This is our most common question... and this is the response you'll get from us when you email. If you still need help choosing a size, please email us after reading through this carefully... When emailing, let me know you read this, and include the size of your room, what the room is made out of (drywall, cement, plastic), air exchange level, ambient humidity, target humidity

Choosing the right size Mist Maker depends on a few different things:
ambient humidity, target humidity, air exchange, and the type of material your room is constructed of all plays a part.

A lower ambient humidity will increase the need for more discs, as well as a higher target humidity. The amount of air exchange you have will play the biggest part in deciding which size you need. If you are constantly bringing in new air, you have to work much harder to bring up the humidity. Rooms constructed of concrete tend to absorb moisture for quite some time before leveling out. This can increase your need for a bigger Mist Maker as well. 

With low/no air exchange, a smaller unit can be used. It may take longer to reach your target humidity level, but as long as drier areas not being introduced to the room, a smaller unit will suffice. 

With that said, I typically recommend a larger unit such as a 6 to 12 disc Mist Maker for larger area's like shipping containers and green houses. It is better to have a capable unit that runs much less, than a inadequate unit that has to run 24/7. Mist Maker's can heat the water that they are operating in, and heat can damage electronics. Very long run times in small amounts of water can push the max operating water temperature of 105°F. It's better to have a unit that runs for an hour on/hour off than 8 on, one off. 
 
For example, in a 4x6' growing tent with no/low air exchange, I'd probably use a single disc mister to achieve up to 100% humidity. 

A 10x10 room with high air exchange, a/c, and lighting would probably need a 6 disc unit at least, but could use a 12 disc as well, it just won't at 100%. 

A 40' shipping container with low/ moderate air exchange would probably need a 12 disc, or two 6 disc units. 

If my projects life depended on the humidity, I'd use two units running at half the time. That way you have some redundancy in case of a problem

There are so many variables that it's hard to actually say with certainty what you need. Most online charts don't take 90% of the factors into account. Hence why so many of my customers have already purchased, and came up short on the store bought units. 

How do I control my output/ what all do I need to buy?
 
The normal kit alone will get you started, but there are different options for controlling the output of your Mist Maker.

​ We offer fog output controllers to turn the fog level up and down, as well as humidistats.  Humidistats will automatically control your humidity within 3% of your target level. The machine automatically turns The Mist Maker's power on and off when needed.

For most humidification projects, it is recommended that you use our 120 mm, fully encased, waterproof fan in order to efficiently push the fog out into the room. Our smaller 80 mm fan is geared towards small applications like tanks, and grow tents. 

​Learn about it here!   http://thehouseofhydro.com/what-is-the-anti-corrosion-sealant.html

How long can I run a mist maker?

​Max recommended run time is 8 hours on, 1 hour off. However the run time is largely dependant on the water temperature. 105F is the max water temp. You need to keep it under this temperature, whether it is through shorter run times, or more water in the container that it is running in. For example, if you put a 12 disc water fogger in 100 gallons of water, you could run it 24/7, but if you put it in 5 gallons of water, you would need to shorten the run time to probably 2 hours, or risk exceeding the max temp which will shorten the lifespan dramatically. 

Check out our instructables article http://www.instructables.com/id/Make-a-humidifier-for-your-home-or-greenhouse-that/

How do I use "heavy" oil's/ additives with a mist maker?

You can use many different oils with a mist maker. These oils can increase surface tension of the water and reduce the output. To help correct this, you can use a plant safe product called Coco-Wet to greatly improve performance. 

Absolutely! 

Ultrasonic pond foggers can be used safely in aquariums with fish and other creatures. The smaller units do not raise water temps at all and create a mist on the top of your fish tank. We have a local distributor that owns a huge pet store. He uses water foggers in all his open top aquariums with no problems. One Heads and Three Head mist makers work best for fish tanks. 

One head mist makers are incredible for cloning, but not for full term growth. You can use smaller units to supplement another growing technique such as drip feed, NFT, or Shallow DWC. You will need a 3 head at least for a 5gal bucket grow, bigger is always better if your growing full term with fog.

You also don't want to put the mist maker into the container with plant, the roots will interfere with the water fogger. The mist maker also warms the water a little which isn't good.  You can pipe it in with the Fogponics machine that I make on youtube. 

You do need to cycle the unit, and can just use a simple timer for hydroponics. You also might need a mist output controller, or reservoir water level float to automatically keep your water tank full automatically. They are available on my mist maker accessories page. 

Using the 80mm fan, turn the fan speed down as low as possible. Too much air dilutes the fog, and drys out your roots. 

Yes! The dry fog produced by mist makers is perfect for greenhouse humidification. A huge portion of my customers are growing Orchids. They love the units, as they don't soak the plants or equipment and cause mold growth! 

​We sell mist makers worldwide! Some of the most popular countries buying our mist makers are the UK, New Zealand, Australia, and the Netherlands.  Our 230V mist makers have the two round pins for a plug. This common configuration fits almost all universal travel adapters that are readily available on Amazon. You just need to purchase a travel adapter to make it fit your countries plug.