Calpak Solar Water Heater GIGA XS 300/3H

Tile and carpet: Calpak Solar Water Heater GIGA XS 300/3H Direct System (Sloping Roof)

The Calpak GIGA XS 300/3H is the larger model in the GIGA XS thermosyphonic solar water heating range, stepping up from the 200/2 with a 275.1-litre tank and a larger 3.06 m2 collector to serve households of 6 to 7 persons. The bigger collector area (3.06 m2 gross vs 2.13 m2 on the 200/2) delivers 2,040W of output power compared to 1,399W, meaning faster heat-up times and more hot water available during peak evening demand. Like all Calpak Mark 4 systems, it operates by thermosyphon (natural circulation), requiring no pump and no electricity to circulate water between the collector and tank. This model is configured for sloping roof installation.

Technical Specifications:

• System type: Thermosyphonic (natural circulation), direct system, sloping roof mount
• Collector type: Flat plate, high-selective TINOX absorber with copper harp (1 copper tube per 10 cm)
• Collector gross/aperture area: 3.06 m2 / 2.85 m2
• Absorption coefficient: greater than 95%
• Emission coefficient: less than 3.5%
• Collector output: 2,040W (at G=1000 W/m2, Delta-t=10K)
• Collector casing: double-wall electrostatically painted aluminium
• Collector insulation: rock wool, 50 kg/m3 density, 40 mm thickness
• Glass cover: tempered 3.2 mm low-iron glass (greater than 91.5% transmittance)
• Tank volume: 275.1 litres
• Tank material: DC-03 2.5 mm steel with direct enamel corrosion protection (DIN 4753/3)
• Cathodic protection: magnesium bar (DIN 4753/6)
• Tank insulation: injected PU foam without CFC, 43 kg/m3 density, 45 mm thickness
• Anti-frost protection: propylene glycol (Calpak Nox)
• Backup heating: inox flange with 3.5 kW electric immersion heater included
• Dimensions (H x W x L): 1600 x 1500 x 2100 mm
• Mounting: aluminium/galvanised steel support for sloping roof
• Collector certification: Solar KeyMark, SRCC
• Tank certification: enamel quality mark, RoHS (hygienic DHW), CE
• Capacity: approximately 6-7 persons

Sustainability Features:

• Generates hot water from solar radiation, displacing grid electricity or fossil fuel for water heating and directly reducing building operational energy consumption
• Thermosyphonic design operates by natural convection with no circulating pump, eliminating parasitic electricity consumption
• Larger collector area (3.06 m2 vs 2.13 m2 on the 200/2) captures proportionally more solar energy, making it more suitable for larger households without requiring multiple smaller systems
• Supports compliance with Kenya’s Energy (Solar Water Heating) Regulations 2012
• High-selective TINOX absorber achieves greater than 95% solar absorption with less than 3.5% thermal emission
• Tank insulation uses CFC-free polyurethane foam
• Rock wool collector insulation is non-combustible with no ozone depletion or global warming potential
• 3.5 kW electric backup heater avoids the need for a separate conventional water heater