A 1913 house/900sq ft, three level town home doesn't have a HVAC. Roof is quite flat, so a roof top unit has to be considered. Wondering which unit might work best northern client for heating and cooling.
Presently, a Sanyo : Removed link to purchase site. is present on the first and second level.
Please present your suggestions on how to mitigate this stifle feeling of not having fresh circulating air.