There is in fact, quite a bit of history behind heating and cooling systems. In fact, cooling can be traced to Roman times when wealthy households had aqueducts that ran through the walls of their homes cooling the air. They also had what was referred to as a hypocaust system. This system allowed air warmed by a heater to travel through passageways under floors and into rooms through using pipes. Swedes, all the way back in the 18th century were the first to include hot water for heating. In England, the British installed the first steam heating units into structures in the 1800s. Air conditioning made its debut in the 20th century.
Forced air systems, radiant systems and gravity systems are the three main categories of central heating systems. Hot water, steam or electrical elements situated in walls, in the ceiling or under floors distribute heat in a radiant system. Thermodynamic properties cause hot air to rise and subsequently, disperse heat to the rooms above with a gravity system. Fans are used to blow heated air through a system of ducts in a forced air system. Many modern-day structures and homes use forced air systems.
The most typical forced air cooling systems are cooled air and heat pumps Visit them . Chilled coils utilizing electrical power and fundamental principles of refrigeration are crucial to refrigerated air systems.
The cooled air is then blown through ducts and vents to the proper space by the use of an electric fan. Heat pumps work in an extremely different way. They work by pushing hot air within a structure to the exterior through electric fans. This process can work in reverse when the need for heat arises.
Air conditioning unit and geothermal central heating units are becoming increasingly preferred. The cool thing about geothermal units is that instead of relying on outside air, the geothermal units rely on the temperature level of the earth. A system of tubes that are buried as much as 9 feet into the ground are relied upon. Among the biggest draws of geothermal cooling and heating units is they can be incredibly cost effective since they use absolutely no fossil fuels.
The Seasonal Energy Efficiency Rating, otherwise referred to as SEER, was developed by the Air Conditioning, heating and Refrigeration Institute AHRI. All new central air conditioners are given a SEER rating. The federal government in 1992, began establishing SEER ratings. In 2006, the minimum SEER rating was raised from 10 to 13. As 2009 approached, most ac unit manufacturers were producing units that had SEER ratings of up to 24. This suggested the units were 75 % more efficient that units produced less than 10 years prior. Overall, there has been a dramatic improvement to the efficiencies and life-span of HVAC systems across the board.