Yes, gnats can come out of dirty air vents. Gnats can actually come from anywhere. They are very pesky creatures.
heater fan broken.
House vents are typically located both inside and outside the house. Inside the house, vents are usually found in ceilings, walls, or floors to allow air to circulate. Outside the house, vents are often located on the roof or walls to allow for proper ventilation.
The heater may not be on - but the fan still blows air through the vents when they're open !
House air vents should be cleaned at least every 1-2 years to maintain good indoor air quality.
the middle vents only supply air from the ac unit using a separate in dash fan. the floor and defrost vents come only from the heater
Yes vents can be in the floor instead of the wall.
something has to be blocking the vents.
Roof vents are used to ventilate humid air out of the attic area of the house to increase the air conditioners ability to cool air down or the heaters ability to heat the air. Roof vents can also suck humid air into the attic and eventually rot the roof over time if the air flow is off balance though.
leaking ducts allowing air into system.
Weak air flow from the vents in your house could be caused by a clogged air filter, blocked ducts, a malfunctioning blower motor, or issues with the HVAC system. Regular maintenance and cleaning can help improve air flow.
Air vents on the outside wall of a house are typically placed to allow fresh air to enter and circulate inside the building. This helps to improve air quality, remove moisture, and prevent mold growth. Additionally, exterior vents are often located near appliances or equipment that require ventilation, such as HVAC systems or dryers.