Duda Solar
Solar Water Collectors
Φ58mm x 1800mm Vacuum Tubes
Available in 15, 20, 25 & 30 tube manifolds. Manifolds can be connected in series to make larger heaters.
Weather Resistant, Closed Loop System
For use in active solar systems with separated water storage tank
OG-100 SRCC Certified - Eligibile for the Government Tax Rebate
 
For information on how active solar water heater systems work, please read our article on active solar water heaters 
For information on installation, please download the Duda Solar Water Heater Installation Manual (pdf).
 
Parts Included:
  Solar collector manifold
  Corresponding Φ58 x 1800mm Long Vacuum Tubes with copper heat pipes & Aluminum fins (pre-installed into tubes)
  Spare Vacuum tubes (for breakage insurance during freight transit, extras may be kept by customer as spares)
  Roof mounting gear with 37°/45° Inclined stand for Flat Roof / Ground installation or Slope Roof Stand
  Tube holders for connecting the bottom of the tubes to the bottom rack of the frame.
  Thermal Conduction Paste for elimination of any air pockets between the heat pipe and manifold connection point
  Hex Bolts & Nuts / Hardware
   
Duda Solar SRCC Certifications
15 Tube Solar Rating 
20 Tube Solar Rating 
25 Tube Solar Rating 
30 Tube Solar Rating 
 
Manufacturer's Warranty Period:
All of our solar products come with a manufacturer's warranty. A manufacturer warranty covers materials defective due to the manufacturing process. If a manufacturing defect is discovered during the manufacturer's warranty period, the item may be returned  to Duda Energy for repair or a replacement. Only materials found defective due to manufacturing will be replaced under the warranty. The warranty does not cover natural phenomenons such as corrosion. 
The manufacturer's warranty period does not designate the expected lifetime for a material, unit or device. It only applies a limited time period in which defects due to manufacturing may be eligible for a claim. 
Solar Collector Warranty Period: 3 Years
  Stainless Steel Tank Warranty Period: 2 Years
  Electrical Heating Element Warranty Period: 1 Year
  Controller Warranty Period: 1 Year
 
  Certifications
  SRCC Certified - Eligibile for Government 30% Tax Rebate
  ISO 9001:2000 Standard - Reg: CN00208Q10492R0M
  ISO 14001:2004 Standard - Reg: CN-00208E20080R0M
  ROHS Report - Reg: SHR0808053030F001C
  SRCC Certificate:
  
  Some of the many uses:
    
  
  Heat domestic home water
  Solar Radiant home heating 
  Radiant floor heating
  Pool & jacuzzi heating (We also have unpressurized collectors specifically for this)
   
  Winter Resistant
Use of non-toxic propylene glycol antifreeze makes the closed loop solar water heater system winter/freeze resistant when used in conjunction with a water storage tank with a built-in heat exchanger. 
The heat pipes in tubular solar collectors contain a proprietory fluid for rapid heat transfer to the manifold. The Duda Solar standard solar collector heat pipes offer general resistance to freezing in cold weather.  It is acceptable for the collector to experience intermediate drops below the rated low temperature since the manifold is insulated well and the tubes are protected by a vacuum. However, climates which regularly experience extreme cold weather may require heat pipes designed for the extreme temperatures based on the chart below.
  
    Duda Solar Heat Pipe Freeze Resistance Chart | 
    
  
    Heat Pipe Type  | 
    Low Temperature Rating  | 
    High Temperature Rating  | 
    Heat Pipe Thickness  | 
    Condenser Cover?  | 
  
  
    Standard   | 
    -10°C (14°F)  | 
    230°C (446°F)  | 
    0.6mm  | 
    No  | 
  
  
    FP - Freeze Protection  | 
    -25°C (-13°F)  | 
    250°C (482°F)  | 
    0.7mm  | 
    
  
    SFP - Super Freeze Protection  | 
    -50°C (-58°F)  | 
    0.8mm  | 
    Yes  | 
  
 
  
    Duda Solar Collector Specifications  | 
    
  
    # of Tubes  | 
    15  | 
    20  | 
    25  | 
    30  | 
  
  
    Gross Area  | 
    2.342 m2 (25.21 ft2)  | 
    3.083 m2 (33.19 ft2)  | 
    3.824 m2 (41.16 ft2)  | 
    4.565 m2 (49.14 ft2)  | 
  
  
    Net Aperture Area  | 
    1.417 m2 (15.25ft2)  | 
    1.889 m2 (20.33 ft2)  | 
    2.361 m2 (25.41 ft2)  | 
    2.833 m2 (30.49 ft2)  | 
  
  
    Absorber Area  | 
    1.219 m2 (13.12ft2)  | 
    1.625 m2 (17.49 ft2)  | 
    2.032 m2 (21.87 ft2)  | 
    2.438 m2 (26.24 ft2)  | 
  
  
    Dry Weight  | 
    48 kg (106 lb)  | 
    64 kg (141 lb)  | 
    80 kg (176 lb)  | 
    96 kg (211.2 lb)  | 
  
  
    Fluid Capacity  | 
    0.9 Liters (0.2 Gallons)  | 
    1.2 Liters (0.3 Gallons)  | 
    1.5 Liters (0.4 Gallons)  | 
    1.7 Liters (0.5 Gallons)  | 
  
 
  
    Duda Solar Collector Parameters  | 
    
  
    Test Pressure  | 
    1200 Kpa (175 psi)  | 
  
  
    Max Operating Pressure  | 
    600 Kpa (87 psi)  | 
  
  
    Header Connections  | 
    3/4" Copper Pipe  | 
  
  
    Maximum Flow Rate  | 
    5.25 gpm  | 
  
  
    Maximum Working Temperature  | 
    229°C (444°F)  | 
  
  
    Heat Pipe Start-up Temperature  | 
    <30°C (86°F)  | 
  
  
    Heat Pipe Material  | 
    TU1 Copper  | 
  
  
    Heat Pipe Diameter  | 
    1mm with 14mm Condenser  | 
  
  
  
    Tube Lifespan  | 
    ~70% Performance @ 15 Years  | 
  
  
  
    Fins Around Heat Pipe  | 
    1.6m (5.25ft) Single Aluminum Fin  | 
  
  
    Manifold Pipe Material  | 
    TU2 Copper φ35mm x 0.8mm (φ1.4" x 0.3")  | 
  
  
    Manifold Casing Material  | 
    6063 Aluminum Alloy 1.8mm (0.07")  | 
  
  
    Insulation Type  | 
    High Density Rock Wool 93 Kg/m3 (5.8 lb/ft3)  | 
  
  
    Thickness of Insulation  | 
    45mm (1.77")  | 
  
  
    Frame Material  | 
    Black Powder Coated or Argentine  | 
  
  
    Sealing Materials  | 
    EPDM  | 
  
 
  
    Duda Solar Vacuum Tube Parameters  | 
    
  
    Solar Vacuum Glass Tube Material  | 
    High Boron Silicon 3.3 Glass  | 
  
  
    Outer Tube OD  | 
    φ 58mm (φ 2.28")  | 
  
  
    Inner Tube OD  | 
    φ 47mm (φ 1.85")  | 
  
  
    Tube Length  | 
    1800mm (70.9")  | 
  
  
    Coating of Absorber Glass Tube  | 
    Three Target Cu/SS-ALN(H)/SS-ALN(L)/ALN  | 
  
  
    Structure  | 
    All glass double tube co-axial structure  | 
  
  
    Method for Coating  | 
    Sediment Method, 3 target magnetron sputtering plating  | 
  
  
    Specific Absorption  | 
    as=0.93~0.96 (AM1.5)  | 
  
  
    Emission Ratio  | 
    Εh=0.04~0.06 (80°C±5°C) (176°F±9°F)  | 
  
  
    Vacuum Rating  | 
    P<5.0 x 10-3 Pa  | 
  
  
    Hailstone Resistance  | 
    Up to φ25 (φ1")  | 
  
  
    Average Heat Loss Coefficient  | 
    ULT0.4~0.6W/m2.°C  |