I have a Englander 28-3500 and need help. I currently have a heat/air pump with a propane furnace backup. I want this wood furnace to heat my house but if the temperature of the house drops below a certain temperature (if we are away for a day etc.) I would like my heat/air pump to kick in. How do I hook the englander's thermostat to the my existing furnace fan so that my heat/air pump will not turn on (until needed) and I do not have to manually turn my furnace's fan on via the house thermostat and have it run constantly. Any help appreciated. Thank you. The furnaces existing blower will not blow it sufficiently to heat my house so I really need the furnace fan to help.