Chimney Air Flow Calculator

Equations displayed for easy reference.

Chimney air flow calculator.

We ve detected that you re using adblocking software or services. A duct of diameter 0 2 m goes from 1. To use the calculator enter your air velocity or volume air flow and duct area type select your units click calculate air flow and your converted velocity and volume units will be shown. Design velocities of larger furnaces should not exceed 10 m s.

Online calculator to quickly determine air flow rate through an orifice. 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. A cross sectional area of chimney m 2 q volume of flue gases at chimney temperature m 3 s v velocity m s. The throat is the connection point between the firebox and the cook chamber.

Includes 53 different calculations. A q v 3 where. 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. The air intakes are critical factors to providing the fire with enough air.

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. Volume flow is usually measured in cubic feet per minute cfm. The chimney is the work horse of the smoker drawing smoke and hot air from the firebox into the cook chamber. The outside temperature is 10 oc and the inside temperature is 20 oc.

Chimney draft chart pdf chimney area. Chimney size enter the diameter of your chimney pipe to find out how long it should be. Calculate the air flow caused by natural draft in a normal family house with two floors. Enter square footage calculate or enter the square footage of the attic or area to be vented.

The velocity of air and flue gas in a smaller furnace should not exceed 2 m s. 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. Search cui devices full line of dc fans. 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.

Floor to the outlet above the roof. The height of the hot air column from ground floor to outlet air duct above roof is approximately 8 m. 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. Required chimney area can be calculated as.