Insufficient cold air returns cause air stagnancy, stuffiness and cold spots. Multi-story houses with floor heating vents require cold air returns placed high to draw air up, while they function better near in the floors in smaller houses.
I have a pre-fab home with a forced air furnace in the basement and one cold air return in the dining room. A previous owner finished the basement and added a cold air return in the basement (about half the size of the upstairs one). I notice that most of the cold air from upstairs simply flows down the stairs (which are only 10 ft away from the cold air duct).
Q&A / Cold Air Return Heating Design | New Construction text: Tim Carter. DEAR TIM: We live in a Cape Cod style house that was built in the early 1960's. The problem is that in the summer the basement is cold, the main floor is comfortable, and the upstairs is hot.
Cold-Air Returns - Be More Comfortable. Static Pressure In Supply & Return Ducts Is Important. Existing Hot Houses - Check Return Air Duct. If you live in a home that has rooms that are either too hot in hot weather or are cold in cold weather you could have a return-air duct issue. Return air ducts are necessary for just about every room.
The answer may be your return air grills- also known as “cold air returns”. These are the vents that are usually on the wall and they do not have a control mechanism to open or shut their flow. Their purpose is to allow air to return to the furnace to be heated or cooled. It is an air inlet.
A cold-air return is a vent that sucks cold air into a furnace so that it can be heated and brought back to a room through a furnace register. These vents are seen in many types of furnace systems, although there are alternatives, such as drawing air from the outside or from the area around the furnace.
For the system to work, you have to re-circulate the air back to the furnace. That is why you need a cold air return (Image 1). Expert Note: If you had no return air in your room, you would create a positive pressure. That would then reduce the flow of conditioned air to that space. Nail a piece of sheet metal onto the back of a stud cavity.
Cold air return vents work by allowing cool air to be suctioned into a furnace or heating/air conditioning system. The cool air is then heated or cooled, depending on the system setting, and forced back out into the home or building. Some cold air returns draw air from outside and some from inside the structure.
The Difference Between Air Supply and Return Ducts and Registers. Your home actually has two different kinds of air vents: supply registers and return registers. To understand why, you need to know a little bit about how HVAC units work. Your unit’s ducts push heated or cooled air into a room—that’s the “supply” part.
Add New Cold Air Returns. Although it's easier to modify cold air return ducts, adding new cold air returns so there’s one in every room is the best way to achieve balanced airflow in your home. This is not a task suitable for the average homeowner, and will likely require a qualified HVAC technician to complete the job. Make sure to get a ...