Overview
Rooftop Air Handling Unit (RTU) is a type of air handler specifically engineered for installation on the roof of a building. These self-contained systems are designed to condition and circulate air in commercial or industrial spaces, handling heating, cooling, ventilation, and filtration-just like indoor air handlers-but with one major difference: they operate entirely outdoors.
Rooftop units are commonly used in malls, offices, factories, hospitals, and large open spaces, where saving indoor floor area is essential.
Parameter
Cooling, water volume, water resistance
Cooling conditions: Inlet air dry bulb temperature 27℃, wet bulb temperature 19.5℃, inlet water temperature 7℃, outlet water temperature 12℃
|
Model |
Two-row pipe |
Four-row pipe |
six-row pipe |
eight-row pipe |
||||||||
|
cooling(KW |
Water volume(m³/h) |
Water resistance (KPa) |
cooling(KW) |
Water volume (m h) |
Water resistance (KPa) |
cooling(kW) |
Water volume (m³/h) |
Water resistance (KPa) |
cooling (KW |
Water volume (m³/h) |
Water resistance (KPa) |
|
|
ZK-05 |
18.8 |
3.23 |
10.1 |
29.4 |
5.01 |
9.76 |
37.8 |
6.49 |
16.99 |
45.7 |
7.85 |
10.44 |
|
ZK-10 |
34.7 |
5.89 |
10.5 |
58.6 |
10.35 |
11.65 |
75.4 |
12.96 |
10.08 |
91.2 |
15.70 |
12.82 |
|
ZK-15 |
53.4 |
9.16 |
9.8 |
87.9 |
15.08 |
7.21 |
113.1 |
19.5 |
12.11 |
136.8 |
23.52 |
15.12 |
|
ZK-20 |
70.6 |
12.14 |
9.8 |
117.3 |
20.16 |
8.25 |
150.8 |
26.21 |
14.07 |
182.4 |
31.96 |
17.48 |
|
ZK-25 |
92.9 |
15.83 |
11.6 |
146.1 |
25.12 |
10.24 |
188.1 |
33.90 |
11.77 |
227.5 |
39.11 |
14.76 |
|
ZK-30 |
113.6 |
19.2 |
11.8 |
175.2 |
30.12 |
11.16 |
225.6 |
38.90 |
13.10 |
273.4 |
47.00 |
16.28 |
|
ZK-40 |
144.4 |
24.82 |
12.4 |
232.8 |
40.03 |
12.93 |
300.2 |
51.61 |
15.73 |
362.2 |
62.27 |
19.20 |
|
ZK-50 |
180.5 |
30.61 |
10.4 |
292.3 |
50.25 |
7.47 |
375.3 |
64.52 |
17.00 |
435.80 |
74.93 |
15.70 |
|
ZK-60 |
216.6 |
37.24 |
9.4 |
349.2 |
60.04 |
7.47 |
450.3 |
77.42 |
17.00 |
544.80 |
93.67 |
15.70 |
|
ZK-80 |
287.2 |
49.1 |
9.1 |
464.6 |
79.88 |
8.5 |
598.4 |
102.89 |
19.5 |
724.8 |
124.62 |
17.9 |
|
ZK-100 |
357.0 |
61.38 |
9.5 |
578.2 |
99.41 |
8.5 |
746.5 |
128.35 |
19.5 |
904.2 |
155.46 |
17.9 |
|
ZK-120 |
428.4 |
73.65 |
9.5 |
693.6 |
118.91 |
8.5 |
895.2 |
153.91 |
19.5 |
1084.8 |
186.51 |
17.9 |
|
ZK-160 |
591.2 |
101.65 |
11.2 |
921.6 |
158.48 |
10.3 |
1190.4 |
204.67 |
20.1 |
1443.2 |
255.93 |
32.4 |
|
ZK-200 |
740.1 |
127.25 |
12.8 |
1152.2 |
199.3 |
13.1 |
1488.1 |
255.86 |
26.4 |
1804.3 |
310.22 |
42.4 |
Note: The performance parameters of the unit at a headwind speed of 2.5m/s
Cooling condition correction factor
Correction Factor K1 for Cooling Capacity and Water Flow under Different Inlet Air and Water Temperatures
|
air temperature |
Water temperature℃ |
|||||
|
Wet bulb Temperature |
Dry bulb Temperature |
5/10 |
6/11 |
7/12 |
8/13 |
9/14 |
|
17 |
19-27 |
0.83 |
0.76 |
0.67 |
0.62 |
0.57 |
|
18 |
20-30 |
0.94 |
1.85 |
0.76 |
0.68 |
0.58 |
|
19 |
21-31 |
1.07 |
0.97 |
0.88 |
0.79 |
0.71 |
|
19.5 |
21-33 |
1.15 |
1.06 |
1.00 |
0.86 |
0.78 |
|
20 |
22-33 |
1.20 |
1.10 |
1.03 |
0.90 |
0.81 |
|
21 |
23-36 |
1.34 |
1.24 |
1.14 |
1.03 |
0.93 |
|
22 |
24-39 |
1.48 |
1.38 |
1.28 |
1.18 |
1.07 |
|
23 |
25-42 |
1.63 |
1.53 |
1.43 |
1.32 |
1.22 |
|
24 |
26-45 |
1.79 |
1.69 |
1.59 |
1.47 |
1.36 |
|
25 |
27-48 |
1.75 |
1.64 |
1.53 |
||
|
26 |
28-48 |
1.92 |
1.81 |
1.70 |
||
|
27 |
29-48 |
2.09 |
1.98 |
1.87 |
||
|
28 |
30-50 |
2.26 |
2.16 |
2.05 |
||
|
29 |
31-52 |
2.40 |
2.32 |
2.2 |
||
Correction Factor K3 for Cooling Capacity and Water Flow under Different Inlet Air and Water Temperatures
|
Headwind speed |
2.0 |
2.3 |
2.5 |
2.7 |
3.0 |
3.3 |
3.5 |
|
coefficient |
0.81 |
0.92 |
1.0 |
1.07 |
1.17 |
1.26 |
1.32 |
Correction Factor K2 for Water Resistance under Different Inlet Air and Water Temperatures
|
air temperature |
Water temperature℃ |
|||||
|
Wet bulb Temperature |
Dry bulb Temperature |
5/10 |
6/11 |
7/12 |
8/13 |
9/14 |
|
18 |
20-30 |
0.90 |
0.74 |
0.60 |
0.49 |
0.36 |
|
19 |
21-31 |
1.13 |
0.95 |
0.77 |
0.65 |
0.54 |
|
19.5 |
21-33 |
1.35 |
1.15 |
1.00 |
0.78 |
0.63 |
|
20 |
22-33 |
1.41 |
1.20 |
1.05 |
0.82 |
0.67 |
|
21 |
23-36 |
1.72 |
1.49 |
1.27 |
1.06 |
0.86 |
|
22 |
24-39 |
2.08 |
1.82 |
1.57 |
1.34 |
1.12 |
|
23 |
25-42 |
2.48 |
2.20 |
1.93 |
1.66 |
1.14 |
|
24 |
26-45 |
2.95 |
2.62 |
2.33 |
2.03 |
1.76 |
|
25 |
27-48 |
2.78 |
2.46 |
2.16 |
||
|
26 |
28-48 |
3.30 |
2.94 |
2.60 |
||
|
27 |
29-48 |
3.80 |
3.50 |
3.12 |
||
|
28 |
30-50 |
4.14 |
4.10 |
3.70 |
||
|
29 |
31-52 |
4.14 |
4.10 |
3.70 |
||
Correction Factor K4 for Water Resistance under Different Inlet Air and Water Temperatures
|
Headwind speed |
2.0 |
2.3 |
2.5 |
2.7 |
3.0 |
3.3 |
3.5 |
|
coefficient |
0.9 |
0.96 |
1.0 |
1.04 |
1.1 |
1.16 |
1.2 |
Ps:1.The above correction factors are determined based on the average values of various units. For small units (05~15), multiply by 0.95; for large units (50-200), multiply by 1.08.
2.The above correction factors are approximate values and are for reference only.
Correction under different wind speeds, inlet air temperature, and water temperature conditions:
Actual cooling capacity = Cooling capacity from Table 1 × K1 × K3
Actual water flow = Water flow from Table 1 × K1 × K3
Actual water resistance = Water resistance from Table 1 × K2 × K4
Example: Selecting YG-20 air conditioner, the cooling coil face wind speed is 2.5 m/s. According to Table 1, the cooling capacity is 150.8 kW, water flow is 26.21 m³/h, and water resistance is 14.07 kPa. Determine the actual cooling capacity, water flow, and water resistance when the inlet air dry-bulb temperature is 27°C, wet-bulb temperature is 21°C, inlet water temperature is 7°C, and outlet water temperature is 12°C.
Solution: From Table K1, the correction factor K1 = 1.14. From Table K2, the correction factor K2 = 1.27.
Therefore:
Actual cooling capacity (Q) = Standard condition cooling capacity × K1 = 150.8 × 1.14 = 171.91 kW
Actual water flow (V) = Standard condition water flow × K1 = 26.21 × 1.14 = 29.88 m³/h
Actual water resistance (P) = Standard condition water resistance × K2 = 14.07 × 1.27 = 17.87 kPa
Heating, water volume, water resistance
Heating conditions: air inlet temperature 15℃, water inlet temperature 60℃
|
Model |
Two-row pipe |
four-row pipe |
six-row pipe |
eight-row pipe |
||||||||
|
Heating(KW) |
Water volume (m/h) |
Water resistance (KPa) |
Heating (KW |
Water volume (mh) |
Water resistance (KPa) |
Heating (KW) |
Water volume (m³h) |
Water resistance (KPa) |
Heating(KW) |
Water volume m/h) |
Water resistance (KPa) |
|
|
ZK-05 |
34.1 |
3.23 |
10.1 |
50.6 |
5.01 |
9.76 |
59.2 |
6.49 |
16.99 |
77.1 |
7.85 |
10.44 |
|
ZK-10 |
67.1 |
5.89 |
10.5 |
99.8 |
10.35 |
11.65 |
124.8 |
12.96 |
10.08 |
151.0 |
15.70 |
12.82 |
|
ZK-15 |
101.8 |
9.16 |
9.8 |
149.7 |
15.08 |
7.21 |
173.5 |
19.5 |
12.11 |
205.1 |
23.52 |
15.12 |
|
ZK-20 |
135.6 |
12.14 |
9.8 |
199.0 |
20.16 |
8.25 |
248.8 |
26.21 |
14.07 |
289.3 |
31.96 |
17.48 |
|
ZK-25 |
168.7 |
15.83 |
11.6 |
249.5 |
25.12 |
10.24 |
311.2 |
33.90 |
11.77 |
353.3 |
39.11 |
14.76 |
|
ZK-30 |
202.6 |
19.2 |
11.8 |
304.5 |
30.12 |
11.16 |
380.9 |
38.90 |
13.10 |
448.3 |
47.00 |
16.28 |
|
ZK-40 |
270.4 |
24.82 |
12.4 |
399.2 |
40.03 |
12.93 |
480.8 |
51.61 |
15.73 |
592.4 |
62.27 |
19.20 |
|
ZK-50 |
337.3 |
30.61 |
10.4 |
512.3 |
50.25 |
7.47 |
556.8 |
64.52 |
17.00 |
641.8 |
74.93 |
15.70 |
|
ZK-60 |
404.7 |
37.24 |
9.4 |
609.4 |
60.04 |
7.47 |
581.2 |
77.42 |
17.00 |
766.8 |
93.67 |
15.70 |
|
ZK-80 |
539.5 |
49.1 |
9.1 |
796.0 |
79.88 |
8.5 |
386.2 |
102.89 |
19.5 |
1006.0 |
124.62 |
17.9 |
|
ZK-100 |
674.5 |
61.38 |
9.5 |
985.1 |
99.41 |
8.5 |
1127.6 |
128.35 |
19.5 |
1272.3 |
155.46 |
17.9 |
|
ZK-120 |
808.9 |
73.65 |
9.5 |
1185.9 |
118.91 |
8.5 |
1362.5 |
153.91 |
19.5 |
1533.6 |
186.51 |
17.9 |
|
ZK-160 |
1077.8 |
101.65 |
11.2 |
1576.0 |
158.48 |
10.3 |
1688.4 |
204.67 |
20.1 |
2083.2 |
255.93 |
32.4 |
|
ZK-200 |
1346.2 |
127.25 |
12.8 |
1970.8 |
199.3 |
13.1 |
2032.7 |
255.86 |
26.4 |
2606.2 |
310.22 |
42.4 |
Note: 1. The unit's performance reference at a headwind speed of 2.5m/s
2. The coil is a dual-purpose coil for hot and cold applications
Key Features of Rooftop HVAC Units
◆All-in-One Construction
Heating, cooling, air filtration, and ventilation are integrated into a single rooftop package.
◆Weatherproof Enclosure
Designed to resist rain, UV, corrosion, and wind, using galvanized steel or powder-coated aluminum casings.
◆Flexible Configurations
Available in direct expansion (DX), chilled water, or heat pump types with customizable airflow directions.
◆Easy Maintenance Access
Side service panels or top-access hatches simplify filter changes, coil cleaning, and motor service.
◆Advanced Controls
Compatible with BMS (Building Management System) and energy-saving sensors (CO₂, temperature, pressure).
Applications of Rooftop HVAC Units
- Commercial Buildings:Widely used in office buildings, shopping malls, restaurants, and retail stores to provide efficient heating and cooling across large spaces.
- Industrial Facilities:Installed in factories, warehouses, and other industrial settings to maintain comfortable and controlled indoor environments, crucial for both employee comfort and product integrity.
- Healthcare Facilities:Used in hospitals, clinics, and medical offices to ensure a clean, temperature-controlled environment that meets the stringent air quality standards required for patient care.
- Educational Institutions:Employed in schools, colleges, and universities to provide consistent and reliable climate control, ensuring a comfortable learning environment.
- Data Centers:Installed in data centers and server rooms to maintain precise temperature and humidity levels, protecting sensitive electronic equipment from heat and moisture.
- Multi-Tenant Buildings:Used in apartment complexes and mixed-use buildings to provide centralized climate control that can be easily managed and maintained.
FAQ
Q: Can I request early shipment?
Q: Are there any special requirements for OEM purchases?
Q: What are your advantages compared to your competitors?
2. We offer reliable quality control.
3.We have competitive prices.
4.We provide efficient service (26*7 hours).
5.We offer one-stop services.
Q: Can you provide drawings and technical data?
Q: Are your products exported?
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