Okay so on my buildings I have a 30 year old building.Next to the door is a 2 pane slider.One of the panes broke from someone attempting to get in to one of the units.From my car audio business days I worked with plexiglass.Much tougher than glass to break and was clear and easy to clean.Was thinking of buying a sheet for 20 bucks and putting in the front as one piece replacing the slider.The slider is next to the front door so it does not need escape access or air flow just to let sun light in the front room.Opinions??

Dirty filters cause probably 25-50% of hvac issues in rental homes... it restricts the airflow, causing equipment to fail or not work correctly.

As long as there is air flow, it will still work.

It could be a water issue or an air flow issue where the building is too tight.

This means making sure all rooms receive heat and airflow on a consistent basis.

Important to keep insulation loose and warm inside air flowing around pipes.

Due to the HERS requirement of spray foaming the basement along the rim/band joist, air flow was nearly non existent and with some moisture in the basement due to the old stone foundation, it became an issue.  

I also lose space.I'm really scratching my head on this one and could really use the Restricting air flow via dampners wreaks havoc on an FAU, I dont use registers with dampners at all.

Educate tenants to have some airflow in the home especially while cooking.

Another reason I'm glad I have smart thermostats is that I've had 2 guests this summer change the fan from Auto to On, wanting constant airflow I assume, despite ceiling fans in every room.