Thermosiphon Systems

Chromagen’s Thermosiphon solar heating system delivers high efficiency and low maintenance. The system provides hot water after only a few hours of sunlight and is the eco-friendly answer to a family’s hot water needs. This streamlined system uses natural water circulation and doesn’t require a pump or control unit. It includes a solar collector and a storage tank. All Chromagen systems are supplied complete with connection fittings.

Solar Collector

Highly efficient, coated absorber plate, painted galvanized steel or aluminum case, tempered solar glass and polyurethane insulation. Net area: 1.5 – 3.5 m2.

Solar Storage Tank

Solar storage tanks range from 80-300 liters, which have an internal steel casing over enamel coating. The external shells are polyester coated, galvanized steel, or aluminum. Also included is polyurethane insulation and an electric backup. Specific to closed-loop systems are heat-exchangers.

Steel Stand

Chromagen supplies a variety of stands and racks for flat or inclined roof installations.

Chromagen stands are made of galvanized painted steel to ensure high durability in harsh conditions.

Connecting Kit

All Chromagen systems are supplied with a connecting kit that includes all the required accessories for installation.

Chromagen meets customer requirements and provides appropriate collectors and storage tanks according to size. The following table indicates efficient configurations. There may be variations according to output demands and climate.

Tank Size Collector Model Collector’s Gross Area

120 liter   K or D                   1.65m2 / 2.02 m2

150 liter   D or E                    2.02 m2 / 2.34 m2

200 liter   F or 2x K               2.77 m2 / 2x 1.65 m2

300 liter   2x D or 2x E         2x 2.02 m2 / 2x 2.34 m2

Daily water consumption per individual is 30 – 50 L

Open-loop systems are both simple and economical. They are best suited for warm regions, because they operate with potable water only. Hot water from the collector mixes with the supply water in the storage tank, so a single freeze could destroy the system.

Open-loop systems are not recommended in extreme hard-water areas, since scale buildup in the collectors is likely to hinder their operation.

Closed-loop systems prevent freezing and scale buildup. Heated anti-freeze solution from the collector flows into the tank’s heat-exchanger and then returns to the collector.

An electric backup makes up the energy deficiency during periods of cloudy weather.