| FD Fan | ID Fan |
| Forced draft fan | Induced draft fan |
| used basically for providing the required quantity of hot air to the furnace for shine in addition to uniform combustion of fuel | Located betwixt dust collector in addition to chimney |
| FD fan volition furnish required air for the combustion of the fuel inward the furnace | ID fan volition conduct keep the hot flue gases from furnace and volition deliver to chimney. |
| FD fan volition attain the positive describe per unit of measurement area within the organisation i.e. furnace | ID fan volition attain the negative describe per unit of measurement area inward the furnace to take the flue gases |
| Handle mutual depression temperature air | Handle hot gas, thence to a greater extent than ability is required |
| Less maintenance , eat less ability every bit density of mutual depression temperature air is less. | Cope alongside corrosive combustion products in addition to wing ash |
| Is much smaller than ID fan. | Size is largest every bit it exhaust all air (secondary air in addition to primary air) in addition to is laid about to laid about every bit is necessary for prophylactic boiler performance to preclude pressurization of boiler. |
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