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Terminology - Gas Fill Types
Replaces the air between the double glaze unit. Described
as being a “Heavy” gas, it is relatively cheap compared to
ARGON
GAS other gases, non toxic, non reactive, odourless and clear
and most importantly provides increased thermal Argon Gas
performance. Other gases used comprise of Xenon and
Krypton, but are more expensive.
An inert (non reactive), odourless, colourless, non toxic gas
which is approximately 12 times more dense than air.
KRYPTON
GAS Krypton gas can be used to replace the air between a Krypton Gas
double glazed unit to reduce heat transfer. Krypton has a
higher thermal performance level than Argon, therefore a
higher energy efficiency rating. The downside is, Krypton is
more expensive than Argon gas.
An inert (non reactive), odourless, colourless, non toxic gas
which can be used to replace the air between a double
XENON
GAS glazed unit to reduce heat transfer. Xenon has a higher Xenon Gas
thermal performance level than both Argon and Krypton,
however is very expensive and is therefore not as cost
effective as the other gas types.
Terminology - Spacer Bars
Can be made from a variety of materials. Aluminium,
Stainless Steel or Plastic. Aluminum is an excellent
conductor of heat and the aluminum spacer used in most Conventional
standard edge systems produced significant heat loss
through the edge of the glass unit, which then causes areas Spacer
of condensation. Stainless steel was an alternative metal,
but again although less conductive than aluminium still
allowed heat loss to occur.
To reduce heat loss, heating bills, condensation
occurance, double glazed units are now widely fitted with a
warm edge spacer. The spacer is constructed using a low Warm Edge
conductivity material which has very little or no metal
content. This acts as a thermal break therefore eliminating Spacer
condensation on the inner glass panes. This type of spacer
is more expensive than an aluminium one. Alternative warm
edge spacers made from stainless steel are available in the
market as the stainless steel has low conductivity
Issue: 2 (January 2008) 7.3
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