Horizontal flow systems are most often installed in attics and crawl spaces where space is limited due to a low ceiling and a standard upflow or downflow furnace just won t fit.
Horizontal gas furnace in attic.
The horizontal furnace installation in an attic should be on a service platform large enough to allow for proper clearances on all sides and service access to the front of the furnace see figure 5 clearance table.
Horizontal units can be installed in attics garages or basements either by placing the device on a platform or suspending it from the ceiling.
These offer two possible configurations.
Most furnaces draw cold air in at the bottom and warm air is released out the top.
In certain situations this is not practical and a counterflow or downflow furnace is needed.
Upflow horizontal and downflow horizontal models are also available.
Expect to pay around 1 000 for the equipment along with another 1 000 to install it for most geographic locations.
Counterflow horizontal furnaces can be mounted horizontally where height restrictions are paramount.
For instance in a basement crawl space or attic.
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