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Under air means the sq. footage under air conditioning through out the house, under roof means everything covered including for example the garage which isnt air conditioned but is a covered sq. foot area.

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12y ago

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What is a roof batten?

In the UK a roof batten is called a tile batten; this runs across the roof to fix the tiles too; this is 2 by 1 treated timber. Under this at right angles is nailed too the roof a counter batten; this allows an air gap under this again is laid a DPM/ [This means damp proof membrane].


The air pressure acting on the roof of your house comes from?

ALL the air directly above the roof.


Where does the air pressure from the roof of your house come from?

the air pressure acting on the roof of your house comes from the air within a few feet of your rooftop


How do you calculate the size of Air Purifier you need for your house?

To calculate the size of air purifier you need for your house, consider the square footage of the area to be purified. Measure the length and width of the room and multiply these dimensions to get the square footage. Choose an air purifier with a recommended square footage coverage slightly higher than the size of the room for optimal air cleaning efficiency.


What does the word porches mean?

Porches are typically attached to the front or back entrance to a house. Open to the air but with a roof and floor, people can sit under them and be outside but also protected from the elements. They may also be walled in, but many have no walls.


Where does the air pressure acting on your roof of your house come from?

Air pressure is caused by the weight of the air in the atmosphere above pushing down on the roof of your house. The pressure decreases as elevation increases, meaning higher altitudes experience lower air pressure.


Do roof vents make a house colder?

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.


What is the recommended square footage for a room that requires a 9000 BTU air conditioner?

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Is air pressure above the roof less then the air pressure beneath the roof?

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How do you run air conditioning ducts in flat roof house?

a number of options are available: 1) surface mounted under the roof with them either being visible or boxed in 2) fan-assisted and floor fixed 3) fixed and insulated well to exterior of the roof construction 4) externally to the walls Alternatively, build the roof higher and hide the ducts that way


How do you get sq footage in room for air purifier?

To calculate the square footage of a room for an air purifier, measure the length and width of the room in feet and multiply these two numbers together (length × width). This will give you the total square footage. For example, if a room is 12 feet long and 10 feet wide, the square footage would be 120 square feet. Make sure to consider any obstructions that may affect airflow when placing the air purifier.


What is a car snorkel?

it mounts on the outside of the car, usually from the front fender up next to the windshield to the roof. it allows the car to drive through deep water by raising the air intake level to above the roof, rather than under the hood.