biofilter system an 8 year maintenance contract is included in the purchase
price. An annual inspection is conducted every year for seven years and on the eighth year the
peat is replaced at the expense of the owner and the maintenance contract is renewed. This type
of system is environmentally friendly and is becoming very popular. See installation picture on
our web site. Also see www.ecofloontario.com for further information.
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