FREQUENTLY ASKED QUESTIONS

What can I do if some of the nozzles I received cannot spray fine water mist?

The DIGI MISTER humidifiers can support max. 5 fine mist nozzles. These nozzles are specially designed to be used for residential water pressure above 30 psi applications. They have a tiny orifice hole (ø0.1mm) and several small components which must work together perfectly to form a fine water mist. They are critical components, but inexpensive and can be cleaned or replaced easily. Our build-in observation window can help users to identify which nozzle is good or not. Only install the nozzles which can spray fine mist in your humidifier to avoid any potential water damages. DO NOT INSTALL FAULTY NOZZLES in your humidifier.

What can I do to fix the nozzles with imperfect water mist?

There are mainly two ways users can try to improve the nozzle spray condition:

• Take off the front cap, orifice plate, O-ring and swirl core from the nozzle. Clean them if there is any build-up. Use a ø0.1mm nozzle cleaning needle to clean the orifice hole. Put the components back in correct order. Install the nozzle in the humidifier to check how it performs.
• If there are two or more faulty nozzles, you can try swapping the orifice plate or swirl core between them. You may get good nozzles in this way.

What if the nozzles spray perfectly fine mist, but there are still some wet spot or water puddles in the duct?

In this case you need to reduce the water pressure and the number of the nozzles installed because the furnace hot air cannot vaporize all the water mist sprayed. You can also try to increase the hot air temperature or increase the draft motor speed for quicker evaporation.

How can I set up my humidifier for my multi-stage furnace with a variable speed blower?

In general, the multi-stage furnaces equipped with a variable speed blower, such as a ECM motor, will run in a slow motor speed and a relatively low hot air temperature (but not below 100℉). Due to slow air movement, you should decrease the water pressure, use a few spray nozzles (like 1 or 2) first to check if the water mist can evaporate fully, only increase nozzles if the furnace and duct is still dry. You may get enough humidity with fewer nozzles because this type of furnace is usually running at lower stage with long period time or almost constantly on.

Can I use my current furnace thermostat with a humidistat, such as a Nest Thermostat, to control the DIGI MISTER humidifier?

Your current smart furnace thermostat can partially control the DIGI MISTER humidifier. If you use the humidifier control function of a Nest thermostat to power up (24VAC) the DIGI MISTER humidifier, make sure to select "Hum.+Heat" for activate and set a high target humidity level on the DIGI MISTER. In this way the humidifier will be powered on when the Nest calls for humidity and for heat, the Nest takes over the control on humidity criteria. However, you must set the hot air temperature on the humidifier above 100 degree Fahrenheit so that the water mist can be sprayed and fully evaporated only when the hot air temperature in the duct reaches the setting point. The DIGI MISTER should still control when to start to spray mist.