Over the last half century, new technologies have been developed in a variety of industries. However, the HVAC industry seems to have stagnated. In fact, the only changes in the industry seem to be the type of refrigerant used in air conditioners and the development of programmable thermostats. The type of material used to make these appliances have also changed a little bit, but the mode of operation has generally remained the same. Ductless systems are currently among the most popular HVAC system designs in the world.
It is much cheaper to buy and install a heating or cooling system that does not have air ducts. For the system to work efficiently, however, every room in the building must have a heat source. Alternatively, powerful fans must be used to circulate air around the building.
A duct-free cooling system, also known as a split AC system, has two components, the air handler and condenser. The former is installed inside the room on the wall or ceiling while the latter is installed outdoors, either on the roof, outer wall or on the ground. These components are connected by refrigerant tubing and electrical wires.
A split air conditioner cools a room when a compressed refrigerant expands in the evaporator coil. The expanding refrigerant absorbs heat from the surroundings and it's taken back to the condenser for cooling. When the refrigerant is compressed, it releases heat, which is carried away by cool air from the outdoor environment.
There are generally two types of duct free heating; electric heaters and hydronic heaters. The former simply converts electrical energy into heat energy. This happens when electric current runs through a high resistance element.
A hydronic system can be used for both heating and cooling, and it's also duct free. During the hot summer months, chilled water is run through the system, thereby cooling the rooms. In the winter, however, steam or hot water from the boiler is run through the system. Radiators, or heat exchangers, and baseboards extract the heat and radiate it to the surrounding air. The system is controlled by a thermostat and solenoid valves that work together to ensure that heating and cooling is stopped whenever the desired temperature is reached. For instance, when temperatures rise beyond the desired level, the thermostat sends a signal to shut off the valves, thereby preventing cold water from running through the radiator and cooling the room.
Window AC units are also duct free. The system is very similar to a refrigerator. The cooling coils on the window mounted AC unit are exposed to the air inside the room while the condenser is exposed to the outside. The unit is normally mounted on an exterior window.
Whichever type of HVAC system you choose, be sure to hire a licensed contractor to design and install the system. Do not forget to have it serviced on a regular basis. As your system ages, be sure to start budgeting for a replacement. This is because heaters and air conditioners become inefficient, perform poorly, start breaking down more often and consume too much fuel or electrical energy as they get older and older.
It is much cheaper to buy and install a heating or cooling system that does not have air ducts. For the system to work efficiently, however, every room in the building must have a heat source. Alternatively, powerful fans must be used to circulate air around the building.
A duct-free cooling system, also known as a split AC system, has two components, the air handler and condenser. The former is installed inside the room on the wall or ceiling while the latter is installed outdoors, either on the roof, outer wall or on the ground. These components are connected by refrigerant tubing and electrical wires.
A split air conditioner cools a room when a compressed refrigerant expands in the evaporator coil. The expanding refrigerant absorbs heat from the surroundings and it's taken back to the condenser for cooling. When the refrigerant is compressed, it releases heat, which is carried away by cool air from the outdoor environment.
There are generally two types of duct free heating; electric heaters and hydronic heaters. The former simply converts electrical energy into heat energy. This happens when electric current runs through a high resistance element.
A hydronic system can be used for both heating and cooling, and it's also duct free. During the hot summer months, chilled water is run through the system, thereby cooling the rooms. In the winter, however, steam or hot water from the boiler is run through the system. Radiators, or heat exchangers, and baseboards extract the heat and radiate it to the surrounding air. The system is controlled by a thermostat and solenoid valves that work together to ensure that heating and cooling is stopped whenever the desired temperature is reached. For instance, when temperatures rise beyond the desired level, the thermostat sends a signal to shut off the valves, thereby preventing cold water from running through the radiator and cooling the room.
Window AC units are also duct free. The system is very similar to a refrigerator. The cooling coils on the window mounted AC unit are exposed to the air inside the room while the condenser is exposed to the outside. The unit is normally mounted on an exterior window.
Whichever type of HVAC system you choose, be sure to hire a licensed contractor to design and install the system. Do not forget to have it serviced on a regular basis. As your system ages, be sure to start budgeting for a replacement. This is because heaters and air conditioners become inefficient, perform poorly, start breaking down more often and consume too much fuel or electrical energy as they get older and older.
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