Specifically I think a lot about the smells that travel through the duct work between the units.

Duct works goes from package unit to crawlspace to bottom of the floor to the unit.

I’m not trying to rain on anything here but the reality is that measuring Btus delivered to individual units via airflow is by its very nature imprecise - if you want to know why, read on...The size and length of the ductwork is but one factor ( of many) that will yield energy losses while that warm air is being moved to your units.

Also received the Scope of Work: roof repair, exterior paint, replace rear siding, new exterior doors, new gutter, soffit and fascia repair, clean and seal basement, electrical repairs and new breaker 100 amp breaker, refinish hardwood floors, new vinyl kitchen floor, new furnace and duct work - Estimated $9,100 total."

I was able to get an inspection done and from that I know the main work needed is as follow:Under house crawlspace:some foundation pillars or crumbling and need replacement.Major leaks under main bath causing wood beams deterioration.Multiple minor leaks to wood beams in different areas as well.HVAC duct work is leaking at connections.

Looking for someone to review HVAC systems in a multi-family property - specifically duct work design.  

“Because the $20,000 took so much away from their equity to put into another home, they decided not to sell,” she said.Another client of Chaname had difficulty selling his home because would-be buyers balked at paying $16,000 more for a home with HERO-financed air conditioning, duct work, water heater and insulation when similar homes were selling for less.The buyers argued they were paying for the improvements twice – through the higher valuation on the house and assumption of the loan.

Is electrical or duct work running through the area that you want this door added?

If the lines are already et/ duct work is done is typically costs about 3k on the affordable end for labor and install.

It's the visual thing for some people mostly, with such small wall space having it right there in your face isn't ideal. when at all possible, every flip will just get duct work and standard air conditioning.