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HEAT PUMP ENERGY
APPLICATION CONSIDERATIONS
SAVINGS
Installation instructions are shipped with all PTAC
units. It is important that air conditioning systems be
Heat pumps save more on operating costs during the
properly sized and installed for each application in
heating cycle than heat/cool models. The table below
order to achieve the desired temperature and humidity
shows that the higher initial cost of purchasing a heat
levels within the space to be conditioned. It is
pump is quickly made up in lower operating costs.
strongly recommended that a professional engineer
Use the map to identify the climate zone's designated
match the PTAC units with the building structure and
number. Reading down the left- -hand column of the
climate.
table, select the cost/kWh rate in this zone that most
The following application considerations are all
closely
approximates
important in choosing the proper PTAC system for
approximated savings and payback period is found at
the building structure.
the intersection of your zone/rate line and the desired
Btuh Cooling Capacity column. Exact savings are
Undersizing
determined by lifestyle, local electrical rates, and
If a PTAC unit is undersized (cooling capacity is less
climatic conditions.
than required load for an application), the unit
will not be able to cool the space down to the desired
GREE HEAT PUMP INITIAL COST VERSUS SAVINGS OVER HEAT/COOL MODELS
temperature during very hot days. The result could be
7,000 BTUH
warm and humid or warm and dry conditioned space.
(2,051 WH)
COOLING
ELECTRIC
Oversizing
ZONE
CAPACITY
COST/kWH
Annual
Savings*
If a PTAC unit is oversized (cooling capacity is
$.06
$ 34.26
greater than required load for the specific application),
I
$.08
$ 45.68
$.10
$ 57.10
the unit will cool the space down to the desired
$.06
$ 57.12
desired temperature too quickly.
II
$.08
$ 76.16
$.10
$ 95.20
The unit will cycle on and off, however,
$.06
$ 58.02
dehumidification only takes place when the unit is
III
$.08
$ 77.36
$.10
$ 96.70
operating. The result of this type of application in a
$.06
$ 82.02
hot and/or humid climate would be a cool, yet
$.08
$109.36
$.10
$136.70
excessively humid, space.
IV
$.12
$164.04
$.14
$191.38
Air Infiltration
$.16
$218.72
$.06
$ 57.36
$.08
$ 76.48
Excessive air infiltration can intensify problems
$.10
$ 95.60
V
associated with undersizing or oversizing a PTAC
$.12
$114.72
$.14
$133.84
unit. This can be the cause of insufficient cooling,
$.06
$ 93.72
dehumidification, or heating. Sources of air
$.08
$124.96
VI
$.10
$156.20
infiltration include vents, gaps around windows and
$.12
$187.44
doors, and improperly sealed floors, ceilings or wall
LEGEND
kWH --- Kilowatt Hour
joints.
*
Computer projections based on full cooling load at 95˚ F (35˚ C). Savings projected for 230 v ratings.
1
Heating load is 5,000 Btuh (1465 WH) at winter design point temperature.
2
Heating load is 10,000 Btuh (2931 WH) at winter design point temperature.
3
Heating load is 15,000 Btuh (4396 WH) at winter design point temperature.
your
local
rate.
The
9,000 BTUH
$60
(2,638 WH)
1
2
COOLING
PREMIUM
CAPACITY
Payback in
Annual
Months
Savings*
21
$ 43.08
16
$ 57.44
13
$ 71.80
13
$ 71.76
9
$ 95.68
8
$119.60
12
$ 72.84
9
$ 97.12
7
$121.40
9
$103.02
7
$137.36
5
$171.70
4
$206.04
4
$240.38
3
$274.72
13
$ 71.94
9
$ 95.92
8
$119.90
6
$143.88
5
$167.86
8
$117.66
6
$156.88
5
$196.10
4
$235.32
Condensate Removal
Gree's GA series has a new condensate (water)
disposal system. The outdoor fan prop has a built in
slinger ring which draws condensate water through a
V
suction port built into the outdoor coil shroud. The
water passes though the suction port and is sprayed
on the warm outdoor coil for evaporation. Thus
providing better disposal of excess condensate and
improving unit operating efficiency.
It is normal and desirable to have some condensate
II
water in the ebase pan to boost operating efficiency.
NOTE: This unit will not always evaporate 100%
of the unit generated condensate and blown in
rain water. If it is necessary to control 100% of
the condensate, the Drain Kit (Part No.: DRAIN-
KIT-4PK) and a building condensate drain
system is recommended.
12,000 BTUH
$75
(3,517 WH)
2
COOLING
PREMIUM
PREMIUM
CAPACITY
Payback in
Annual
Payback in
Months
Savings*
21
$ 58.20
16
$ 77.60
13
$ 97.00
13
$ 96.96
9
$129.28
8
$161.60
12
$ 98.40
9
$131.20
7
$164.00
9
$139.14
7
$185.52
5
$231.90
4
$278.28
4
$324.66
3
$371.04
13
$ 97.26
9
$129.68
8
$162.10
6
$194.52
5
$272.33
8
$159.00
6
$212.00
5
$265.00
4
$318.00
15
5
ZONE V
ZONE IV
ZONE III
ZONE II
ZONE I
15,000 BTUH
$90
(4,396 WH)
3
COOLING
PREMIUM
CAPACITY
Annual
Payback in
Months
Savings*
Months
19
$ 68.34
14
$ 91.12
11
$113.90
11
$113.64
8
$151.52
7
$189.40
11
$115.38
8
$153.84
7
$192.30
8
$163.14
6
$217.52
5
$271.90
4
$326.28
3
$380.66
3
$435.04
11
$113.94
8
$151.92
7
$189.90
6
$227.88
4
$265.86
7
$186.48
5
$248.64
4
$310.80
3
$372.96
A07555
$110
19
14
12
12
9
7
11
9
7
8
6
5
4
3
3
12
9
7
6
5
7
5
4
4
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