At only 7-1/2 tall, these quiet yet efficient low-profile ducted furnaces feature multi-ported stainless teel burners, sealed forced draft combustion, automatic direct spark ignition and low amp draws. With up to nine duct connection choices, these models offer almost unlimited design -Q/SF-VHQ Models feature top or side rear gas and electrical connections with an exterior access door for installation and service access. Coach access door not -FQ/SF-FVHQ Models are designed for interior serviceability with a front inside gas connection and only a small vent terminal on the coach exterior, permitting installation up to 9 inches from the wall. Since no exterior access door is required, the SF-FQ is aesthetically appealing and a more economical installation choice. VH Models can be installed horizontally and vertically.