(CTA). CT angiography is a type of medical exam that combines a CT scan with an injection of a contrast media to produce pictures of blood vessels and tissues in a part of your body. The contrast is injected through an intravenous (IV) line started in your arm or hand.
The best way to deal with it is just to ask the landlord â in writing â to replace the carpets, pointing out that they were old and stained when you moved in (hopefully this will have been noted on a check in inventory). Common sense says that carpets should really be replaced every 5-10 years.
Here are averages that might help you know how often you should change the air filter at home: 1  Vacation home or single occupant and no pets or allergies: every 6-12 months.  2 Average suburban home without pets: every 90 days. 3  Add a dog or cat: every 60 days.  Add more than one pet or anyone has allergies: 20-45 days.