Solar Air-to-Water Heating
Water heating for domestic use, building heating, industrial
processes, even air conditioning is one of the largest energy
expenses for buildings and facilities. Domestic water heaters
supply kitchens, showers, laundries, rest rooms, sinks in
janitor closets, etc. Buildings often use hot water to heat
cold areas and to reheat air that is "deep cooled"
for air conditioning. Industrial processes heat water for
thousands of industrial activities.
Water coming from wells or city water mains normally enters
a building at 40 to 60 degrees F. Traditional domestic water
heaters will boost water temperatures at sinks to 105 to 120
degrees F. Larger buildings often heat water and circulate
water at 140 degrees F before cooling it at faucets to 120
Industrial processes operate at a variety of temperatures,
but usually supply "make up" water that is lost
from the process, from cold well or city water, which must
be heated to the operating temperature.
With our solar thermal systems, building operators can solar
preheat the water coming into their buildings or processes.
This reduces the energy use by the traditional water heater
For large water-heating systems, we design a system that
best fits the size of the building and the water heating loads.
We design and install an air-to-water heat exchanger and water
storage tank to fit the spaces available and the daily and
seasonal loads. If your systems have a smaller commercial
water tank, we can provide a single-unit water preheat and
storage tank to handle the heating and storage needs.
We also design systems that take advantage of available summer
solar heat capacity, when reduced space heating demands free
up solar heating capacity for additional water-heating loads.
PDF of American Solar's
Hot Water schematic
Air handler with heat exchanger
Low cost solar hot water heating
With air-to-water heat exchangers, we use the solar heat
hitting the exterior surfaces of your building to heat the building's