Factory Heat Load Calculator

Estimate the steady-state heating demand of an industrial building based on its dimensions, construction, and ventilation. Adjust the sliders to see how each variable drives your total heat loss.

Conduction

Heat that flows through walls and roof, proportional to their U-value and the temperature difference inside versus outside.

Natural Ventilation

Cold air infiltrating through every opening every hour. Even a modest exchange rate carries away significant energy.

Forced Ventilation

Mechanical supply or extraction, often required by dust or fume regulations. Typically the dominant loss in process buildings.

Building Inputs

Dimensions Length m 80 Width m 40 Height m 8

Construction Wall U-value W/m²K 2.0 Roof U-value W/m²K 2.0

Ventilation Natural air changes per hour 6 Forced ventilation m³/hr 0

Temperatures Outside temperature °C 0 Target indoor temperature °C 20

Heat Loss Results

Calculating…

Conduction

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Natural Ventilation

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Forced Ventilation

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Total Heat Loss

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Instantaneous steady-state calculation at the given outside temperature. Does not account for thermal mass, solar gain, or process heat.