There should be only one blower to move the air. The unit will have a coil for cooling and a heat exchanger.
Forced air heating
This means there is a blower attached to the system that forces the heat into the home.
It could have any size heating furnace, the two are unrelated except for the size blower used in the furnace to support the 3 ton cooling system. But the fact remains you can get a 3 ton blower in 50,000 btu furnace, a 100,00 btu furnace and anything in between.
increase the efficiency of the system
With central air the furnace fan must be running to provide the air to the living space. If the furnace fan is not running then you get no air out of the ducts and the A-coil (the part of the ac system that is in your furnace duct) will freeze and shut down the compressor (the part that is outside).
Central heating systems usually heat on a different system from the hot water heater, unless the main heater is a combination furnace/hot water heater. If this is the case, it could be because the outflow of hot water is greater than the ability of the furnace to heat the water.
Unfortunately, a problem with the central heating system sometimes does not get noticed until the house is already cold. Regular maintenance of heating systems is important to identify any repairs that need to be made before they develop into serious problems. There are three components to a central heating system: the furnace itself, which contains the heating element, a motor and a fan; the ducts which convey the heated air through the house and return the cold air to the furnace; and the filters which clean the air as it passes through the system. Here is how to troubleshoot a central heating system. 1) If the temperature in the house noticeably decreases, the first step is to check the filter. The filter is responsible for cleaning the air, and if it is dirty, it will make the furnace work harder to move the air, while at the same time decreasing the temperature. Remove the filter; if it is dirty, replace it. The air temperature should noticeably increase pretty rapidly. 2) Make sure the furnace is turned off before accomplishing this step. If the filter is clean, try checking the blower. The blower is what actually moves the heated air through the house. If the blower is broken, the furnace will not work. Most blowers are run by a belt which is driven by a motor. The belt fraying or breaking is a common repair that needs to be made. The motor can also break, which definitely needs replacing if that happens. 3) Next, check the thermostat, circuit breakers and fuses for any problems. Use a multimeter to test all three electrical components for errors. If the multimeter gives a reading above zero, the component in question is broken and needs to be replaced. The error can be much simpler, of course. A circuit breaker could be tripped or a fuse could be blown. 4) The belt could also be too tight, in which the case the operation of the blower is making the furnace overheat. If the central heating system cycles on and off repeatedly for short durations, this is likely the culprit. Adjust the belt so that it is loose, but not too loose.
It depends on the duct system. Each furnace has a recommended outlet temperature. To get the proper airflow for that temperature the duct system has to be properly designed. If properly designed the speed would typically be low.
There are 2 separate divisions of the nervous system. These 2 divisions are the central nervous system and the peripheral nervous system.
The condenssor is outside of the house, the blower unit is somewhere in the house,and call the whole system, "central air".
A blower motor is a motor which is used in your car, or home to force air from the outside in and either heat it up or cool it down via your Central Air Conditioner or heating system
2 weeks ago I replaced my 26 year old gas furnace/central ac unit. Both were working properly up until the end.