I rent a townhouse in a large development. The HVAC unit was replaced approx. 6 months ago in all the townhouses. Recently I noticed decreased airflow so I went to check the filter. I looked around the unit and couldn't find the filter anywhere. I had to take the access panel off the front. The air filter was sitting loose in the bottom of the unit. It was sucked up against the air intake of the blower motor. A hole was worn in the filter from the motor shaft. Initially I though that it was clogged and got sucked loose from it's brackets. Upon closer inspection I noticed there were NO brackets. It was just placed in the unit sitting free. I called maintenance and they acme to the house and looked at the installation. He said that was how it is intalled and there was nothing they could do. I'm thinking to myself that a high school metal shop student could fabricate slides for the filter. I wrote a letter of complaint and took pictures for the rental office. I have heard no response yet. Does this meet code? Shouldn't the filter be secured over the entire air intake of the HVAC housing? Any advice how I could persuade the rental office to fix this right? I live in Maryland if it matters..