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How Heat from Dehumidifier Helps to Optimize Your Grow Room

Growing plants requires controlling humidity, and most growers know this well.

However, using a dehumidifier can sometimes cause rising temperatures, harming plants. This article can help you effectively control humidity without raising the temperature in your grow room.

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Air Humidity

Heat generated by dehumidifier must be considered. Dehumidifiers remove moisture from the air, which will raises room temperature at the same time. As water is collected, it is converted into heat. To avoid overheating, we need to select dehumidifier with low heat output or use additional cooling methods.

A high temperature make the air hold more water, and increase the relative humidity. In contrast, lowering the temperature lowers the relative humidity and the moisture-holding capacity of the air. It's crucial to create an ideal temperature and moisture balance.

Particularly in the final stages of flowering, when plants evaporate a lot of water, room humidity increases. A drop in temperature leads to an increase in relative humidity, creating challenging conditions.

A dew point temperature represents the temperature at which air is completely saturated with water. Condensation of water vapor occurs when the surface temperature drops below the dew point. It can cause excess moisture and harm your plants.

Reduce Air Humidity

In a grow room, one way to reduce the relative air humidity is to increase the temperature. Especially useful when the temperature drops over 8 degrees Celsius after turning off the lights. A temperature difference of no more than 5-8 °C is recommended during dark periods. In general, the faster the plants grow, the greater the temperature difference between day and night should be.

You can control the height of the plants by adjusting the temperature difference between day and night, especially during flowering. Make sure your dehumidifier can extract enough water vapor. To reduce humidity at night, it is best to keep the temperature difference between day and night around 2-5°C.

Controlling humidity in your grow room requires a dehumidifier plus an air conditioner. Air conditioning units also dehumidify the air as they cool. When the air cools, vapor condenses into water. And you can also choose the new generation grow room hvac system, which providing the dehumidifying and air conditioning together.

Adjust Your Lighting Settings

The type of lighting you choose can have a big impact on temperature control. HID and plasma lighting generate a lot of heat, but LEDs generate less.

Overheating is a common problem. Dehumidifiers provide extra warmth during the cooler months, reducing your lighting wattage and improving air quality without adding excessive heat. Adjusting the light schedule can reduce the heat generated by a dehumidifier in a grow room. Keep the lights on or half off during cooler nighttime temperatures to reduce the strain on the dehumidifier.

Choose the Right Size Dehumidifier for Your Grow Room

Selecting the right size dehumidifier for your grow room is the first step. Too small a dehumidifier does not effectively control humidity, while too large a dehumidifier generates excessive heat. When 30 watts of cooling are required per cubic meter, air conditioners must be capable of handling the heat generated by the dehumidifier for optimal growth.

A dehumidifier can be used alone or with an air conditioning unit to enhance its dehumidification capabilities. However, it is essential to choose a powerful dehumidifier because passive models with water absorption are not enough for indoor growing. Remember that watering your plants releases water vapor into the air, which needs to be removed to prevent excess moisture. Active dehumidification is necessary to achieve this, especially with larger grow rooms.

While most indoor dehumidifiers only remove average air humidity at normal room temperature, a weak dehumidifier can still be helpful in a small grow room. If you want to dehumidify larger grow rooms, consult a manufacturer that specializes in dehumidifying areas for growing plants. The ideal dehumidifier will remove moisture between 25°C and 80% humidity.

Cool Down

You have two main options to cool the air: replace warm air with cold air from outside or use an air conditioner. Many home growers choose the first option, ensuring the incoming air is not hotter than needed inside the grow room. A powerful exhaust fan is sufficient for a basic setup.

When using a dehumidifier in a grow room, it is essential to have proper ventilation to prevent heat buildup. To ensure sufficient air volume, the ventilation power of the fan should be at least 40 times that of the planting area. For example, a 2 x 2 x 2 meter grow room requires a fan with a power of 240 m3/h. It is also essential to have an opening in the grow chamber to draw in fresh air under pressure. For better cooling, consider installing a second intake fan with half the power of the exhaust fan.

Fan-only cooling can be effective if the outside air is more excellent than needed. If the outside air is better than needed, fan-only cooling can be effective. On sweltering days, extra measures may be necessary. If you place a wet towel near the dehumidifier's opening, for instance, the air will be cooled. Slowly flowing water will provide better cooling effects.

Controlling the temperature and humidity in a grow room can be achieved in a variety of ways. Cooling can be achieved by blowing air over wet paper blocks.

However, this method may work for a large greenhouse and may not be the best solution for an indoor grow room. In these cases, an air conditioning unit may more effectively regulate temperature and humidity levels.

Position the Dehumidifier Correctly

To maximize efficiency and avoid overheating, it is critical to position your dehumidifier correctly in your grow room. Here are some tips on placing a dehumidifier in your grow room:

Ensure adequate air circulation: Place the dehumidifier where there is unobstructed airflow and prevent any possible obstruction from other equipment or plants in the grow room.

Avoid Excessive Heat Buildup: Dehumidifiers generate heat when running, so it is imperative to avoid placing them in closed spaces or directly next to plants. Excessive heat can harm cannabis plants, causing stress and potentially reducing yields.

Keep a safe distance from the plants: Place the dehumidifier at a safe distance from the plants to prevent any negative impact on the growth of the plants. The ideal length depends on the size of the grow room and the intensity of the heat generated by the dehumidifier.

Use fans for air distribution: Include fans in your grow room setup to help circulate and distribute dehumidified air evenly throughout the space. This ensures that all areas of the grow room maintain the desired humidity levels and promote healthy plant growth.

Easy Access and Maintenance: Place your dehumidifier where you can easily access it for routine maintenance, such as cleaning the filter or emptying the water tank. Proper care is critical to the long-term performance and efficiency of your dehumidifier.

Placement will also optimize the dehumidifier's lifespan and benefit your growing business.

Use the Drain to Drain Excess Water

A practical solution to maintaining optimal humidity levels without generating excessive heat is to use a dehumidifier drain hose to remove excess moisture from the space. Here's how to improve the environment in your grow room with a drain hose:

Choose the right dehumidifier: Many dehumidifiers have a built-in drain hose connection. Choose a model that allows you to easily connect a hose for continuous drainage, ensuring your growing room constantly regulates humidity levels.

Connect the drain hose: Following the manufacturer's guidelines, securely connect the hose to the dehumidifier's drain connection. Ensure the hose is the right size and material for your dehumidifier to prevent leaks and other problems.

Place the hose correctly: Route the drain hose to a suitable location, such as a floor drain, cistern, or collection container. Ensure the hose is positioned perfectly to allow gravity to assist the water flow, avoiding any kinks or sharp turns that could prevent drainage.

Secure hose: Use clips, brackets, or zip ties to secure the hose in place to keep it from falling out or creating a tripping hazard. This will help keep your grow room organized and safe.

Regular Maintenance: Check the drain hose for any signs of blockage, leaks, or damage. Remove any obstructions and replace hoses if necessary to ensure proper drainage and maintain the effectiveness of the dehumidifier.

Use a Hygrometer to Monitor Humidity Levels

Regularly monitoring the air moisture will ensure optimum humidity control. You can use a hygrometer to determine whether the dehumidifier is working effectively by measuring the air seperatley. Here's the tips how to do that;

Choose a reliable hygrometer: Choose a hygrometer with accurate readings and a clear, easy-to-read display. Digital hygrometers are generally more precise and user-friendly than analog models.

Proper placement of the hygrometer: Place the hygrometer in a central location within the grow chamber, away from direct drafts or heat sources that could skew the readings. Make sure it is easily accessible for regular monitoring.

Monitor humidity levels: Check the hygrometer readings regularly, at least once or twice a day, to keep track of humidity levels in the grow room. Target humidity levels between 40-60% for optimal growth of cannabis plants.

Adjust Dehumidifier Settings: Based on the hygrometer readings, adjust your dehumidifier settings as needed to maintain the ideal humidity level for your plants. This may involve increasing or decreasing the dehumidifier's fan speed, changing the humidity set point, or adjusting timer settings.

Keep your hygrometer calibrated: To ensure accurate readings, calibrate your hygrometer according to the manufacturer's instructions. This may involve using a calibration kit or following a specific calibration procedure.

By monitoring and managing humidity levels in your grow room with a hygrometer, you can create the optimal environment for your cannabis plants to thrive. In addition, regular monitoring and adjusting humidity as needed can help prevent common problems associated with improper moisture, ensuring a healthy and productive cannabis crop.

FAQ About Heat from Dehumidifier

1.Do dehumidifiers give out heat?

Yes, dehumidifiers give out heat. As they work by drawing in air, cooling it to condense moisture, and then reheating it, they produce warmth.

2.Why is my dehumidifier making my room hot?

Your dehumidifier is making your room hot because it's releasing heat as it operates. This is a normal part of the dehumidifying process.

3.How do I stop my dehumidifier from heating my room?

To stop your dehumidifier from heating your room, place it in a well-ventilated area. You can also use air conditioning to offset the heat.

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