Hi there. One of your previous discussions on this model a custom asked if it could be vented out the back. I would like to order this but my job site has short ceilings 87.75” and I intend for it to be a stand alone unit ( no cabinet above). A CSR indicated previously that the blower could be vented out the back for an additional $50. When I contacted Houzz customer service as requested they said I could not request this. So what is the process for getting g this modification? Would it be suitable for short ceilings? And if I can’t get the modification but the application works is it modifiable on site by an licensed HVAC professional? Thanks for your help.