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Blower room ventilation calculation

A simple help for blower room ventilation design. It will help you verify the correctness of the designed fans for forced ventilation and the minimum size of the ventilation grilles for the supply of fresh air for your blowers.

Blower type
Number of blowers in operation

Values for one unit

Suction volume flow Q₁		m³/h
Pipeline length in the machine room l		m
Pipe diameter behind the blower d		m
External suction	yes no
Maximum required blower room temperature T_{s max}		°C
Ambient air temperature T_a		°C
Air temperature at the outlet of the blower T₂		°C
Installed power of electric motor P₁		kW
Blower shaft power P₂		kW
Electric motor efficiency E

Blower type Fill in the sample values

Resulting values for 1 unit

Engine power dissipation P_m	kW	Required amount of fan cooling air Q_v	m³/h
Power radiated by the blower P_d	kW	Required amount of air supplied to engine room with suction grille Q_a	m³/h
Power radiated by piping P_o	kW	Engine room intake grille area S	m²
Power radiated by accessories P_p	kW	The length of the side of the engine room grille square	m
Heating output P_v	kW

Resulting values for 1 unit

Total heating power P_{v total}		kW
Total fan power Q_{v total}		m³/h
The length of the side of the square of the common suction grid		m

The calculation of the engine room ventilation is for information only

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KUBÍČEK VHS, s.r.o. is a Czech company, founded in 1991, based in Velké Losiny, Czech Republic.

We are the largest Czech manufacturer and supplier of blowers for a wide range of applications. We guarantee our partners absolute professionalism in all aspects of our products and services. Blowers of our own design are developed and manufactured in Velké Losiny.

From the first contact with the client to the delivery and installation of the equipment as well as the following service, all KUBÍČEK employees are guided by the company’s main principles: To address customer requirements individually, quickly, correctly and above standard.

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