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Ductless Mini Split Heat
Pumps and Air Conditioners
What is a ductless
are aware that our comfort comes from the vents in the ceilings or
walls which bring cool air in the summer and warm air in the
winter. This is done by blowing air from a central location
and then distributing it throughout the house.
Blowing conditioned air through a duct system has recently come
under increased scrutiny as recent testing has revealed that
systems can lose 5% to 15% just in leaks and depending on the climate
(sub zero winters and desert homes are the worst), thermal losses (heat loss in
the winter and heat gain in the summer) can add up to 50% loss of
energy from the time it leave the furnace or air conditioning
coil exits the register in your room. This means on the hottest
day your 4 ton unit is really only delivering 2 tons of cooling but consuming 4
tons worth of energy.
Further, the more
extreme the temperature, the more losses that are incurred so when you need it
the most you are getting the least. That's just basic thermodynamic
principles in effect.
Mini splits do not have ducts so there are
no losses due to leaks or thermal losses or gains. Every cent you
spend on your comfort you are getting 100%
of. Why? Systems with ducts have a centrally located large
Freon evaporator coil where a large blower moves warm moist air over the coil
which removes some of the heat from the air. The coil is inside of a sheet
metal box which is then connected to a duct system.
problems with this. No matter how hot it is outside or what demand is on
the system to provide comfort, the unit is running at 100% of it's
capacity. And in most cases, cooling rooms that don't require comfort
because there is no one in them. Mini splits or multi-splits (more than
one evaporator on one condensing unit)
if you only need 2 tons to cool the house, your 4 or 5 ton system is cranking
away using 1.6kw/ton whether it's mild outside or stifling hot.
Mini splits have "inverter technology" which is a fancy way of saying
the compressors are variable speed. In many units, so are the condenser fans which raises
the SEER rating a bit.
wall evaporator/blower is sized to create comfort room by room so you
only turn on the unit where you will be occupying. In my case, I have a 1
ton heat pump mini split in my main living area and one in my master
bedroom. Since I'm not in both places at the same time, only one unit is
running providing cooling in the summer and heat in the winter and while doing
it only consumes 700watts of power, not the 8600watts my roof top mounted 4 ton
Carrier system used to use.
2 ton with Inverter technology. The compressor is variable speed and
only draws the power that is demanded by the sensors on the indoor coil. Nice unit, easy
to work with, quality components throughout, on the higher end as far as price
This is the LG
indoor coil. There are several styles to choose from to match your decor
with LG and this is the smoked glass front unit. This is so
efficient at cooling (originally designed to cool one wing), the client
only uses his central duct system when the outside temp goes above 115F.
This is a 1 ton
Mirage heat pump. This is cooling half of 5 bedroom ranch since he had Thermal Control Membrane in his attic
installed in the attic and a German Attic fan to remove the
solar heat. Mirage is a lower cost, no frills, reliable and quiet
system. I would not hesitate to recommend them and the price is right.
This is the mirage
indoor wall unit. Very quiet and powerful fan projects air 30' and keeps
the house comfortable during expensive on peak hours. The rooftop 5 ton is
shut off and only this is running all day non stop. Some days the
compressor spins faster than others as this brand also has Inverter
This is a
National Cooling Products 2 ton a/c only serving a 800 sq foot guest
house. No need for ducting when the system puts out this much cooling in
My house is super
energy efficient, my load controller is able to maintain a peak use of 1500watts
(yes even in the summer), yet after removing my 4 ton roof unit and switching to
mini splits my APS bill was reduced by 50%
The mini splits were installed the 3rd week in June.
Look at the results and my comfort went up, not down. When you have
9,000btu's cooling your master bedroom you can keep it like an icebox at night
Call today for a free inspection and
accurate quote: 602 867 3176
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