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  1. #1
    Join Date
    Oct 2019
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    2
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    Energy calculation for augmenting heat

    I have a 75 square foot Mudroom/Laundry room off my garage. It is cold. The space does not have a heat source and relies on air movement from adjoining space for heating. It is connected via a regular 30 inch door. In winter (zone 5) I use a table fan to blow air out of cool space into the warm space. It helps, but it is still a little cool.

    My question is around energy consumption for a small electric heater to augment the current situation

    Would the energy consumed be equal to the amount of btu required for the temperature differential? I.e. I could calculate BTU required to heat 75 sq feet from 60 to 70 (10F)? Online calculators indicate roughly 1500 btu, 450 watts.

    Is the calculation that simple, or does the in-room heat source somehow reduce the heat gained from the adjoining room such that the electric heater is providing more than the 10 degree differential?
    Last edited by Colinlewissmith; 10-21-2019 at 04:51 PM. Reason: Spellimg

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,459
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    Mud room in a cold environment I would use in floor radiant
    Water or electric.
    Keep the floor warm, that’s all you need!

  3. #3
    Join Date
    Oct 2019
    Posts
    2
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    Mud room in a cold environment I would use in floor radiant
    Water or electric.
    Keep the floor warm, that’s all you need!
    Hmmm.... the hot water tank is in the same space. A mini hot water radiant setup is an intriguing idea.

  4. #4
    Join Date
    Jan 2004
    Location
    PA
    Posts
    78,022
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    A little 500 to 750 watt electric baseboard should do fine for that area.

    Radiant floor is great, but might cost more upfront then it’s worth for a mud room/laundry room.
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