Solar Water Heating(SWH) System

Each time you feel the warmth of the sunrays on the rooftop or courtyard, it reminds you of a natural energy source is always there for the hot water and space heating needs at your home. It is available in an unlimited amount and at free of cost!


You may be aware that it is possible to convert sunlight into electricity using the solar panels, but it may feel shocking & interesting for you that the same can generate heat energy for solar water heating and space heating. Solar water heating is a cost efficient technology in use to produce heat energy in abundance for your domestic or commercial needs. It will save money on utility bills which will ultimately pay for the SWH installation cost.


Selecting the best solar water heating system may not be easy without proper knowledge; it is recommended to seek for a specialist’s help, who has experience of installing the SWHs and providing quick consultation on them. There are two widely used varieties of solar water heating systems available for your choice.  A Passive solar water heating system does not require any pump induced energy but, the natural gravitation force to help the water circulate from collectors to the tank. It has less number of mechanical parts, reduced maintenance/servicing cost and low expenses for initial setup. Whereas an Active solar water heater is a more expensive, yet energy efficient type having pumps and controls to aid in the process of water circulation.

Both of these solar water heating systems include two key components – a solar collector and a water storage tank. The solar collectors capture the sunrays before converting them into heat energy. They can be of the following types:

  • Flat plate collector:  well insulated and glazed collectors following a flat-plate assembly method
  • Evacuated-tube collector: the transparent and energy efficient glass tubes arranged in rows with little scope for heat loss from them.
  • Integral collector or Batch collector: a system made of single or multiple tanks or tubes kept in an insulated box for long term water storage. It does not fit cold climates due to the risk of freezing pipes in heavy cold condition.

While looking to pick up the best SWH for your home, you need to review the solar water heating systems from all angles. It is the geographical region, climate condition and your home’s position that will be crucial in deciding which solar heating system will be perfect for you.

The active solar heating systems can make up for your extra expenses with lowered utility bills per month. They can be of the following types:

  • An indirect circulation system uses a heat exchanger to transfer heat into the water storage tank from a nonfreezing fluid circulating in it. This kind of system suits the very cold regions where the temperature may fall drastically to cause the pipes freeze at any time.
  • A direct circulation system uses pumps to let the water circulate through the collectors and then flow back into the storage tank. They function well in mild climates where there is no risk of temperature going below the freezing point.

Passive solar heating systems are normally more reliable, durable, less costly to install, but they are not as efficient as the active ones.  They can again be of two types:

  • A thermo-syphon passive system makes the hot water rise from the collector to the crest of a tank without the use of a pump. In this case the collector is fitted underneath the storage tank to make use of the natural gravitational force.
  • An Integral collector-storage passive system assembles hot water in storage tanks or tubes that are placed inside an insulated box and fits the best in mild weather conditions.

An apparent problem in using solar energy is the lack of control on the weather. If you reside in a dark and cold area with only a few sunny days experienced in a year or there is no south facing roof in your residence then the solar water heating may not prove to be as effective as it should.

If all these details can’t eliminate your doubts or confusion, don’t feel worried at all! Solar water heating systems have been in use for a long time but are not extensively used everywhere, therefore asking for advice and guidance from 123 Zero Energy would be a worthy step to take before looking to invest in one.

To ask your query regarding solar water heating systems or their prices, 123 Zero Energy can be visited online or contacted over phone at 1-800-317-9054!

Solar Air Collectors:Know Their Ultimate Advantages and Applications

Solar air heating systems can inexpensively supply a major part of heat demand in a home or building using passive solar in combination with a solar powered PV fan. They draw in fresh air from outside and circulate it through a labyrinth of black aluminum solar air heating panels with a special selective coating to absorb maximum heat possible. Through a PV fan, this heated air is driven into the dwelling for transferring energy without further loss. This mechanism works best for the summer, spring and fall months while bringing an increase in internal temperature from 20-40 C (70-90 F)! In colder climate conditions such as Northern America, the outside temperature can go down to -30-40 F and in such situations the basic solar air collectors like SAH30 won’t be able to provide enough heat. However, the advanced models like SAH34 are designed to efficiently draw in air from the building or its basement and making it pass over the solar air heating panel to reheat and get blown into the living area. This is the smart technique which enables the solar air collectors to deliver enough of heat energy even in -40 F.

Today’s solar air heaters undoubtedly aim at minimizing the space heating costs and supplying warm clean heating by utilizing a renewable source of energy as much as possible.

The core part of any active solar air heating system consists of the solar air collectors, which capture and absorb most of the solar energy before converting it into heat. Presently, solar air collectors are not so widely used: On an international front, there is a limited number of manufacturers engaged in the production of solar air collector systems. The air collectors are all digitally thermostatically controlled so you can expect the fan to automatically turn off when a specific temperature is reached.

Placing the solar air collectors on a straight surface offering the best angle between the solar heating panel and the sun will yield better results in winter, spring, and autumn. The place must be in that direction where there is the highest scope for sun exposure with little obstructions.

Solar air collectors function in any sunlight condition, serving as a renewable supplement to any existing heating system at the daytime by saving around 50% of the energy cost.


They are the perfect choice for cottages, workshops or garages, trailers, even hunting shacks or ice fishing.


The main advantage of solar air collectors is that they are available in easy to install DIY kits; saving the homeowner the installation as well as investment cost. Another useful thing is that they don’t require wiring or electrical permits. There is completely no operating cost as the solar fan is run by a solar PV module on the collector. And the best part of all is the fan speed increases automatically with an increase in the sun’s intensity. There is little risk of solar air collectors overheating in the summer season as the users can make minor adjustments in the temperature setting to prevent the system from turning on. The digital thermostat is also powered by the solar panel in order to avoid the use of batteries or AC power.

123 Zero Energy offers two selective models of Solar Air collectors - the SAH30 and SAH34 which use passive heating to deliver amazing results. Each of them is competitively priced and performs excellently up to 1 kW per solar heating panel. To be sure of getting delivered with the most cost-efficient and energy efficient solar air collectors available in the world so far, call 123 Zero Energy at 1-800-317-9054!