--- product_id: 11468054 title: "Dewstop Combination Humidity Sensor/Fan Control White 1 pk" brand: "dewstop" price: "7 zł" currency: PLN in_stock: true reviews_count: 10 url: https://www.desertcart.pl/products/11468054-dewstop-combination-humidity-sensor-fan-control-white-1-pk store_origin: PL region: Poland --- # Dewstop Combination Humidity Sensor/Fan Control White 1 pk **Brand:** dewstop **Price:** 7 zł **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Dewstop Combination Humidity Sensor/Fan Control White 1 pk by dewstop - **How much does it cost?** 7 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/11468054-dewstop-combination-humidity-sensor-fan-control-white-1-pk) ## Best For - dewstop enthusiasts ## Why This Product - Trusted dewstop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Buy Dewstop Combination Humidity Sensor/Fan Control White 1 pk: Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: No more reminding guests to turn on the exhaust fan - Update, late summer of 2019: The weather has been cooling off and we have been turning off the AC more often and opening the house for fresh air. The downside of this is that you can't control the humidity of fresh air and my Dewstop switches have been running quite a bit despite turning the humidity sensitivity all the way down. They sense the humidity coming in the window with the fresh air and activate. I finally contacted the company and was very pleased to receive a quick reply that the switches are designed to allow me to turn off the automatic sensing of humidity so that the switch acts like a regular, dumb, on/off switch. The procedure is, make sure the switch is off (no blue light), hold the main on/off button in for at least 15 sec. (The fan will come on when you let go, but just turn it back off, ignore that) This causes the switch to change modes. If the switch was automatically sensing humidity, it stops doing that. If it was in manual mode, holding the button will cause it to switch back to automatic sensing. This is the perfect solution to the problem. During this time of year, because I know I'll have open windows for awhile and plenty of fresh air ventilation in the house, I've set all my switches to manual mode. I can still turn on the fan with a push of the button, it just won't turn on by itself. When winter comes and I close up the house again, I'll revert them all to automatic mode. Well done Dewstop. Update summer of 2019: We are family that likes fresh air when the outside temps are comfortable. Unfortunately, this also means higher humidity levels inside the house. I knew I would have to adjust the switches for "summer mode" and this is my experience. Again, if you're a household that keeps the AC/Heat on year round with the house closed up, this probably won't be an issue for you. As the them outside temps come up and we start opening up the house more, humidity from the outside migrates inside. The switch doesn't know where the humidity comes from, just that its there and so the switch comes on. I turned the sensitivity all the way down, and the switches still come on. I looked in the troubleshooting guide and it talks about the electrical box enclosure. Basically, the box within which the switch is installed, has openings that allow air from inside the wall. This means that overnight, when the house cools down, the inside of the wall cools down also, and during the day when you open the windows and allow warmer air into the room, the switch is potentially feeling air that is slightly cooler inside the wall. The guide says to power down, remove the switches, and seal all openings in the box. However, that just means its now a seal box that is still not breathing to the room within which it is installed. I tested this idea by removing the cover plate so the box is open to the room, in less than an hour, the box had conditioned itself to the room temp and the switch stopped running constantly. So...not sure how to fix that problem. Light switch covers are not design to allow the box to breath from the room, and I'm not convinced that sealing the elec box with solve the problem. Bottom line, if you're purchasing this switch, recommend before installing it, that you seal the elec box first. If it does work, it will save you from having to do it later. So far, works perfectly. Comes on when condensation starts to form and doesn't shut off until the humidity is back under control. I read the negative reviews, and I can see how people might have difficulty with this product. Its sensitivity and automation will be affected by the static humidity in the house, which varies. I have electric heat, which is very dry. My current static humidity is around 45 percent. In the summer with the AC running, my humidity is in the 60s so I assume that I will have to adjust the sensitivity of the switch for summer. If we decide to turn off the AC and open the windows for fresh air, the humidity can get really high and if I don't adjust the switch for that, it will be kicking on often. Bottom line, the switch works great, you have to know the humidity in your home and adjust the switch to compensate for it. I ordered this one as a test, but am so happy with it, I'll be ordering more for the other bathrooms. Review: Great design, stopped working after ~30 days - Really like the design. Fan would turn on once humidity reaches the set point, and shuts off once it drops below. Worked flawlessly, for about a month, then stopped working automatically. Now the switch only works if it is manually turned on, and shuts itself off after ~20 15 minutes, but I could have purchased much less expensive options for a simple timed switched, and wanted this switch so a bathroom exhaust fan would operate automatically due to on humidity level. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00NODI9VM | | Batteries required | No | | Customer Reviews | 4.0 4.0 out of 5 stars (200) | | Finish types | Powder Coated | | Is Discontinued By Manufacturer | No | | Item Weight | 5 ounces | | Item model number | FS-300-W1 | | Manufacturer | GTR Technologies, Inc | | Product Dimensions | 2 x 3 x 4.75 inches | ## Images ![Dewstop Combination Humidity Sensor/Fan Control White 1 pk - Image 1](https://m.media-amazon.com/images/I/71hClQJUVaL.jpg) ![Dewstop Combination Humidity Sensor/Fan Control White 1 pk - Image 2](https://m.media-amazon.com/images/I/61UPOk4lbOL.jpg) ![Dewstop Combination Humidity Sensor/Fan Control White 1 pk - Image 3](https://m.media-amazon.com/images/I/51TNHkuOmQL.jpg) ![Dewstop Combination Humidity Sensor/Fan Control White 1 pk - Image 4](https://m.media-amazon.com/images/I/41wrr-+abKL.jpg) ![Dewstop Combination Humidity Sensor/Fan Control White 1 pk - Image 5](https://m.media-amazon.com/images/I/51PpxvQ5cpL.jpg) ## Questions & Answers **Q: Will this unit fit into a regular gfci footprint? i am replacing a fan control in a "2 gang" box so will need a different faceplate.** A: I currently have mine installed in a dual switch box along side a motion sensor for my bathroom light. my dew senor replaced the switch for the fan and the motion sensor replaced the switch for the light; both in the same switch box. both fitted very nicely with enough "wiggle room." **Q: Does it work on 220V/50HZ mains?** A: No **Q: My wall switch is too far from shower. Can this sensor/switch be used closer to the shower in a 3-way switch type fashion? (2 switches for fan)** A: How far is too far? My switch is between 6 and 8 feet from the shower and it works fine.. You just might have to play with the sensitivity to get it to come on when desired. Ad far as a 3-way application, I don't think it will work. Three way switches have an additional screw for the runner between switches that this switch does not have. **Q: What is the difference between the fs-300-w1 (amazon) and the hs-c00-w7 (big box store)?** A: The same except the HS-C00-W7 has QUE technology. Their claim is it is Ultra Moisture Sensing Adaptive Technology. ## Customer Reviews ### ⭐⭐⭐⭐⭐ No more reminding guests to turn on the exhaust fan *by K***H on December 11, 2018* Update, late summer of 2019: The weather has been cooling off and we have been turning off the AC more often and opening the house for fresh air. The downside of this is that you can't control the humidity of fresh air and my Dewstop switches have been running quite a bit despite turning the humidity sensitivity all the way down. They sense the humidity coming in the window with the fresh air and activate. I finally contacted the company and was very pleased to receive a quick reply that the switches are designed to allow me to turn off the automatic sensing of humidity so that the switch acts like a regular, dumb, on/off switch. The procedure is, make sure the switch is off (no blue light), hold the main on/off button in for at least 15 sec. (The fan will come on when you let go, but just turn it back off, ignore that) This causes the switch to change modes. If the switch was automatically sensing humidity, it stops doing that. If it was in manual mode, holding the button will cause it to switch back to automatic sensing. This is the perfect solution to the problem. During this time of year, because I know I'll have open windows for awhile and plenty of fresh air ventilation in the house, I've set all my switches to manual mode. I can still turn on the fan with a push of the button, it just won't turn on by itself. When winter comes and I close up the house again, I'll revert them all to automatic mode. Well done Dewstop. Update summer of 2019: We are family that likes fresh air when the outside temps are comfortable. Unfortunately, this also means higher humidity levels inside the house. I knew I would have to adjust the switches for "summer mode" and this is my experience. Again, if you're a household that keeps the AC/Heat on year round with the house closed up, this probably won't be an issue for you. As the them outside temps come up and we start opening up the house more, humidity from the outside migrates inside. The switch doesn't know where the humidity comes from, just that its there and so the switch comes on. I turned the sensitivity all the way down, and the switches still come on. I looked in the troubleshooting guide and it talks about the electrical box enclosure. Basically, the box within which the switch is installed, has openings that allow air from inside the wall. This means that overnight, when the house cools down, the inside of the wall cools down also, and during the day when you open the windows and allow warmer air into the room, the switch is potentially feeling air that is slightly cooler inside the wall. The guide says to power down, remove the switches, and seal all openings in the box. However, that just means its now a seal box that is still not breathing to the room within which it is installed. I tested this idea by removing the cover plate so the box is open to the room, in less than an hour, the box had conditioned itself to the room temp and the switch stopped running constantly. So...not sure how to fix that problem. Light switch covers are not design to allow the box to breath from the room, and I'm not convinced that sealing the elec box with solve the problem. Bottom line, if you're purchasing this switch, recommend before installing it, that you seal the elec box first. If it does work, it will save you from having to do it later. So far, works perfectly. Comes on when condensation starts to form and doesn't shut off until the humidity is back under control. I read the negative reviews, and I can see how people might have difficulty with this product. Its sensitivity and automation will be affected by the static humidity in the house, which varies. I have electric heat, which is very dry. My current static humidity is around 45 percent. In the summer with the AC running, my humidity is in the 60s so I assume that I will have to adjust the sensitivity of the switch for summer. If we decide to turn off the AC and open the windows for fresh air, the humidity can get really high and if I don't adjust the switch for that, it will be kicking on often. Bottom line, the switch works great, you have to know the humidity in your home and adjust the switch to compensate for it. I ordered this one as a test, but am so happy with it, I'll be ordering more for the other bathrooms. ### ⭐ Great design, stopped working after ~30 days *by J***M on March 20, 2019* Really like the design. Fan would turn on once humidity reaches the set point, and shuts off once it drops below. Worked flawlessly, for about a month, then stopped working automatically. Now the switch only works if it is manually turned on, and shuts itself off after ~20 15 minutes, but I could have purchased much less expensive options for a simple timed switched, and wanted this switch so a bathroom exhaust fan would operate automatically due to on humidity level. ### ⭐⭐⭐⭐⭐ Works great!!!!!! I had it over 2 years. GREAT PRODUCT! *by D***1 on April 28, 2017* The bathroom I used this in had a spring-based timer that was often not used or the hour max was not enough, Droplets of moisture would be on ceiling all day. This product solved the problem. You need access to the black hot and white neutral. If the fan wires do not directly to box you will need another wire (lets say red) to bring the power to the fan. The device itself has HOT (black), NEUTRAL (white) and RED (FAN), and GREEN ground. You can download the instructions from their web site. Basically the device gets fan HOT from the black, and passes it on to its RED to turn on fan. I will not attempt or answer wiring questions. All I can say it works as advertised. I used a humidity gauge to actually monitor its operation. This has worked perfectly for over 2 years . It works exactly as advertised. Don't expect it to know the difference between a damp basement (if used in basement) and humidity from a shower or from a damp house from humidity from a shower. Apparently some reviewers don't understand that and complain. This product saved us from mold, wasting electricity. I will buy another one for my next bathroom project. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/11468054-dewstop-combination-humidity-sensor-fan-control-white-1-pk](https://www.desertcart.pl/products/11468054-dewstop-combination-humidity-sensor-fan-control-white-1-pk) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-27*