At only 7-1/2″ tall, these quiet yet efficent 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 flexibility. SF-Q Models feature top or side rear gas and electrical connections with an exterior access door for installation and service access. Coach access door not included.