Yes it is. It contains the blower.
A "gas furnace" is called a furnace, an "electric furnace" is called an Air Handler
air handler
There are 2 coils. 1 inside the indoor air handler or furnace and 1 outside on your condenser in the yard.
One site for furnace parts is actually furnaceparts.com. Never would have guessed that. You could also try .AllPartsHeating.com.
The power to the thermostat comes from the transformer in the furnace or air handler whichever you have. 1) the power to the furnace/AH is off, 2) the control fuse that protects the transformer is blown, 3) the transformer is defective, 4) the wire between the furnace and the thermostat got cut.
More than likely the air handler or furnace is upflow. In other words air is drawn through the bottom of the unit(the return) which is unconditioned air and blown out through the top of the unit(the supply), which is conditioned air.
Go to the mfr`s website and there should be a link there. Have the model and serial #`s for all pieces (condenser, air handler or furnace and the coil) handy when you do this.
Inside unit that distrubute air threw a handler unit
trane air handler tonnage for model BWV760P100A1
That would depend on whether you have an upflow unit (yes) or a down flow unit (no), there are also horizontal left & right units. Flow is indicated by the the direction that the air travels into and out of the furnace or air handler.
Is there a flame in the furnace. Precisely where is this air coming from and how strong is it?
If you are talking about the forced air furnace that is in the basement or attic you would need to find the amount of air flow from your air handler (CFM) For every 400 CFM you would need about 1 ton of cooling or 12000 BTU For instance my air handler is 1200 CFM therefore i could handle 3 tons easily. This is a rule of thumb but remember that if your air filter is dirty your air flow will be decreased and could cause possible freezing of the cooling coil or evaporator coil.