When installed, should the unit attached to the cold air side of the furnace or on the warm air side?

Wednesday, June 12, 2013 by Aprilaire Team
Consumer question:
 
When installed, should the unit attached to the cold air side of the furnace or on the warm air side? It does not make sense to add water vapor on the cold air side, then heating the air and burning off some of the humidity.
 
 
Aprilaires' response:

It does not matter if the 700 is mounted on the hot air side, or the cold air side. The only requirement is... if installed on the cold air side, you have to run hot water to the humidifier.

Having humidified air put into the cold air return, then into the furnace to be reheated and put out to the home, will not hurt the humidity level. It will not burn off any of the moisture.

 

 

Does basement humidity have affect on my humidifiers operation?

Monday, December 31, 2012 by Aprilaire Team
Consumer question:
 
Aprilaire model 500 humidifier installed on 2-stage 95% furnace. Sensor is located inside cold air return from house. Cold water to humidifier. Does basement humidity have affect on humidifier operation ie. humuduty levels in residence. Have dehumidifier in basement set at 40%. On setting five humidity in residence is 32-35% Setting 6 36-39% Is this normal? I think it should be higher. Humidifier works in test mode. Insight?
 
Aprilaires' response:

Thank you for your email regarding your model 500 Aprilaire humidifier. Your Aprilaire humidifier control measures the humidity in the cold air return which is the air coming back to your HVAC system from your entire home. A dial setting of 5 would be equivalent to an indoor relative humidity of 35% anytime the outdoor temperature is 20F or above and the indoor temperature is 70F. A dial setting of 6 would be equivalent to an indoor relative humidity of 40% anytime the outdoor temperature is 20F or above and the indoor temperature is 70F. We design our humidifiers to maintain 35% anytime the outdoor temperature is 20F or above and the indoor temperature is 70F. The actually humidity a specific home will vary due to the tightness and cubic footage of the home as well as the runtime of your HVAC system. In addition a humidity level higher than 35% may cause damage to home. This is because as the temperature outside drops, the air in your home may not be able to maintain a humidity level above or even equal to 35%. If the humidity level is too high for the current outdoor conditions, the result is condensation on your windows. This is described in the attached owners manual. Based on the information you provided it appears your mode 500 is performing properly.

 

Tankless water heater and humidifier automatic model can they dance?

Wednesday, December 14, 2011 by Aprilaire Team
Consumer question:

I got this new humidifier and also I replaced to a tankless water heater. I wanted to use the humidifier in automatic mode and connected it to the hot water pipe. Since the flow is so low, the heater doesn't kick in to warm the water. Condensation occurs on the plastic tube inside the humidifier and drips down on the floor. What are my options in using the humidifier as desired (auto mode)?


Aprilaires' response:

Thank you for contacting us with regards to your model 600A Humidifier. Automatic mode refers to how the humidifier uses outdoor temperature to recalculate your humidity set point. As temperature drops, humidity settings should be lowered to compensate. The danger of leaving the humidity set point high as outdoor temperature falls is that your windows could start to collect that excess moisture in the form of fog or frost.
It's not clear what you meant by condensation. In this application, liquid water is converted to vapor, but for that water to re-condense, it needs to come into contact with a very cold surface. There is a drain line coming from the humidifier, but that needs to be properly attached to a drainage system. There will be a constant trickle of water running out of the unit as it operates.
Please let us know if you have any further questions.

Dip, Dip, Dip Switch settings...

Tuesday, December 13, 2011 by Aprilaire Team
Consumer question:

Your website says "The unit automatically turns on the dehumidifier blower for 2 minutes in a preset timeframe to sample temperature and dew point. You can customize the interval to 30 min, 1, 2, or 3 hours." How can I change the "preset timeframe"? The manual says nothing about how or where to modify this setting.


Aprilaires' response:

Thank you for your email regarding your model 1710A Aprilaire humidifier. There are a set of dipswitches on the control board labeled cycle period. The control board is located behind the control kob. You make access it by removing the access panel. The cycle period can be adjusted for 30 minutes, 1 hour, 2 hour or 3 hours. The sampling of the air to determine how humid the air is will occur with 3 minutes left in whatever option (30 minutes, 1 hour, 2 hour or 3 hours) you have selected. The default is one hour.

How does the Aprilaire model 400 measure humidity?

Monday, December 12, 2011 by Aprilaire Team
Consumer question:

How does the 400M measure the Humidity in the return air vent.

Right now It will only work when the dial is set all the way 45o


Aprilaires' response:

Thank you for contacting us regarding your model 400M humidifier. The manual control that comes with the 400M contains a membrane that expands and contracts depending on the amount of moisture in the air. It takes this measurement from the air that is surrounding the control, whether it is air from the duct or from the room the control is mounted in. If the control is turning the humidifier on at 45%, that means that the control is sensing the current relative humidity is between 40 and 45%. As the air in your home becomes drier, the humidifier will begin to run on a lower number.

If you have any further questions regarding this or any of our products, please feel free to contact our customer service department at your earliest convenience.

I would like to get an Aprilaire 1750A and run it separately from HVAC.

Friday, December 9, 2011 by Aprilaire Team
Consumer question:

I would like to get an Aprilaire 1750A and run it separately from HVAC. I want the dehumidistat to have a digital readout with the usual on/off and push button up/down of humidity setting. Which dehumidistat? Model #70? Model #75? What's the difference? Another model?

Aprilaires' response:

Thank you for contacting us with regards to our model 1750A Dehumidifier. Models 70 and 75 will each work with this model. The difference lies in how the controls sense humidity and how they use that information to create a set point. The model 70 sends humidity, temperature and set point values to the dehumidifier for it to use in determining if humidity is too high. The 75 works with a simple 2-wire signal to turn the dehumidifier on and off. This is a simpler control and works the way most other manufacturers' de-humidistats will work.

Please let us know if we can be of further assistance.

My Aprilaire Humidifier fails to feed water when the furnace is running..

Friday, December 9, 2011 by Aprilaire Team
Consumer question:

Unit was installed in February 2011. fails to feed water when the furnace is running.....even on the highest #7 setting. Worked fine last heating season

When the dial is moved to the "Test" setting, the water will flow and the 'reset light' will blink like it's supposed to....but when moved back regular run mode - even on # 5, #6 or #7 - it will not put water into the filter pan.


Aprilaires' response:

Thank you for contacting us regarding your 600A humidifier. Our controls have a built in design condition that allows the control to make a maximum of 45% relative humidity. If the digital screen has a value of 45% or above, the control will not turn on the humidifier outside of test. Also, the control has a accuracy differential of +/- 5%. So even if the screen reads 40%, due to this differential it may not turn the humidifier on.

Once the air in your home drops below 40-45% relative humidity your humidifier will turn on to add moisture to the air.

If you have any further questions regarding this or any of our products, please feel free to contact our customer service department at your earliest convenience.

Does Aprilaire make a dehumidifier for indoor pool rooms?

Tuesday, November 29, 2011 by Aprilaire Team
Consumer question:

Can one of these whole house dehumidifiers be used for an indoor pool room that has a seperate furnace system without A/C?


Aprilaires' response:

Thank you for your interest in the Aprilaire dehumidifiers

I am sorry that Aprilaire dehumidifiers are not designed for use in a pool area, due to the corrosive nature of chemicals used in the pool. There are units manufactured for use in a pool area; a company called Desert-Aire makes such models. their number is (262) 946-7400.

If there are further questions regarding the Aprilaire dehumidifiers please contact us at the number below.

How do I set the dip switches on my Aprilaire dehumidifier?

Monday, November 28, 2011 by Aprilaire Team
Consumer question:

I have the DIP switches to run my 1750 every 3 hours for 20 minutes yet it seems to run for much longer than that. Is there a problem with the unit or am I not understanding the role of the DIP switches properly?


Aprilaires' response:

Thank you for your recent purchase of the Aprilaire dehumidifier. We expect that you will enjoy the comfort that the dehumidifier provides for many years.

The Dip switch settings you refer to are designed to determine how often the unit will take a sample of humidity level; and to determine the length of time the fan will run per sampling cycle.

The cycle period, when set for three hours will take a sample of air every three hour to see if dehumidification is needed, if needed the dehumidifier will run as long as necessary to dehumidify the air the setpoint set with the control knob. The cycle time determines how long the fan will run during the testing period. We have found that in the majority of conditions that setting the cycle period to one hour, and the cycle time set to 0 is the most cost effective setting for comfort.

If you would like additional information on the set up of the dehumidifier, please contact one of our customer service representatives at the number below.

1-800-334-6011
Visit www.aprilaire.com
Hours Monday - Friday
7:00 a.m.- 5:00 p.m. CST

How high can I get my humidity in my house using my Aprilaire 600 humidifier?

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

I have a model 600 Aprilaire Humidifier.  When we get sick, I would like to be able to turn up the humidity. Currently, when the humidifier was turned up to 8, it would not go on. The humidistat on the Aprilaire read 52-54%. It has been in the 40s at night, 50s during the day (Minnesota). However, I would like more moisture in the air. Today I tried forcing the humidifer on by turning all the way to the right (green light is blinking). But humidity level reads only 56%. Will the computer prevent this humidifier from going over this? Or, is it possible that I am not getting good water flow through?

Aprilaires' response:

Thank you for your inquiry about you Aprilaire model 600 humidifier and control. We appreciate your input.

The Aprilaire line of humidity control are programed for limiting the humidity to 45%. This was intended to prevent the "sweating" of the windows in the colder conditions. In the instance that you turned the control all the way to the right, you place the humidifier in the test mode; which is a one time test for one minute. Please turn the control knob at or below the number 7 setting. If you require a humidity level higher than 45% there are controls that can obtain higher humidity settings. Just beware that when you see moisture on the windows or door jams that you turn the setting down.

I hope that this has given you enough information. if you have additional questions feel free to call or write.

Sincerely




Roy Holloway
Technical Support
Aprilaire - Division of Research Products Corporation
1-800-334-6011
Visit www.aprilaire.com
Hours Monday - Friday
7:00 a.m.- 5:00 p.m. CST


>>> John Albright

I am looking to purchase a standalone high capacity dehumidifier for our basement 30 x60 non ducted.

Friday, November 11, 2011 by Aprilaire Team
Consumer question:

I am looking to purchase a standalone high capacity dehumidifier for our basement 30 x60 non ducted.

What of your units do you suggest?


Aprilaires' response:

Thank you for contacting us with regards to our Aprilaire Dehumidifiers. Based on your criteria, we would recommend the model 1710A. It has the moisture removal capacity for spaces up to 5000 sq ft and does not require any ducting. It is rated for 90 pints/day. Please see the attached brochure for more information.

We appreciate the opportunity to be of assistance.

Will the Aprilaire model 800 Steam Humidifier produce enough humidity for my whole home?

Thursday, November 10, 2011 by Aprilaire Team
Consumer question:

I have a 2400 sq ft home 10 ft ceilings with 1700 sq ft developed in basement. Will the 800 steam unit provide adequate protection with hardwood floors throughout.


Aprilaires' response:

Thank you for contacting Aprilaire.

Yes, the 800 steam humidifier should be able to properly humidify your home. Actually the 800 is capable of humidifying larger areas, but that would be good anyway since the needs for humidity in your home are greater than an average home. We say this because of the extra woodwork having hard wood floors throughout the home. This will grab alot of the moisture.

There will be no 'over kill' because once you reach the RH level you are looking for, the humidifier will turn off.

Please let us know if you have any further questions.

What's the difference between the Aprilaire 1750A and 1770A dehumidifiers?

Wednesday, October 26, 2011 by Aprilaire Team
Consumer question:

I need to know what the difference is between the 1770A and the 1750A?


Aprilaires' response:

Thank you for your interest in the Aprilaire line of dehumidifiers.

The physical dimensions of the two units are the same, the 1750A weighs 93 pounds, the 1770A weighs 100 pounds, The 1750A will remove up to 90 pints per day whereas the 1770A removes up to 135 pints per day.

Which Aprilaire should I go with?

Monday, October 24, 2011 by Aprilaire Team
Consumer question:

Of the aprilaire 400 500 or 600,700, etc... which one do you think is right for me?

I have a home that is 2000 sf finished with an additional 1100 sf of basement which is unfinished now but will be in the future.

How do you account for basement in sf of humidification?

Which Aprilaire should I go with?


Aprilaires' response:

Thank you for contacting Aprilaire.

Based on the information that you have given us, it looks like the 600 would probably be the best choice. Now, with that said, do you have a lot of wood in your home? Like, wood floors, a lot of wood trim, instruments like a fine guitar or piano? This all would need much moisture in the air to keep them nice. That will make a difference in which unit would be best.

As for the basement.... you may not have it 'finished' yet, but the air is exchanging from main floor to basement much that it would through an open window. So, yes, that space will need to be included in configuring your humidifier.

If you do not have the extra wood floors, trim, or instruments, you would be fine with a 600. If you have the extras, you may want to consider going with a steam unit #800. That will guarantee coverage for the wood and comfort of your family.

Please let us know if you have any further questions.

Will my Aprilaire dehumidifier and humidifier work together?

Thursday, October 20, 2011 by Aprilaire Team
Consumer question:

We have just had our basement waterproofed and we are going to have a dehumidifier installed that will benefit the whole house. At the same time we have this humidifer on our furnace that we turn on in the winter when the heat is on. Will there be a conflict if the dehumidifier is taking moisture out of the house and the humidifier is putting moisture into the house. How do these to items work together?


Aprilaires' response:

Thank you for contacting us with regards to your model 560 Humidifier. Our humidifiers and dehumidifiers each have a control that tries to keep the humidity above or below a certain value. When operating both types of unit in the same home, we recommend that the two controls be set so that their set points do not overlap. For example, a humidifier can be set up to 45% RH, so the dehumidifier should not be set to go below 50%. This way a buffer exists between the two units and they should not fight against each other. Conversely, you could simply turn off one unit during its off-season. Dehumidifiers don't need to run during the winter or humidifiers during the summer.

Do I have my Aprilaire Model 800 Steam Humidifier set correctly?

Thursday, September 29, 2011 by Aprilaire Team
Consumer question:

I just had my model 800 installed today. The technician went over everything regarding adjusting the level based on outside temperature. However, currently we are still using are air conditioner. Reading your manual doesn\'t clearly address this situation. Should I actually turn the humidifier off during the months that the air conditioner is running. If not, what is the best setting for the humidifier?? The tech left it at about a setting of 5-6. Thanks


Aprilaires' response:


Thank you for contacting us regarding your model 800 humidifier. Typically when the air conditioning is running, the humidifier will not be used because the natural humidity level is higher than that which the humidifier will produce. If you choose to use your humidifier year round because you live in a drier climate, you can but some of the moisture put into the air would be removed by your air conditioning system. If it is not necessary to add humidity during the months your air conditioning is running, simply turn the control knob on the humidistat to the lowest setting. It is not necessary to turn the unit off.

If the control is left in the normal range of 5 or 6 and there is not a call for humidity for 72 hours, the 800 will automatically go into a drain cycle to drain the water from the canister. However the unit will still be on and if the humidity drops below the setpoint you're asking it to maintain, the humidifier will fill the canister and begin making steam. In other words, the only time you ever need to turn the 800 off is when you change the canister. Other than that, the operation of the unit can be controlled by the humidistat.

The manual doesn't address that mainly because the humidifier will not operated during the summer months in most parts of the country. In your case, living in Utah, it is perfectly fine to leave the humidistat on the setting of 5 or 6 and allow the 800 to add humidity, if needed, year round. If you prefer not to have the unit running with the air conditioning, turn the control knob to the lowest setting.

If you have any further questions regarding this or any of our products, please feel free to contact our customer service department at your earliest convenience.

Did I get the right Aprilaire Dehumidifier for my house?

Thursday, September 29, 2011 by Aprilaire Team
Consumer question:

I very recently bought the 1710A dehumidifier. I\'m concerned that it was the wrong product for my house though. I would like to discuss with someone whether the 1710A is a good solution for a finished basement (i.e. can it work through the walls to individual rooms in the basement) or if a whole house/central air solution would be more appropriate (and if so, general costs). The purchase is still recent enough that I should be able to return the 1710A model.

Aprilaire's response:

Thank you for contacting us about your 1710A dehumidifier.The 1710A is a great portable unit for use in spaces that are open and have good air flow from room to room. If your space is sectioned off into separate rooms that can be closed off from each other than the 1710A will not work as effectively as you might like.

In these situations we recommend going with a whole-home unit such as the 1750A. The 1750A would connect to your duct work and dehumidify the home equally. This may be your better option. The 1750A should cost about the same as the 1710A but there would be a charge for a dealer to install it. I would recommend contacting a dealer about installation prices.

Please contact us at 1-800-334-6011 for any further questions.

Is one of the Aprilaire dehumidifiers best for my house?

Tuesday, September 20, 2011 by Aprilaire Team
Consumer question:

I am looking at installing a dehumidifier in our 3300 sqft two story house (currently have one in crawl space) located in southern Maryland. My objective is to keep the house at a higher temperature ~76-77F and lower 45%RH; this way the dehumidifier is running versus the a/c to hopefully reduce electrical costs while maintaining comfort. And I am looking at the 1730A and 1750A and had a few questions and hope you can help me. My questions are:

1. I am currently running a portable Whirlpool 50 pint dehumidifier, and a few ceiling fans on slow and it seems to be keeping the humidity at the set 45%RH throughout the whole house (running most all of the time). I was looking at the 1730A or 1750A and was planning on installing it in a closet on the first floor. The ducting would enter the unit from one room (through closet wall) and exit into another room (through opposite closet wall) in a straight line near the center of the house. Would there be a concern of the closet heating up too much or any other issues? The drain line would go through the floor into the crawl space and be pumped out. (The closet currently has an electric water heater in it that I am removing so I will have a electrical outlet in the closet).

2. Based on literature the 1750A seems to be quieter than the 1730A, is this true, even though the CFM seem to be higher? If there is a foot of ducting at the inlet and a foot of ducting at the outlet would the unit tend to be noisier than if the 10 foot that appeared to be recommended in the literature for proper static pressure?

3. Is this a proper application since I have two a/c units with three controlled zones? I was trying to keep the dehumidifier independent from the a/c but is this a bad idea or not recommended?

4. I have drawing up the installation plan and mechanically everything should install fine. Do you see any issues that I may be missing? Is the 1750A recommended over the 1730A for this application? Is further information needed? Can a controller be hooked up to the unit to be put on the room wall to control the unit from outside the closet?


Aprilaires' response:

Thank you for your questions about the Aprilaire dehumidifiers. The questions are very good questions, and I will give you the best answers possible.
For your home in southern Maryland the 1730A would be capable of dehumidifying up to 1800 sqft in a newer home; compared to the 1750A which can dehumidify up to 2600 sqft. The dehumidifiers can operate in ambient conditions up to 105F degrees. With the air flowing through the unit I don't feel that this would adversely effect the operation of the unit.
As for the noise rating of the equipment yes the 1750A is quieter by 3-4 dba primarily due to the fan configuration. As for the noise level in the shorter duct, you can expect to have wind noise on the shorter runs. Try to have a minimum of 6 feet of duct to attenuate the noise.
Your closet configuration does appear to be appropriate. Piping the drain into the crawl space would be fine into a floor drain or sump crock.
Both dehumidifiers can be used as "whole house" connected to HVAC systems or "stand alone" without connection to HVAC systems. Controls can be connect to remotely operate the dehumidifiers, but in this application I don't see any advantage to them.
The only additional information that I can suggest is that approximately 18 inches be open around the unit for access to internal components, when the need arises.

Again thank you for considering the Aprilaire line of products.

Where should my Model 550 Aprilaire humidifier be located?

Tuesday, September 20, 2011 by Aprilaire Team
Consumer question:

Recently I had central air conditioning installed on my hot air furnace. After installing the coil the contractor found that there was no room left to reinstall the Aprilaire 550 whole house humidifier on the supply side. He then installed it on the return side just before the Hepa air filter cartridge. He ran an aluminum circular flexible duct over to the supply side.
I have concerns about this:
1) won't this simply force water into my hepa filter and create mold /mildew in it?
2) By the contractor running the flexible circular ductwork over to the supply side - is this sufficient to force all the available water moisture coming from the Aprilaire unit into the supply ductwork?
3) Should the unit now be attached to the hot water line instead of the cold water line?
4) Considering the lack of room to install on the supply side [since the a/c coil has been installed] is there any other more preferable place to install this uni
t other than the return side - and risk soaking the Hepa cartridge air filter?

Thank you for your time and consideration on these critically important matters.


Aprilaires' response:

Thank you for contacting us about your humidifier and addressing these issues with us. I'd be happy to explain what can be done here.

1) It is ok for the humidified air to be introduced ahead of the filter. This is because our humidifier is creating a vapor. Vapor is just like the moisture already in the air. Its invisible, light and cannot condense onto anything such as the filter media or the duct work itself.

2) The beauty of our by-pass humidifier models is that the force will be equal no matter which side the unit is installed on. This is because force from the furnace is the same regardless of any new add-ons.

3) Cold water may be ok. If you have a standard furnace and only run the humidifier when the heat is on than cold water is okay. The only time cold water would be bad would be in situations where you run your fan to try and humidify (no heat source in this application).

4) Referring back to question 1, If the supply side is not available and return side is a equal alternative. Air flow will still allow the air to circulate through the air filter without harm and will continue to create and obtain the adequate humidity you are looking for.

If you have any questions please give us a call @ 1-800-334-6011.

Can Aprilaire Dehumidifers be used in pool rooms?

Monday, September 12, 2011 by Aprilaire Team
Consumer question:

My engineering firm is designing a whirlpool room at a retirement community. Can the 1770a be used with a fan powered Air Terminal Unit, sometimes called a VAV box but in our case it will be constant air flow. If so, and it seems to me that it would work very well, is there a minimum cfm that the air terminal unit must supply for the 1750A or 1770A to work correctly?

Aprilaires' response:

Thank you for contacting us with regards to our model 1770A Dehumidifier. Our dehumidifiers supply their own blower to move air. While they would work with the system you've designed, it can also work as a stand-alone system. Our concern would be the application, however. Our Aprilaire Dehumidifiers are not designed to work in pool applications. As they often use chemicals to treat the water, when they become airborne, they can corrode the circuit boards inside the dehumidifier. Unless the application will be using a non-chemical based water treatment system, we would not recommend any Aprilaire unit to provide the dehumidification needed. If it is using an alternative method to treat the water, we can offer suggestions based on the size of the application. Please let us know if we can be of further assistance.