Mercury - Vaccum Tube Collector (NON-PRESSURIZED Model)

Venus believe in bringing the benefits of the latest technology to our consumers. Now, in Solar Water Heaters too Venus introduces "Vacuum tube collectors" for the first time in India. Internationally renowned & accepted, this technology is superior to other prevalent systems in performance, reliability & ease of installation. Breakthrough technology that taps the unlimited power of the sun to give you enormous energy savings year after year.

Available Models
100 Litres, 200 Litres
For MY100 - 5 Years
For MY200 - 5 Years


Working of Venus VTC Solar Water Heater

The Venus Vacuum Tube Collector solar water heater is made up of rows of parallel, transparent glass tubes. Each tube consists of a glass outer tube and an inner tube, or absorber, covered with a selective coating that absorbs solar energy well but inhibits radioactive heat loss. The air is withdrawn ("evacuated") from the space between the tubes to form a vacuum, which eliminates conductive and convective heat loss.

The Vacuum tube collector absorbs the heat from the solar radiation & heats up the water stored in the system through the Thermosiphonic effect.

What is Thermosiphonic Effect

A thermosiphon system relies on warm water rising, a phenomenon known as natural convection, to circulate water through the collectors and to the tank. In this type of installation, the tank must be above the collector. As water in the collector heats, it becomes lighter and rises naturally into the tank above. Meanwhile, cooler water in the tank flows down pipes to the bottom of the collector, causing circulation throughout the system. This is called Thermosiphonic Effect. This process continues steadily for a numer of hours till the water stored in the tank is heated up. Very high Temperatures upto 80-85 °C can be had from such a system.

The water heated in this manner is stored overnight in the insulated storage tank and is available for use the next day.


Superior corrosion resistant
Epoxy coated inner tank

Extra thick 5cm PUF insulation for minimum heat loss

Long life corrosion proof
Pre coated outer cladding

Backup electric heating element
for cold rainy days(Optional)

Enamel Painted MS stand - sturdy
and rust resistant

Vacuum Tube Technology with triple layer coating for maximum absorption of solar radiation

5 Years Gurantee on Inner Tank


Heating from infrared rays of solar radiation

Greater absorption area per day

Minimum heat loss from the system due to the vacuum tubes & PUF insulated storage tank

Better performance in winter & on cloudy days. Up to 10ºC higher temperature

Maintance free, easy to clean

Inner tank and outer tank body are made from SS304 superior grade stainless steel to withstand corrosions and to last a life time

Compact size - low height & lesser space required for installation.

Installation Requirements

Unobstructed sunlight on a flat or slopping roof

Shadow-free area

Close to the bathrooms to avoid long piping & heat losses

A water tank at a minimum of 2.5m (7 ft) above roof level

The solar collector tubes facing south.


Besides individual houses, the VTC solar water heater is also ideal for schools, hostels, hotels, dairies, breweries, canteens and industries like automotive, fertilizer, chemical, textiles, pharmaceuticles, etc.

Energy Savings

Venus Solar Water Heaters are designed to offer substantial savings when compared to electric water heaters.

Model (Ltrs./ day) Total cost of a solar water heater Cost of Electric Water Heater * Difference Annual Saving **in Electricity Pay back Period***
KWH (Rs.)
100SVLE Rs.23,500/- Rs.14,500/- Rs.9,000/- 900 units * Rs 5 Rs.4,500 24 Months

* One 100LPD Solar Water Heater replaces 2 Nos. 25 Ltrs. Electric Water Heater

** Calculated at tariff rate of Rs. 4.50 / KWH assuming usage of solar Water Heater for 300 Days / Year. Energy consumed =3 units / day = 900 units / 300 days

*** Pay - back period = Rs.9,000 / Rs.4,500 = 2 years = 24 Months


Description MY100 MY200
Capacity 100 Litres per day 200 Litres per day
No. of Vacuum Tubes 10 Nos 20 Nos
Safety Devices (optional) Thermostat Thermostat
Pipe Connection 3/4" 3/4"
Backup Electric Heating (optional) 2 kw heating element 2 kw heating element
PUF Insulation Thickness 5cm 5cm
Stand Angle 35° - 38° 35° - 38°
Daily Usage upto 4 persons upto 8 persons
Maximum No .of Outlets 2 4
Guarantee* 5 Years 5 Years

Dimensions (In mm)

Model A B C D E F
100Ltrs 1350 1425 1950 480 810 1000
200Ltrs 1350 1425 1950 480 1610 1800

Higher Capacity models are also available (500 LPD, 1000 LPD etc.)

High Pressure Flat Plate models are also available.

*Refer "Terms & Conditions" in User Manual.