Bathroom Heater & Exhaust Fan Calculator

Use our calculator to find the correct exhaust fan based on your room size.

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It is important to note that our calculator is a guide, only. It does not constitute specific advice from the team at Martec. These suggestions are provided on a basis of theoretical capacity for the given room, based on your supplied measurements. You should always check your local building codes and requirements before having a new exhaust fan is installed.