Typically, the distance is 12" minimum from a window for a
The exhaust terminations that penetrate through the exterior walls or roof will need to be located 3 feet (914 mm) from windows that are providing the natural ventilation to the dwelling unit.
The vent terminal of a direct-vent appliance with an input of 10,000 Btu per hour (3 kW) or less shall be located at least 6 inches (152 mm) from any air opening into a building, and such an appliance with an input over 10,000 Btu per hour (3 kW) but not over 50,000 Btu per hour (14.7 kW) shall be installed with a 9- ...
The exact distance will depend on the size of your home but, generally, the regulations prevent a boiler flue from being situated within 30-60cm of a window or door. This is to prevent harmful gases from exiting the flue and then re-entering the property through an open door or window.
This standard puts in place a minimum flue height requirement – 3.6 metres – above the floor where the fireplace is to be installed. The end of the flue must not be positioned near openings such as windows or doors to avoid any discharged air from being forced back into the home.
If you have an openable window in your roof and the flue will be within 2300mm either side of it or anywhere below it, then your flue system must rise above the window by 1000mm.
The primary goal is to help you avoid creating unsafe situations that can result in a fire burning your home and possibly causing the loss of life. The National Fire Code dictates that any combustible material (e.g., wood mantel or similar trim) must be at least six inches from the firebox opening.
The flue must be placed at specific distances from windows, doors, and vents to ensure harmful gases are safely expelled. For instance, the flue needs to be at least 300mm away from any window that can open or any air vent. It's also mandated to be at least 300mm from a door.
Each vent shall terminate not less than 10 feet (3048 mm) from, or not less than 3 feet (914 mm) above, an openable window, door, opening, air intake, or vent shaft, or not less than 3 feet (914 mm) in every direction from a lot line, alley and street excepted.
Efficiency and Air Flow
Placing the heat vents beneath the windows is actually best for efficiency and proper airflow.
Direct Vent Gas Fireplace Venting Requirements
One rigid flue goes inside the other, but they have an axis, angles, and elbows. The inner flue must be smaller than the outer one to allow enough space through which clean air can reach the firebox. The inner flue carries the exhaust.
Although there are different types and styles of gas fireplaces some of which burn more safely and efficiently than others, the general rule is to NOT allow your fireplace to burn through the night. For safety, all fireplaces should be monitored properly to prevent fatal accidents.
The size of the vent would needs to be a minimum of 550mm2 per kW over and above 5kW. For example a very large stove with a rating of 9kW would need a vent of (4 x 550m2 = 2200mm2) that is (sq root of 2200) a vent with the dimension of 46.9mm by 46.9mm or roughly 4.7 cms square.
The venting system shall terminate at least 4 feet (1.2 m) below, 4 feet (1.2 m) horizontally from or, 1 foot (0.31 m) above any door, window or gravity air inlet into any building.
A fan should always be sited in the furthest window or wall from the main source of air replacement to avoid short-circuiting the airflow. It should be located as high as possible in the window or wall nearest to smells or steam, but not directly above eye-level grills or cooker hoods.
Locate the exhaust terminal at least 3 feet from any door or window and away from the fresh air intake of a high-efficiency furnace, water heater, or any other HVAC intake. It should also be located away from air conditioning or heat pump condensing units installed outside. Avoid terminating the duct at the roof.
No vent terminal shall be located directly beneath any door, window, or other ventilating opening of a building or of another building, nor shall any such vent terminal be within 10 feet horizontally of such opening unless it is at least 2 feet above the top of such opening.
Liquid fuel normal vent pipes shall terminate outside of buildings in a nonhazardous location at a point not less than 2 feet (609.6 mm) measured vertically or horizontally from any building opening and not less than 2 feet (609.6 mm) nor more than 12 feet (3657.6 mm) above the fill pipe terminal.
An open vent terminal from a drainage system shall not be located directly beneath any door, openable window, or other air intake opening of the building or of an adjacent building, and any such vent terminal shall not be within 10 feet (3048 mm) horizontally of such an opening unless it is 3 feet (914 mm) or more ...
(1) Exterior metal chimneys over eighteen inches in diameter, for equipment of any operating temperature, shall have a clearance of at least four inches, and those eighteen inches or less in diameter shall have a clearance of at least two inches from a building wall of any combustible construction.
This rule means that your chimney's shortest side needs to be at least 3 feet above the roof penetration, and its top has to be 2 feet higher than any part of the building that's within 10 feet. There a number of reasons behind this rule.
Boiler flue separation distances
The positioning of the flue needs to be (a minimum of): 300 mm away from an opening window or air vent. 25 mm below guttering, drain pipes or soil pipes. 300 mm above the ground, roof or balcony level.
We recommend leaving at least 45cm between the top of your fire and electrical equipment, such as a TV. Practice the same caution for all flammable objects, with at least 60cm in all directions from your fireplace, especially if the flame is open, as with our wall-mounted Alden range.
2111.11 Hearth Extension Dimensions. Hearth extensions shall extend not less than 16 inches (406 mm) in front of, and not less than 8 inches (203 mm) beyond, each side of the fireplace opening.
The specific minimum distance required can vary depending on the heat emission of the fireplace, as well as the type of materials used in the construction of the furniture and the surrounding area. Generally, a clearance of at least 36 inches is advised to allow for proper airflow and reduce the risk of overheating.