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Ductless Air
Conditioning Systems
Split-ductless air conditioning systems are gaining
popularity in Canadian homes. Homeowners with hot water, electric baseboard or
other radiant heating systems not employing air ducts, can enjoy summertime
climate control as well. Ductless systems are also ideally suited to additions,
where extension of existing ducts may be difficult or impractical.
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Ductless split-system air conditioners combine the
zone control of window or through-the-wall units, with the whole-house
cooling capabilities of central systems. Like central systems, they
have two main components, a compressor-condenser unit (outdoors) and an
air-handler containing an evaporator coil and a fan (indoors.) In
milder climates, some systems function as heat pumps, providing primary
heating as well as cooling. The compressor/condenser section is located
outdoors, and the relatively quiet evaporator/fan unit is located within
the indoor space to be cooled. The two halves are linked only by the
coolant tubing.
Note: The
term, "split-system," can also be used to describe central
air-conditioners and heat pumps. If you’re shopping for “ductless”
systems, make sure the dealer understands which system you are looking
for. Ductless split-systems are sometimes referred to as “mini-splits."
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Advantages
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Easier
installation than central systems
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Air ducts
not required
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Zone
control provides balanced comfort and energy savings
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Quieter
than window or thru-wall units
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More secure
than window air conditioners.
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Eliminates
losses common in air ducts
Disadvantages
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Split-system air conditioners cost about $1,500-$2,000 per ton
(12,000 Btu/h) of cooling capacity. This is about 30% more than
central systems, and may cost twice as much as window units of
similar capacity.
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Qualified
contractors may be difficult to located in many smaller centres,
until these systems are in wider usage.
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More Information
Mitsubishi
Electric Canada
Google ductless split
system air conditioners
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