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IW25-4

IW25-4 in wall dehumidifier with cover and base unit with brackets. IW25-4 on wall dehumidifier with cover and base unit, brackets not needed for on wall installation.
Graphic of the fixed IW25-4 dehumidifier to show the separation of the front diffuser, MERV-8 air filter, front cover, and base unit.

IW25-4 Resources:

  • Innovative Installations
  • IN Wall Specifications
  • ON Wall Specifications
  • ON & IN Wall Submittal Data Sheet
  • IW25-4 Installation and Operations Manual
  • IW25-4 Product Warranty
  • Product Maintenance
  • Operation Troubleshooting

IW25-4 Optional Accessories

  • IW-25-4 Condensate Pump Specifications Sheet
  • IW-25-4 Exterior Sleeve – Installation Manual
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Why MOLD is a Growing Problem?

IN Wall dehumidifier with moisture produced from steam and laundry machine

“Mold spores are everywhere.” – Richard F. Progovitz (author of Black Mold: Your Health and Your Home)1

Mold grows everywhere because microbial spores are everywhere. S.S. Block’s article Humidity Requirements for Mold Growth states that “in a discussion of the mildew problem, mold requires for growth and proliferation certain essential physical and chemical conditions. These include satisfactory temperature, adequate moisture, sufficient oxygen, proper pH, and essential nutrients.” Kathleen Parrott, Ph.D., goes into further detail in her article about mold prevention solutions explaining that “molds digest organic matter as a food source. This includes many materials found in our homes, including wood, paper, textiles, plants, and food. Therefore, there is always a food source for molds in our homes, including many of the materials that we use to build and furnish our homes.”3 Unfortunately, we cannot control most of these factors especially in smaller, tighter envelopes such as apartments, but we can help control relative humidity with the use of a dehumidifying system. According to Block “the control of moisture through regulation of humidity has proved to be most satisfactory.”2

Contributing factors to mold include:

Family of four preparing to cook dinner in the kitchen a daily activity that adds moisture to the air.

1. Daily Moisture – 25 Pints

The ASHRAE Handbook of Fundamentals states, “a typical family of four may produce as much as 11.4 L/day (25lb/ day) of water vapor or more if humidifiers, automatic washers, and clothes dryers are used”. 4 In other words, on average, a family of 4 produces 11.4 L/ day, almost 25 pints of water per day. Moisture is released into the air from daily activities such as cooking, cleaning, laundry, showering, perspiring, etc. The World Health Organization (WHO) states that “the capacity of building and interior materials to absorb and release moisture has a significant effect on indoor humidity fluctuations and may have consequences for moisture damage and dampness”.5

A shower head turned on and a pot of steaming water will increase the amount of humidity indoors.

2. Daily Habits

Daily habits differ from person to person. For example, some choose not to run exhaust fans while cooking or showering. Others may not leave their residence often, while others cook all day. Some people choose to house many plants and/or aquariums. According to Stephen Smulski’s article on the Durability of Energy-Efficient Wood-Frame Houses, “water vapor generated by occupants’ activities and released from other interior sources lingers longer indoors. When warm, moist air entering into these spaces is cooled below the dew point, the excess moisture is deposited as condensation on framing, sheathing, and other cold surfaces, creating conditions favorable to mildew, mold, and decay fungi”6

3. New Construction = Tighter Envelopes

We are seeing an increase in mold growth due to tighter construction regulations. It is great to be energy efficient but In recent years, there has been an increase in mold growth indoors due to tighter construction regulations. According to John Manuel’s article A Healthy Home Environment “since the energy crisis of the 1970s, builders have concentrated on building tighter homes as a way of minimizing heating and air-conditioning costs. Tighter houses can be healthy houses, but more care must be taken to avoid generating or trapping pollutants indoors”.7 High-efficiency HVAC systems are much more efficient and run for shorter periods of time. This is exceptional for HVAC systems, however as a result, moisture does not have an escape route and cannot be cycled out. In reference to Aaron McGill Cooper’s thesis, Mold Susceptibility of Rapidly Renewable Materials used in Wall Construction, “although tighter building construction practices save energy, they can also create an environment of stagnant air that is highly hospitable to mold.”8 Cooper goes into further detail about moisture trapped indoors explaining that “undesirable moisture is then introduced by unavoidable activities such as showering, cooking, cleaning, and sweating, along with unplanned events such as spills, overflowing toilets, or plumbing malfunctions”.8 Kathleen Parrot, Ph.D., Professor of Housing, states that “to control mold growth in our homes, we must control excess moisture and water!”9

4. Introduction of Fresh Air Vents

Many codes require the introduction of “fresh” air from outside. According to the World Health Organization, “ventilation also affects air and moisture flow through the building envelope and may therefore lead to moisture problems that degrade the structure.”10 Introducing outside air with high humidity into your property will increase the relative humidity and allow the opportunity for pollutants to come indoors. Biological pollutants are found to some degree in every home, school, and workplace. Referencing John Manuel’s article, A Healthy Home Environment, “biological pollutants are found to some degree in every home, school and workplace. They come from outdoor air in the form of pollen and other allergens, from human occupants who expel viruses and bacteria, from pets that shed dander, from insect pests, and from moist surfaces that allow mold and fungi to grow.”7

Humidity Happens…

What’s your Plan to Lower High Humidity?

Source:
1. Progovitz, R. F. (2003). Black Mold: Your Health and Your Home. The Forager Press, LLC
2. Department of Chemical Engineering, University of Florida, S.S. Block, June,1953, ASM Journals, accessed October 2021. <https://journals.asm.org/doi/pdf/10.1128/am.1.6.287-293.1953>
3. Virginia Polytechnic Institute and State University; Robert Grisso, Martha Walker, Phillip Agee, and John Ignosh, Virginia Cooperative Extension, accessed October 2021.
<https://resources.ext.vt.edu/contentdetail?contentid=2227&contentname=Energy%20Series:%20What%20about%20Mold%3F>
4. ASHRAE Handbook of Fundamentals, ASHRAE, Atlanta, GA, 1991.
5. World Health Organization, Ollie Seppänen, Jane Kurnitski 2009, National Center for Biotechnology Information, accessed October 2021.
<https://www.ncbi.nlm.nih.gov/books/NBK143947/>
6. Smulski, S. (1999). Durability of Energy-Efficient Wood-Frame Houses. Forest Prod. J.
7. Focus: John Manuel, July 1999, A Healthy Home Environment, accessed October 2021. <https://ehp.niehs.nih.gov/doi/pdf/10.1289/ehp.99107a352>
8. Cooper, Aaron M. Mold Susceptibility of Rapidly Renewable Materials used in Wall Construction. 2007. Texas A&M University, Master of Science. Core, <https://core.ac.uk/download/pdf/4276521.pdf>
9. Virginia Polytechnic Institute and State University; Kathleen Parrott, Ph.D. 2009, Virginia Cooperative Extension, accessed October 2021.
<https://vtechworks.lib.vt.edu/bitstream/handle/10919/50219/2901-7020.pdf?sequence=1>
10. World Health Organization, Ollie Seppänen, Jane Kurnitski 2009, National Center for Biotechnology Information, accessed October 2021. <https://www.ncbi.nlm.nih.gov/books/NBK143947/>

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What our Customers are saying….

  • 5
    "We have purchased and installed about 11 of the IW25 permanent dehumidifiers, and they are performing very well.  They have remedied our ongoing problem with high RH in certain apartments, and are the perfect solution. The fact that we can install them, set, and forget them is the true beauty of the product! Previously we had tried to manage the problem by supplying portable dehumidifiers, but always had trouble.  Even with the best of intentions, the resident fails to empty the bucket, or turns the portable off because of noise, or some other reason. But the resident quickly forgets the permanent dehumidifier is even there.  It is quieter, out of  the way, and requires no effort or attention from the resident. It's been a great solution for us!"
    Requires no Effort or Attention from the Resident
  • 5
    "As a resident of the north east we experience many days of high humidity throughout the year. I searched the internet until I ran across Innovative Dehumidifier Systems,LLC. I called and spoke with the tech people and a sales representative and decided to purchase their IW-25-4 IN Wall unit it wasn't even on the market yet, it was still in development. I placed the order and within about 5 weeks it was sitting on my porch just as promised. It was very easy to install only took less than a half hour to have it up and running, its working great I'm very pleased with the unit and the folks at Dehumidifier Systems,LLC." -Paul B. Pennsylvania
    Took less than a Half Hour to Have it up and Running
  • 5
    I was unsure how customer support was gonna be at first. But Thank You for being an "A PLUS" company. I'm glad I chose your company.
    “A PLUS” company
  • 5
    "We have installed the IW25-4 In-Wall dehumidifier and quite frankly, I love it.  It is the perfect solution, works great and was easy to install.  I am very happy with your product!" -Christopher L.  
    The Perfect Solution
  • 5
    "We bought an Innovative Dehumidifier for our restaurant in the Summer of 2020 and due to the fact that it has performed so well when we had humidity issues with our home this summer we reached out again and were quickly offered a solution and product. The team at at Innovative is outstanding and solutions oriented and go the extra mile to make sure the what was offered and purchased meets the demands after installation. Outstanding job, thank you."
    Solutions Oriented
  • 5
    "You guys are great to work with. Great product, great delivery all around, from customer service to getting the dehus to projects on time, with no damages from shipping. Easy install and great performance. I felt right at home talking with Leah and Brian when I was introduced to the new and improved dehu." -Mr. Jones President / Contractor Multifamily Industry Purchasing Since 2012
    Easy install and great performance.
    Mr. Jones - President/ Contractor
  • 5

    "I am pleased to inform you that I have had a positive experience regarding all aspects of the dehumidifier; performance of the IW25 unit has surpassed my expectations with regard to ability to extract moisture in cool(er) ambient temperatures.  I truly wish there were more US companies with the manufacturing attention to detail and level of customer care and concern that Innovative Dehumidifier has provided.  I'll be spending my money with the Innovative Dehumidifier Company the next time I have the need. 

    Thanks again!" Regards, Travis M. Electrical Engineer
    Surpassed my Expectations…
    Travis M.- Electrical Engineer
  • 5
    "In working with Innovative Dehumidifiers, I was thoroughly impressed with their knowledge. Not only about the product operation, but the installation and specifications. It was a pleasure working with them. And, we have a very satisfied customer. Thank you very much!"
    Superior Customer Service and Assistance
  • 5
    "We have been very pleased with the IW-25. They are easy to install, efficient, quiet, and provide a nice finished look. They provide permanent dehumidification with basically no required maintenance."
    Easy to Install
  • 5
    "The install of the unit was very easy. So far I am more than pleased with the unit and customer service experience I've had with your organization."
    Install of the Unit was very Easy
  • 5
    "We love the units over the competition.  They are quieter, more efficient, smaller, and operate cooler therefore keeping our units cooler for our tenants."
    Quieter, More Efficient, Smaller
  • 5
    "The IW-25 is clearly my first choice for dehumidification when an installed, economical, low maintenance and finished looking solution needs to placed… [Innovative Dehumidifier’s] customer service is hands on- they really know construction. It shows in the design and efficiency of this unit…"
    First Choice for Dehumidification

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6260 Ocean Highway W
Ocean Isle Beach, NC 28469

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