请教家里Furnace的问题:

The furance is working fine. The blakc pipe is the exhause pipe. You don't want the posion exhause gas in your house right?

How fast the temperature rising is depending on , size of the house, insulation of the house and size of the furance.
 
Wait to see how slow the air condition bring down the temperature!!!

It is ok!. You don't want they are over capacity. Otherwise the temperature swing too much. You wouldn't feel comfortable.
 
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