A 225mm diameter flue of a similar height will support a fireplace with a dimension no greater than 550mm by 550 mm 22inches by 22 inches.
Gas fire chimney flue regulations.
The distance between the cowl of the flue and the adjacent roof wall structure should be higher than 2 3 mtr.
A flue size providing not less than the equivalent net cross sectional area shall be used.
Minimum clearance distance requirements for the exterior vent termination of a gas fireplace heater 8.
A vertical line drawn along the up roof side of the chimney from the roof surface to the top of the chimney flue opening shall be at least 3 ft in height.
2 no person shall install a flue pipe so.
Your firebox wall needs to be 8 inches thick when lined with fire bricks or 10 inches thick without fire bricks.
The throat of the chimney where the smoke chamber tapers to the size of the flue should be no less than 8 inches above the firebox and should be at least 4 inches deep.
The minimum chimney height recommended for minimum performance of wood burning and multi fuel appliances is 4 5 m from the top of the appliance to the top of the chimney.
Hello if your gas fire is what we call a decorative basket effect gas fire then automatically gas regulations state a 100mm ventilation hole through the wall directly to outside air if the fire is classed as an inset or surface mounted gas fire and as soon as it is rated over 7killowatts of power then you will also need ventilation direct to outside the reason for this is that potentially if it was a cold winters night and you had a gas fire on in a room.
1 no person shall install a gas appliance to any flue unless the flue is suitable and in a proper condition for the safe operation of the appliance.
This is for masonry chimneys.
Cross sectional areas of clay flue linings are shown in tables r1003 14 1 and r1003 14 2 or as provided by the manufacturer or as measured in the field.
This means that the flue outlet needs to be positioned sufficiently high above the roof surface and surrounding buildings to prevent it being affected by wind eddies or downdraughts.
A maximum of 4 bends up to 45ยบ angle is allowed.
For a gas vent or type l vent this height must be 2 ft 0 61m or more.
The height of the chimney shall be measured from the firebox floor to the top of the chimney flue.
As a rule of thumb the chimney fireplace opening should.
Flue gases from the stove must be able to discharge freely without presenting a fire or health hazard whatever the wind conditions.
Be not less than 1 7 th to 1 8 th of the area of the fireplace opening if the flue or chimney height is above 6 metres.
It is important for the fireplace opening to match the chimney size.
The icc though suggests at least 12 inches.
Standard for chimneys fireplaces vents and solid fuel burning appliances nfpa 211 reduces fire hazards by ensuring the safe removal of flue gases the proper installation of solid fuel burning appliances and the correct construction and installation of chimneys fireplaces and venting systems.
