Preventing Condensation in Outdoor Enclosure

In summary, the person is looking for advice on how to prevent condensation on an outdoor enclosure for an AV receiver. They are considering using a seed starter heated mat, using a product to slow the dehumidification process, and lining the enclosure with a material that attracts condensation.
  • #1
MtnXfreeride
1
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Hi, I have comes across bits and pieces of what I want to do online but haven't gotten the answers I need so I'm reaching out for help. This is my first post here.

I'm planning to create a box to house an AV receiver outdoors (late spring/summer/early fall only in Maine) inside a screen porch. The box will need a door to open when in use to allow airflow and in the back a port for speaker wires and power cable/HDMI cable. Inside will also be a chromecast or amazon fireTV stick. It will get misted when it rains so the box should cover that base, however when the nights get cold I am imagining condensation will become a problem.

1. If I placed a "seed starter" heated mat inside the enclosure (I have one that is 15 watts) on a timer to run from say 6pm to 10am inside a weather protected box with small air leaks, would that alone prevent condensation? I doubt 15 watts would overheat the receiver when it is off, and the box would be open while it is on with more airflow. But is 15 watts enough for a small end table sized enclosure? Does the internal box temperature just need to be literally 1 degree above outside temp at all times to prevent condensation? I am also wondering if the chromecast or fireTV stock on standby alone would create enough heat in the box?

2. Is there a material I could line the box with on the sidewalls that would attract condensation to those areas as opposed to the metal case of the receiver? Condensation developed on this material could be captured by design.

3. Desiccants seem like they would be a hassle. I would have to close the desiccant container up when the stereo is in use and open the container before closing the box up for the night. I would also need to ensure the box is near 100% sealed. Would a product like "Damp rid" which I use in my basement closet work well enough? This product would be a slower dehumidifier since I can use one in my basement for several months and just dump out the water it collects.

The only risk for condensation for a receiver sitting outside (protected from rain) is when the ambient temperature raises faster than the receivers temperature can, because it is made of denser materials, right?Are there other properties of condensation that would make option 1 fail? Thoughts? Comments?
 
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  • #2
An induced flow of air just a few degrees warmer than environment will usually minimise condensation .

Basically a small electric fan and a low power heating element .
 
  • #3
If you are just going to be using electricity to warm your AV receiver why don't you just use electricity to power it thus keeping it warm? Standby mode may draw enough. This may be one time that "Vampire" power might be a good thing.

BoB
 
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Likes NascentOxygen and billy_joule

FAQ: Preventing Condensation in Outdoor Enclosure

What causes condensation in outdoor enclosures?

Condensation occurs when warm, humid air comes into contact with a cold surface. In outdoor enclosures, this can happen when the temperature inside the enclosure is different from the temperature outside, creating a temperature difference between the interior and exterior surfaces of the enclosure.

How can I prevent condensation in outdoor enclosures?

There are several ways to prevent condensation in outdoor enclosures. One method is to insulate the enclosure to maintain a consistent temperature inside, reducing the temperature difference between the interior and exterior surfaces. Another option is to use a dehumidifier to remove excess moisture from the air inside the enclosure. Additionally, incorporating ventilation to allow for air exchange can also help prevent condensation.

What materials are best for preventing condensation in outdoor enclosures?

Materials that can help prevent condensation in outdoor enclosures include insulation, vapor barriers, and materials with low thermal conductivity. These materials can help maintain a consistent temperature inside the enclosure and reduce the potential for condensation to form.

Can I use anti-condensation coatings to prevent condensation in outdoor enclosures?

Yes, anti-condensation coatings can be an effective way to prevent condensation in outdoor enclosures. These coatings work by creating a barrier between the warm, humid air and the cold surface, preventing moisture from forming on the surface. However, it is important to ensure that the coating is applied correctly and that it is compatible with the materials used in the enclosure.

How often should I check for condensation in my outdoor enclosure?

It is important to regularly check for condensation in outdoor enclosures, especially during periods of high humidity or temperature changes. This will allow you to catch and address any potential condensation issues before they can cause damage to the enclosure or its contents. Additionally, having a monitoring system in place can help detect condensation and alert you to any potential problems.

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