Update Bulletin No. 421
www.dulley.com
Jim Dulley
T
hank you for
your interest
in writing to me about
2012 mini-split ductless
air-conditioning system to
be used instead of or with
central systems or win-
dow units. Mini-split
ductless systems are one
of the few methods to cool an entire house
that does not have a central ducting
system. They can also be used in
addition to existing central ducted
air-conditioning to cool
problem rooms or to
zone cool the house for
energy savings.
A mini-split duct-
less system is basically a small scale central
air-conditioner with an outdoor compressor/
CARRIER CORP., PO Box 4808, Syracuse, NY 13221 - (800) 227-7437 www.carrier.com
Cool only units
model - “QNC” series — wall mount* cooling - 8,500 to 22,600 ** SEER - 13.0
model - “QAC” series — ceiling mount cooling - 18,000 to 58,500 SEER - 13.0
model - “QKC” series — in-ceiling cooling - 18,300 to 34.400 SEER - 13.0
Heat pump units
model - “QNQ” series — wall mountcooling/heating - 8,700 to 23,000 / 9,000 to 21,000 ** SEER/HSPF - 13.0 /7.7
model - “QAQ” series — ceiling mount cooling/heating - 19,000 to 58,000 / 17,000 to 57,500 SEER/HSPF - 13.0/ 7.7
model - “QKQ” series — in-ceiling cooling/heating - 18,000 to 34,400 / 17,600 to 34,000 SEER/HSPF - 13.0/7.7
multi-zone systems - There are dual-, tri- and quad-zone systems available.
features - The wireless remote has an automatic shift of fan speed, sleep mode — slowly raises temperature at night, 24-hour timer,
time of day, sensor dry and automatic operation, high sensitive IC-thermostat and 3-minute delay circuit to prevent a fuse from
blowing. The air handlers are quiet and equipped with four-way deflectors to direct air in any angle. There is an automatic restart
after power failure. There is electric backup heat on several models and auto change over on the heat pump units. The indoor and
outdoor units can be placed up to 49 feet apart. Bryant (owned by the same company as Carrier) offers almost identical models.
EMI, 5780 Success Dr., Rome, NY 13440 - (800) 228-9364 www.enviromaster.com
Cool only units
model - “KWC” — wall mount cooling - 9,000 to 36,000 SEER - 13.0
model - “FHP” — floor mount cooling - 9,000 to 48,000 SEER - 13.0
model - “CHP” — ceiling mount cooling - 9,000 to 36,000 SEER - 13.0
model - “CAH” series — in-ceiling cooling - 9,000 to 48,000 SEER - 13.0
model - “TBH” — drop-in ceiling cooling - 9,000 to 24,000 SEER - 13.0
Heat pump units
model - “KWH” — wall mount cooling/heating - 9,000 to 36,000 / 9,000 to 35,000 SEER/HSPF - 13.0 / 7.7
model - “VCH” — in-wall cooling/heating - 18,000 to 38,000 / 17,500 to 28,000 SEER/HSPF - 13.0 / 7.7
multi-zone systems - There are dual-, tri- and quad-zone systems available.
features - There are power induced fresh air options. The “WHP” series has unit mounted digital controls. Options include a digital
remote control, condensate pump and electric heat options to 5 kW. The units have a nice profile featuring a perforated intake grille
and manually adjustable discharge vanes. The “CAH” series has motorized air distribution vanes for sweep or set directions, fresh
air and condensate pump, branch knockouts for secondary outlets and electric heat. The “CHP” also has fresh air knockout
sections and optional electric heat to 10kW. It is a ceiling mounted evaporator for applications where fully exposed or partially
recessed cabinetry can be used. For partially recessed mounting, these units easily adapt to standard T-bar, drop ceiling openings.
It is designed for applications where the unit may be concealed in soffits or other structural spaces with only the intake and
discharge grilles exposed. The aluminum supply air louvers are dual adjustable for air flow direction, to provide air flow throws to
suit any installation. The “TBH” unit has an attractive intake/discharge grille that replaces any two by four foot ceiling panel and only
electric wiring and refrigerant tubing is needed between the ceiling unit and the outside condensing unit. Sea coast coated coil
options are a good choice for corrosive environments. Models are designed for 100-foot maximum tubing runs. Hydronic heat, hot
water and steam is available on several models.
Selected Manufacturers of Ductless Mini-Split Air-Conditioning/Heat Pump Systems
* This is the capacity in Btuh. Btuh means Btu’s of cooling or heating output per hour.
** SEER is the cooling efficiency rating for an air conditioner or heat pump. HSPF is the heating efficiency rating for a heat pump in the heating mode.
compressors
and condensers
in outdoor unit
Typical system requires
only a 3- inch hole cut
through the outside wall.
only 6” to
8” deep
wall-mounted
cooling/fan unit
ceiling-mounted
cooling/fan unit
small refrigerant
lines and wiring
run to several
indoor units
Friedrich Ductless
Split System
Mitsubishi
two-zone
Outdoor Unit
condenser unit and an indoor cooling/blower
unit. Instead of the indoor cooling coils being
in a central duct/blower system in a basement,
utility room, or attic, a small cooler unit is
located on a wall or ceiling in a room. Placing
two or three of them throughout a house can
cool the entire house. Some models are also
available with heat pumps and/or electric
resistance heat for winter use too.
On the following pages, I have
listed the highest
quality mini-split
ductless systems
available. The ones
which use inverter
compressors are most ef-
ficient. The Sanyo models
don’t have the highest effi-
ciency ratings, but their heat-
ing and cooling output is
variable. This improves
comfort and can make them ef-
fectively as efficient or more than the
models with higher SEER and HSPF rat-
ings. The companies in Japan make
the most advanced models because
these system are common there.
(26 pages)
(20 pages)
(22 pages)
(35 pages)
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