GordonGecko

House is two zone forced hot air. There are vents on the grade level, but for hear only. The HVAC alleges a second unit is not needed because the cold air from upper levels will cool the grade level. The unit is 13 years old and a 3 ton. The home is approx 2500 sq. ft.

It is two zone heat and one zone c/a. The c/a only send air to the upper levels. No air is sent to the grade level. The grade level is 100% above ground and is level with the garage.

The HVAC "expert" states that the air flow is sufficient from the upper levels to down the stairs to the grade level and that is standard practice in the North East. No returns or central air supplied to vents on grade level. The grade level is about 600 square feet and is on a cement slab all above ground. He claims the 8 x 10 vent from the living room near the stair well is sufficent to let air drop down the stairs to cool not only that section of the living room, but the entire grade level. Are there any FACTS or manuals that state air flow/requirements for square footage regading c/a. Thank you.

Hello, Make you can help me out. I was told by an alleged HVAC "expert" that 90% of split level homes in the North East do not provide air conditioning to the grade level because cold air descends. Is there any truth to that? Thank you, Jason