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| We now spend an increased
amount of time indoors. The majority of the population now spends
at least 22 of every 24 hours in some kind of artificial climate.
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| Underfloor heating
is far from a new concept, it was first used by the Romans. Their
dwellings were constructed with voids through which air, warmed by
an open fire, would pass, thus heating the structure. |
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| Underfloor heating
is not a new concept in this country either. In the past electric
heating elements were buried within floor screeds. These were heated
over night using 'cheap rate' electricity. The main fault was the
uncontrollability, the building would over heat during the day but
in the evening, when heat is generally required, no further heat was
available. |
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With
today's modern plastic pipes, control systems and high efficiency
boilers the underfloor heating systems of today are extremely
comfortable and controllable.
No longer will unsightly radiators take up room space create
hot and cold spots in the house and circulate dust.
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| Underfloor heating from
the whole floor area of the house gently warms the air above, eliminating
cold spots. The warm air convects from the floor surface losing approximately
2 degrees centigrade at 2.0 meters above the floor, which makes the
system ideal for all ceiling heights. |
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| Independent tests reveal
that the most acceptable indoor climate is one in which the floor
temperature ranges between 19-29°C and the air temperature at
head level ranges between 20 and 24°C. |
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| With radiator or
convector heating systems a vertical temperature gradient is produced;
colder at foot level than at the head. |
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| A modern
indoor climate surely demands a heating system which will match
the required conditions for human thermal comfort with the principal
heating effect being evenly distributed at ground level and
not above head level. |
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| Modern building
techniques including improved levels of insulation, double glazing
etc., have improved the heat loss characteristic. The U-valve (the
measurement for a buildings heat loss) has improved dramatically for
our buildings. |
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Heat source technology has also taken a
leap forward with the introduction of heat pumps, condensing boilers,
solar panels, nigh storage systems etc. It is worth noting that
all these innovations operate at higher levels of efficiency when
linked to a low temperature water distribution system.
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| Underfloor heating has made it possible to reduce
energy consumption by using low water temperatures. These systems,
based on the development of complex and very high quality plastic
pipe, such as the Henco multi-layer pipe, now account for over 60%
of some European heating markets. |
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