Chimney Air Flow Calculator

The height of the hot air column from ground floor to outlet air duct above roof is approximately 8 m.

Chimney air flow calculator.

The velocity of air and flue gas in a smaller furnace should not exceed 2 m s. Volume flow is usually measured in cubic feet per minute cfm. A cross sectional area of chimney m 2 q volume of flue gases at chimney temperature m 3 s v velocity m s. Equations displayed for easy reference.

Includes 53 different calculations. Concept of air velocity can be used in air conditioning heating and ventilating work. A chimney that is too long may cause the air to cool before it exits reducing effective draft and worse dripping of exhaust materials onto food. The chimney is the work horse of the smoker drawing smoke and hot air from the firebox into the cook chamber.

Floor to the outlet above the roof. Pressure loss ounces in 2 p the horsepower required to drive air through a pipe equals the volume of air in cubic feet per second multiplied by the pressure in pounds per square foot and this product divided by 550. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. A chimney that is too short may produce insufficient draft drawing of air.

Online calculator to quickly determine air flow rate through an orifice. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Enter square footage calculate or enter the square footage of the attic or area to be vented.

By multiplying air velocity by the cross section area of a duct you can determine the air volume flowing past a point in the duct per unit of time. Chimney draft chart pdf chimney area. Required chimney area can be calculated as. Chimney size enter the diameter of your chimney pipe to find out how long it should be.

A q v 3 where. Design velocities of larger furnaces should not exceed 10 m s. The air intakes are critical factors to providing the fire with enough air. T i inside chimney temperature k t o outside air temperature k chimney draft chart.

The throat is the connection point between the firebox and the cook chamber. The outside temperature is 10 oc and the inside temperature is 20 oc. Calculate the air flow caused by natural draft in a normal family house with two floors. A duct of diameter 0 2 m goes from 1.