There is in fact, quite a bit of history behind cooling and heating systems. In fact, cooling can be traced to Roman times when affluent households had aqueducts that ran through the walls of their houses cooling the air. They also had what was called a hypocaust system. This system allowed air heated up 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 integrate hot water for heating. In England, the British installed the first steam heating units into buildings in the 1800s. Air conditioning made its debut in the 20th century.
Forced air systems, radiant systems and gravity systems are the 3 main classifications of central heating systems Air Conditioner Services Harrisburg PA . Boiling water, steam or electrical elements located in walls, in the ceiling or under flooring distribute heat in a radiant system. Thermodynamic properties cause hot air to rise and subsequently, distribute heat to the spaces above with a gravity system. Fans are made use of to blow heated air through a system of ducts in a forced air system. A lot of modern-day buildings and houses use forced air systems.
The most common forced air cooling systems are cooled air and heat pumps. Cooled coils making use of electricity and fundamental principles of refrigeration are vital to refrigerated air systems.
The chilled air is then blown through ducts and vents to the proper space by the use of an electric fan. Heat pumps work in a really different way. They work by pushing hot air within a building to the exterior through electric fans. This process can operate in reverse when the demand for heat arises.
Air conditioner and geothermal central heating units are becoming increasingly preferred. The cool aspect of 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 nine feet into the ground are relied upon. One of the greatest draws of geothermal cooling and heating units is they can be very cost effective since they use zero fossil fuels.
The Seasonal Energy Efficiency Rating, otherwise called 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 makers were producing devices 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 lifespan of HVAC systems across the board.
