It is three screws and two electrical connections.. EASY
Downflow furnaces are typically more efficient than upflow furnaces because they utilize gravity to push warm air downward, which can result in better heat distribution. Upflow furnaces, on the other hand, may require more energy to push air upward, potentially impacting their efficiency. In terms of performance, downflow furnaces are often preferred for basement installations, while upflow furnaces are commonly used in attics or crawl spaces.
upflow, lowboy, downflow, or counterflow, horizontal, and multiposition
An upflow furnace pulls in air from the bottom and releases it out the top, while a downflow furnace does the opposite. Upflow furnaces are typically more efficient and provide better air circulation in homes with basements, while downflow furnaces are better suited for homes without basements. The differences in airflow direction impact heating efficiency by affecting how air is distributed throughout the home.
The upstream Oxygen Sensor is before the Catalytic Conver in the exhaust pipe.
Not always true. There are upflow units, downflow units and horizontal side discharge units.
In an upflow furnace, the return air typically enters through the bottom or sides of the unit. It is drawn in from the living space through return air ducts, which then channel the air back into the furnace for heating. The heated air is then expelled from the top of the furnace into the ductwork, distributing warm air throughout the home. Proper placement of return air vents is essential for efficient airflow and heating comfort.
It is called an upflow furnace. This type of furnace takes in air at the bottom, heats it, and then releases it through the top vents.
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.
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.
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.
C30A is the series of the evap coil. The nominal BTU rating (cooling) for this coil would be 48,000 BTUH (signified by the -047). The "U" indicates upflow, although it can be used in downflow orientation, as well. The "B" would be the case size - 17 1/2" wide.
The SEER rating of a unit is the cooling output in Btu (British thermal unit) during a typical cooling-season divided by the total electric energy input in watt-hours during the same period. The number is for a Rheem RGPN07 CLASSIC SERIES® SUPER QUIET 80 80% A.F.U.E. UPFLOW/HORIZONTAL GAS FURNACE