I have a Bryant 350MAV and would like to have an ECM blower motor installed to allow for continuous slow speed air recirculation. The unit is 12 years old and runs like a top. I've installed a fireplace insert in my home and the air handle return in that room would recirculate the heat on a slow speed recirculation. The installed motor blows too hard for a continuous run. Is there an ECM motor and control that can be installed in place of the OEM blower motor. Anybody ever heard of such a thing?