They told me it indeed can be activated by humidity alone. Back on … With Ecobee integration, you can use Flair to personalize the temperatures of different rooms. But for nights that is warm enough, the AC will be turning on frequently anyway, and it would be counted toward circulation, so for those nights, humidity will be in check through regular AC activity. While the binding will continue to work using the old authorization method, it's recommended that you reauthorize the binding using the following process. Aux Heat Settings. I wonder how the max overcool temperature and the cooling differential temperature interacts together. The option works well with those types of systems because they can turn on much lower fan/compressor rates to dehumidify. More categories. Smart Recovery. Then select HVAC. Now that I have that out of the way, let’s begin. Go to System. ecobee Support; Thermostats; Thermostat Installation & Wiring Diagrams; SmartThermostat with voice control and ecobee4 Wiring Diagrams The following wiring diagrams are for the SmartThermostat with voice control and ecobee4 thermostats and common HVAC equipment configurations.. AC Overcool to Dehumidify. Click Settings > Preferences > Hold Action, then choose Until the next scheduled activity. The thermostat will activate your AC to try and bring the humidity down, but it will only lower your temperature to 70F (to match up with the 5F AC Overcool Max value.). This feature will use your air conditioner to lower the indoor humidity to keep you cool and comfortable if you don’t have a dehumidifier. ... You can also control staging by using advanced setting options. Pick AC OVERCOOL MAX; This threshold setting can be accessed and configured by going to the desired humidifying point: Go to MAIN MENU; Select SYSTEM; Choose DEHUMIDIFY USING AC; Select ENABLE; Select your preferred humidity level. There are several times when A/C turned on when it reached 72F instead of the expected temp of 73F. In my case, this did not occur, because I had the Compressor Minimum On Time of 10 minutes (default is 5 minutes). Here's what the tech support told me to confirm the behavior you're seeing (emphasis mine): The 'dehumidify using AC' option works under two different conditions. ecobee thermostats are optimized for use with multistage heating and cooling equipment. Every ecobee, going all the way back to the original "ecobee Smart" thermostat has the capacity to dehumidify using "AC overcool". And in the bottom-right corner is the System Monitor, which shows you what times your HVAC system ran, what the temperature was set to, and what the outside temperature was at the time. Get Started Learn how to get your new ecobee Thermostat up … I tried this feature to address humidity in my house last summer. DON’T!!! So the Ecobee requires external 24v to provide power. If you have a variable speed air handler it works much better. Robust staging options. Get in touch with our support team. Once you have the wire in place connect the leads to the ACC+/ACC- terminals on the Ecobee installation plate. Press Menu on the main screen. While it is not a substitute for a dehumidifier, it helps to decrease the humidity level in your home by continuing to run your cooling beyond your comfort setting. For example, if max overcool temp is 1.5F, and cooling differential temp is 1F, and cool setpoint is 72F, then cooling could turn on if humidity exceeds threshold when temperature is above 71.5F? A few hours later I noticed that the house is warming up the fan is still running. Supports two-stage heating and cooling. Before I explain those conditions, know that the setting to determine how far below the Cool Set Point this option will go is determined by the temperature value you assign to 'AC Overcool Max' in the Thresholds menu. So for those cases, it might be a good feature to have if the thermostat can turn on the A/C and overcool. This article applies to all ecobee thermostats except Smart, Smart SI, EMS and EMS SI. We have ours set to On - 60%, the overcool max set at 2°C, it should only cool beyond the cool set-point to dehumidify when ecobee is already calling for cooling and the humidity is above your chosen value - so if our humidity was 61% but already below cool set-point nothing would happen (I suppose we’d need a dehumidifier added to achieve that). Most homeowners don’t realize that your air conditioner actually has two responsibilities: to cool and dehumidify your home.. This can be … ONLY use the fan on auto mode in humid summer conditions or you will never get humidity levels to stabilize. Switch+. If it turns on the AC when humidity is above the threshold, and turn it off as soon as it goes below it, then this would be a really bad implementation. Next, on this threshold page specify how many degrees your A/C system should overcool the home. I am currently having a whole home dehumidifier added to my ecobee system. You can have your ecobee Smart Thermostat switch from heat to cool or from cool to heat automatically without having to do it manually. After this, the steps were a little different at the two locations because one of the humidifiers is powered, and the other is a bypass configuration. Why is any of that important? Dry mode on an AC is the setting that turns on the dehumidifying function of an air conditioner to reduce excess humidity in the air. This I would need to see a concrete example of. For this typical dehumidification function using the system you would select Menu>Installation Settings>Dehumidifer >1 Wire ACC+>Open contact state to activate dehumidifier. However, at one point I had another issue and took the opportunity to ask the second tech about the ac overcool function and they offered a different answer. So, for example, if the temperature in your house is 73F and the humidity is above your humidity set point, your thermostat will run your AC until your house drops 3F to 70F and then regardless if the humidity set point has been reached or not, the AC will stop so it will not overcool your house more than you have specified. As a result the feature is useless. Even a low 5 minutes every hour threshold will let humidity levels rise. The first condition in which 'dehumidify using AC' will activate is if there is a call for cooling and your humidity need to be lowered to meet your humidity set point (set in Main Menu -> System -> Dehumidify using AC). This is a trade-off that I am trying to work out. 1-wire accessories terminate at the ACC+ terminal on the ecobee, and utilize an existing 24V power source from the HVAC equipment to send the signal for the accessory to turn on. For example, "dehumidify using AC" UPDATE: when the dehumidifier accessory is properly hooked up, the “dehumidify using AC” option is replaced with simply “dehumidify” I think they need to include the differential temp into the logic so that the dehumidification is not triggered on temperatures too close to the max overcool temperature. Platform information: Hardware: RaspberryPi 2B OS: OpenhabianPi Java Runtime Environment: openHAB version: Latest as of data of post For starters I have everything configured properly in the items file and communications to the Ecobee API is working fine. back on using the master switch or at the circuit breaker box. ecobee knows this is the case, and one of the main functions of the room sensors is to allow the thermostat to average the temperature in your house to try and combat those hot and cold spots. – My heating system is a forced hot water boiler system and I am using Ecobee thermostats so your results may vary depending on the type of heating system you have in your home. Press question mark to learn the rest of the keyboard shortcuts. TIP If the thermostat ‘rocks’ or is not flush with the wall, be sure the excess wires are pushed all the way into the wall. The 24V power will come from the Rc or Rh terminal depending on the configuration and model of the thermostat. Since yesterday, the dew point has risen to 68-70F, and I had to turn off the fan circulation because indoor humidity has been reaching 65% in the room. My question is should I turn some things off on my HVAC settings. The BIGGEST issue I seem to see in forums is people in humid areas putting their fans on anything except auto. Commercial Thermostats (EMS, EMS Si) Legacy Products (SMART, Smart Si) Purchasing & Shipping. Fortunately, there is indeed a way: Head to the Ecobee site and sign into your account. How do I lower the humidity on my ecobee? Overcooling is not practical. With the z-wave thermostat and humidity sensors, it should be possible to run a Rule Machine automation to achieve the same effect. I saw this very easily on the usage graphs and had some conversations with tech support. Here is the CSV for last night. Max Cool was set to 1.5F. A subreddit for ecobee and all their smart home products. I have one stage air conditioner, but it has 2 speed modes, the first one runs for 15 minutes with lower fan speed, and then the higher fan speed kicks in. It will stop once it reaches your overcool max setting or until the humidity set point is reached - whichever occurs first. Mini Split and Window AC Integration; Flair App can also connect the window AC and/or mini-split with your Ecobee … Supports two-stage heating and cooling ecobee thermostats are optimized for one or two-stage heating and cooling equipment. My guess is the confusion comes from this happening in the background - also relative to a number of other restrictive settings. By enabling this threshold, your air conditioning system will overcool your home. AC Overcool to Dehumidify. Max Outdoor Temperature: Allows you to … In the upper-right corner is Home Efficiency, which compares how well your home retains thermal energy compared to other homes in your state using data from other Ecobee owners. Next you will want to set your desired humidity point. Documentation. The second condition in which 'dehumidify using AC' will activate is if the humidity level is above your humidity set point and there is no call for cooling due to your temperature being below your Cooling Set Point of 75F. I haven't seen any other thermostat with that function built in. The AC overcool feature doesn't work as advertised and as a result is actually counter-productive because it is absolutely activated by humidity alone. Is it minimum of 2%, or 4%? In its current form it will short-cycle the ac right at the bottom of your ac overcool set point and never run long enough to actually get moisture to drain out of your condensate line.