In hot and humid climates, homes with basements or crawl spaces particularly need dehumidification to prevent mold from growing in the floor joists and subfloors. When mold grows unimpeded here, it can easily contaminate the air inside the home. No matter how many precautions you take inside the home, allowing hot and humid air to come into contact with subfloors that have been cooled by air conditioners will create the right conditions for growing mold. It is for these reasons that we proudly offer the MEGA DRY CS70 Dehumidifier, a powerful system designed specifically to fit into even the tightest spaces.
This amazing unit provides the dehumidification necessary to dry out even the wettest crawl space, removing up to 70 pints of water from the air each day in a closed crawlspace of up to 3,000 square feet. With a high efficiency filter, this unit cleans the air, removing mold spores and preventing future mold growth. The CS70 is also up to 40% more efficient than a stand-alone dehumidifier, saving you money right away. And it's easy to use, too. With a variety of installation and control options, including whole house ducting, operation can be as simple as setting the humidistat. Because the unit is permanently drained there are no buckets to empty or daily maintenance requirements, just dry, clean, healthy air, protecting your health and property.
Capacity: 70 pints/day
Coverage Area: 3,000 square feet in a closed crawlspace environment
Electrical: 110-120 VAC, 6.7 FLA Amps, 60 Hz, grounded
Operating Temp. Range: 50*F min, 95*F max
Air Flow: 280 CFM without external ducting
Filter Size: High Effciency (MERV 11) Pleated 11-3/4" x 11-3/4" x 2"
Size (Clearance): 13.75" H x 13" W x 27.25" L
Weight: 65 pounds
Duct connections: Return duct flange: 8" Round, Outlet 8" Round
Download Specification Sheet (PDF)
Posted by Everett Sharpe on 30th Sep 2015
Our crawlspace was growing mold and mildew until I covered the vents and installed the CS 70 about 6 months ago. The difference was noticeable after about a week. Now, no mold is growing and the air is noticeably cleaner under the house. We will likely install one in the basement of our church as well.
Posted by Richard Quarberg on 31st Aug 2015
I have been fighting condensation in my vented crawl space (1600 sq ft) for over a year in NC. With my air handler and hot water heater in the crawl space my ducting sweats terribly in the summer. So much that my flexiduct insulation fills with water and looks like a big wet saggy diaper. I spent a good deal of money last winter on replacing/improving the ducting insulation only to see the exact thing reoccur! I also 100% covered the floor with a heavy vapor barrier and sealed the seams to ensure water wasn't coming up from the dirt (builder had the floor 95% covered). Even after all that the condensation is still so bad that I have puddles of condensation forming on top of the vapor barrier. I finally did what I should have done last year, purchased this dehumidifier!
After tracking the humidity in the crawl space for 2 weeks (Aug) I found that it was in the 80% range consistently. It would fluctuate up and down a couple % depending on the outside humidity, but it never went below 79%.
I installed the unit yesterday evening with the crawl space humidity reading 80%, closed the vents to the crawl space and turned it on. I used a 25' run of 8" flexiduct to push the outlet air toward the back of the crawlspace to help air circulation. This morning the humidity level in the crawl space is 69%! 12 hours and a 10% drop! ...and that is with it raining all night and outside humidity currently 95%. The Mega Dry is working faster than I had imagined! Now to get back down there and seal off the vents completely and finish sealing up the crawlspace.
1. Outstanding air flow! Impressive how it inflated the 25' foil flexiduct when I turned it on and the end was blocked.
2. Extremely quiet! I hung it from the joists and you can not hear it running in the house. You can barely hear it running when in the crawlspace!
3. Easy to find a suitable location to access since the drain and filters can be accessed from either side. Simple to tap into my existing air handler AC drain.
4. Most importantly...It Works! The numbers don't lie. 10% in 12 hours...and this wasn't with the vents completely sealed yet.
5. Excellent service! I received my order the day after I ordered it!
1. The unit is heavy and you need two people to lift it for a joist hang. In all it took about an hour for the wife and I to install it.
Bottom line....highly recommend this unit! I spent close to the price of the unit in replacement duct insulation alone, not including the hours I spent down there doing the work.
Posted by Unknown on 14th Jul 2015
I put this just inside the crawl space for ease of access. Unfortunately this is just under our bedroom. The CS70 is so quiet that I can barely hear it running, even standing outside, next to the open crawl space entry. It also blows a strong warm dry air stream. Since I installed it myself, I really appreciate the light weight.
Posted by Unknown on 10th May 2015
Easy to install.
Posted by Unknown on 7th Apr 2014
I just bought my first MegaDry CS70 for a large crawlspace/basement encapsulation project (approx 2,000 sq ft) and I found the product to exceed my expectations. I deliberated over going with the larger, more expensive SaniDry unit (MSRP $1399), but went with the MegaDry based on Crawlspace.com's strong recommendation.
In no particular order here is what has impressed me about this unit:
- excellent air cleaning capability. This is one of the first things I noticed. When I turned it on the first time there was a lot of dust in the air and within minutes it was gone. I have allergies and have already noticed a marked improvement in air quality throughout the house.
- very efficient dehumidification capability. I was impressed with how fast it brought the RH down from 70% to 50% and it has maintained it +/- 1% RH since being put in operation.
- the unit is very quiet. I have it located in the crawlspace and I cannot hear it on the first floor when it runs.
- ease of installation. This unit is not so heavy that one person can't install it which is nice. It can be hung from the joist or just sit on the floor. Having the option of either side for the condensate return is nice also. Lastly, installing the optional condensate pump was a cinch.
- customer support. I initially thought my unit had a humidistat issue and so I called crawlspace.com. I was given the number for the supplier's customer support line and within minutes I was talking with a knowledgeable tech who then shipped me the needed parts.
Bottom line, I highly recommend this unit.
Posted by Mike on 3rd Sep 2013
I was surprised to find it raining under my house due to humidity and condensation from my HVAC duct work. Insulation had to be removed and HVAC ducts replaced. Sealed up crawl space and did encapsulation myself and installed Mega Dry CS70. It works great. This machine dried my crawl space out quickly. Only issue I experienced was with the plastic drain pan. Drain pipe got hit during insulation removal and cracked the plastic drain pain. Crawl Space Depot's staff was helpful and repaired my unit quickly and affordably. Wonderful people and great customer service. I highly recommend the Mega Dry CS70 and Crawl Space Depot to anyone.
Posted by Peak Energy on 9th Aug 2011
So far our company has purchased and installed two of these dehumidifiers in crawl spaces. They are compact and easy to install. We choose to hang them from the floor joists so the condensate will gravity drain without any problems. The 8" duct connections are sized properly for 8" flex duct. The auto-restart works great and the humidistat seems to be accurate. I like having the option to run the condensate drain from either side of the unit. Our installer accidentally overtightened the drain pipe and cracked the plastic drain pan inside the unit. Crawlspace Depot shipped us a replacement pan immediately. Another big plus is the homeowner's claim they don't hear it running. So far, this is an excellent unit for the money.