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Inkbird ITC-308 Digital Temperature Controller Outlet Thermostat Plug, 2-Stage Outlet Heating and Cooling Mode 1100w, w/Sensor Greenhouse Incubator Brewing Fermentation Reptile

4.6 out of 5 stars 3,467 ratings
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Purchase options and add-ons

Brand Inkbird
Product Dimensions 19D x 8.7W x 10.5H Centimetres
Controller type Push Button
Special feature Fan Control
Specific uses for product Air Conditioner
Temperature Control Type Digital Heating and Cooling
Power source Corded Electric
Item weight 0.35 Kilograms
Voltage 120 Volts
Material Acrylonitrile Butadiene Styrene (ABS)

About this item

  • [Dual Relay Output]: Heating/Cooling differential function could be set separately for refrigeration and heating to protect temperature controller from violent change
  • [Dual Display Window]: Be able to display measured temperature and set temperature at the same time.It can control heater and chiller together
  • [Plug-n-Play Thermostat Reading]: Supports Centigrade and Fahrenheit switching,programable,easy to use
  • [Alarm]: When Over-temperature and sensor fault, out of High and low temperature set value,it will alarm
  • [Multipurpose]: Max Current:10A.Can be used for homebrewing,greenhouse,meat/cheese making,reptile and so on
› See more product details

Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3.05 x 6.6 x 17.02 cm; 350 g
  • Date First Available ‏ : ‎ Aug. 17 2015
  • Manufacturer ‏ : ‎ Inkbird Tech
  • Place of Business ‏ : ‎ Shenzhen, Guangdong 518000,CN
  • ASIN ‏ : ‎ B011296704
  • Item model number ‏ : ‎ ITC-308
  • Customer Reviews:
    4.6 out of 5 stars 3,467 ratings
Safety and product resources
Safety documents

From the brand

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  2. INKBIRD is a smart IoT technology company and its business was established in 2010. As a high-tech company, INKBIRD has been devoting itself to offering its worldwide users excellent smart home living products, since the date it was established.

    INKBIRD believes that premium products constructed with smart technology and close to life could help each person lead a free and progressing life like a flying bird.

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Product Description

inkbird thermostat with high low temp alarm to control the heating mat fridge hydronic radiator

Inkbird Digital Thermostat with Temperature Sensor to Control the Heating Cooling Devices ON OFF, Temp Alarm 1100W 10A

Home Brewing Beer Fermentating Temperature Controller Dual Relays Outlet Plug and Play, Reptile Incubator Temp Control

  • Dual relays output which supports control heating and cooling devices ON/OFF automatically at the same time.
  • Plug and play,easy to program.The thermostat will save all settings even it was power outage.
  • Compressor delay protection,avoiding frequent on or off of the refrigerator.
  • Widely be used in indoor grow room,beer fermentation chamber,kegerator,wine homebrew,heater and fan,vegetable tent,gardern plants, snake rack, reptile incubator,curing meat and so on to maintain a stable temperature environment.

Working Principle：

  • eg.Set TS=28 ,CD=2,HD=1,then
  • when measured temp is ≥ to 30(TS+CD),system enters refrigeration status;when temp decline to 28 (TS), stop refrigeration.
  • when measured temperature is ≤ to 27(TS- HD)system enters heating status;when temp decline to 28 (TS),stop heating.
  • And the environment will be kept within 27-30 degrees.
  • If you want it alarm at 20 degree,please set AL=20

Package Content

  • 1*ITC-308 Thermostat with Temperature Senor
  • 1*Manual
  • 1*Card
Temperature Range -50~120°C/-58~248°F; Probe waterproof rating: IP68; Temp Accuracy: ±1°C (-50~70°C) / ±2°F (-58~160°F)
Function High and low temperature alarm; Sensor fault alarm; Temperature Calibration
Easy to use Programmable, control heater and cooler ON or OFF automatically; Easy to set up; Display the measuring and set temp at the same time distantly.
Mutiple usage The ITC-308 thermostat usually be used for home brewing, sous vide, chest freezer, slow cooker, greenhouse, Hedgehog habitat, electric heater, etc. to keep in the constantly temperature range.
Power Input Power: 100 ~240VAC, 50Hz/60Hz; Temperature Control Output: Max. 10A, 100V ~240V AC
Temperature Controller
digital thermostat homebrewer sous vide control grow room plant to keep a stable temp environment
ITC-308 WIFI Thermostat
ITC-306T Heater Thermostat
ITC-308S Aquarium Temperature Controller
ITC-608T Temperature and Humidity Controller
Thermostat ITC-308+IHC-200 Humidistat Combination
Kombucha Heat Pad
Buying Options
Buying Options
Customer Reviews
4.5 out of 5 stars 518
4.3 out of 5 stars 450
4.6 out of 5 stars 23
4.2 out of 5 stars 117
4.6 out of 5 stars 983
4.1 out of 5 stars 25
Temp/Humidity Range -40100°/-40212° -5099°/-58210° -40100°/-40212° ձ𳾱:-40°100°/-40°212°;ܳ徱ٲ:599% ձ𳾱:-50120°/-58248°;ܳ徱ٲ:599% 122℉/50℃
Alarm High and low Temp Alarm no data High and low Temperature Alarm High/low Temp/Humidity Alarm High and low Temperature / Humidity Alarm no data
Senor Temperature Sensor Temperature Probe Aquarium Temp Sensor Tempertuare and humidity porbe Humidity and temp sensor no data
Timer 24 Hours Timer Day and night Timer no data 12 Periods Timer Function. no data no data
Others WIFI Connection Only control heaters Be designed for salt water tank. Supports control temperature and humidity devices at the same time or separately. no data no data

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Customer reviews

4.6 out of 5 stars
3,467 global ratings

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Customers say

Customers like the functionality, quality, and ease of use of the thermostat. They mention it works well for controlling water temperature in salt water tanks, maintains a temperature for both cooling and heating, and is well calibrated at the factory. Customers also appreciate the accuracy, saying it appears to have precise enough settings to suit just about any task. They also say it's a great device for sous-vide kitchen experiments, perfect for a homebrew system on a fridge/freezer, and has a great appearance.

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FunctionalityQualityEase of useAccuracyHome useAppearance
353 customers mention "Functionality"334 positive19 negative

Customers like the functionality of the product. They mention it works fantastic, is flawless, and works well for controlling water temperature in their salt water tanks. Some say it's a good control device, but some times they have to recalibrate it.

&ܴdz;...’s easy to set up and works perfectly for controlling temperature in my reptile tank...." Read more

"...for 1 hour to keep the contents above 8°C. This little unit works perfectly!..." Read more

"I have owned this for over 4 years and it has been flawless. Used it in my garage to maintain a temperature for both cooling and heating...." Read more

"It is fully functioning since I've modified a beer keg chiller in my restaurant by myself a week ago...." Read more

151 customers mention "Quality"132 positive19 negative

Customers like the quality of the thermostat. They mention it keeps the temperature exactly in the range they have specified, keeps animal enclosures heated, and has the option to set a maximum and minimum temperature. Customers also appreciate the digital temperature gauge. They also mention the product keeps the water above freezing.

&ܴdz;...’s reliable and has helped me maintain precise temperature control. Highly recommend this product for anyone needing temperature regulation!" Read more

"...Overall 10/10: perfect little heating controller for light loads; I would not personally run a heating load all the way up to 10A on this unit, it..." Read more

"...Used it in my garage to maintain a temperature for both cooling and heating. You can set temo range and alerts for any extreme temp changes." Read more

"...beer keg chiller became like a modernized machine with its digital temperature gauge." Read more

140 customers mention "Ease of use"117 positive23 negative

Customers find the product easy to use. They mention it's super easy to set up, recalibration is easy, and there are many great videos online on how to use it.

"This temperature controller is a game-changer! It’s easy to set up and works perfectly for controlling temperature in my reptile tank...." Read more

"...Simple and easy to use, take a look on YouTube for a video example: it will take you 2-3 minutes to set this up to do whatever it is you need...." Read more

"...So 5 Stars for Service n it is great device instructions hard to follow." Read more

"...The controllers are solidly built. The controllers are easy to set up, with many options available...." Read more

33 customers mention "Accuracy"27 positive6 negative

Customers like the accuracy of the thermostat. They mention it's well calibrated at the factory, has precise enough settings to suit just about any task, and is easy to setup and use.

"...The controller has kept both aquarium temperatures stable and accurate...." Read more

"Easy to use and accurate" Read more

"Accurate Great value" Read more

"So simple and accurate. I used it to turn a small chest freezer into a fridge...." Read more

26 customers mention "Home use"26 positive0 negative

Customers like the product for its home use. They mention it's a great device for sous vide kitchen experiments, perfect for a homebrew system on a fridge/freezer, and a nice item to have with hydroponics. Some say it's ideal for small chickens or woodstove fans.

"...two plugs, one for a chiller and one for a heater which is perfect for environments where both are required...." Read more

"Made diy incubator. In 1 of the snake tanks and Small diy green house for heater" Read more

"Works great set cooling and heating temp. Using in hydroponics room" Read more

"It is a nice Item to have with Hydroponics, it is a shame they are not all WIFI enabled and easy to setup with an APP as this one you need to..." Read more

9 customers mention "Appearance"9 positive0 negative

Customers like the appearance of the product. They mention it's very nice, has a good display, and is a cool gadget that could be used for many different purposes.

"This is a very cool gadget that could be used for many different applications...." Read more

"I arrived the product and it looks good but it will be used in a month so I don't know if it works yet" Read more

"Easily programmable thermostat settings. Very accurate readings, and good design. Buy this now if you're thinking about it." Read more

"Nifty little unit. 5 minutes with the instructions for all the abreviations and your set and ready to rock" Read more

It works good and even it appears a modernized looking.
5 out of 5 stars
It works good and even it appears a modernized looking.
It is fully functioning since I've modified a beer keg chiller in my restaurant by myself a week ago. Due to its unavailability of the original thermostat, I just removed it and then put this external device. Now my beer keg chiller became like a modernized machine with its digital temperature gauge.
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Top reviews from Canada

  • Bryan
    5.0 out of 5 stars Works great as a board for a mini fridge !!
    Reviewed in Canada on March 31, 2025
    Verified Purchase
    Love this thing !!
    My son bought a used red bull mini fridge - the guy that had it before had blown the control board - so I needed a temp controller with sensor and something to trigger the compressor … and this does the trick perfectly at a really cheap price !!

    I disassembled the outlet dongle and stripped the wires - redid all necessary connections - this thing rocks. It’s small enough that I was able to fit it back into the original connection box. Set temp at 3.5C with a cooling diff of 1.1C and a compressor delay of 7min.

    Do note that if you set a compressor timeout value - upon plugging in the unit - it’ll count down the default value BEFORE triggering the compressor. That threw me off as I wasn’t getting any voltage until I figured it out.

    Don’t think we could’ve repaired the board and in any case it would’ve been extremely expensive assuming we could’ve found the necessary components …
    2 people found this helpful
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  • radioguy
    5.0 out of 5 stars Does the job
    Reviewed in Canada on May 24, 2025
    Verified Purchase
    Works good
    Helpful
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  • Blackhole
    5.0 out of 5 stars It works good and even it appears a modernized looking.
    Reviewed in Canada on April 19, 2025
    Verified Purchase
    It is fully functioning since I've modified a beer keg chiller in my restaurant by myself a week ago. Due to its unavailability of the original thermostat, I just removed it and then put this external device. Now my beer keg chiller became like a modernized machine with its digital temperature gauge.
    Customer image
    Blackhole
    5.0 out of 5 stars
    It works good and even it appears a modernized looking.

    Reviewed in Canada on April 19, 2025
    It is fully functioning since I've modified a beer keg chiller in my restaurant by myself a week ago. Due to its unavailability of the original thermostat, I just removed it and then put this external device. Now my beer keg chiller became like a modernized machine with its digital temperature gauge.
    Images in this review
    Customer imageCustomer image
    Helpful
     Report
  • Sabine
    4.0 out of 5 stars Display improvements needed
    Reviewed in Canada on May 28, 2025
    Verified Purchase
    My only complaint is that it is impossible to read the display in daylight. If I want to make any changes to my greenhouse setup I have to do it after dark.
    Otherwise it works great
    Helpful
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  • Marisa L.
    5.0 out of 5 stars 4 years going strong
    Reviewed in Canada on April 13, 2025
    Verified Purchase
    I have owned this for over 4 years and it has been flawless. Used it in my garage to maintain a temperature for both cooling and heating. You can set temo range and alerts for any extreme temp changes.
    Helpful
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  • Jedibear
    5.0 out of 5 stars value
    Reviewed in Canada on April 29, 2025
    Verified Purchase
    value
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  • Justin Davidow
    5.0 out of 5 stars Great temperature controlled outlet!
    Reviewed in Canada on November 2, 2023
    Verified Purchase
    I've been on the hunt for a simple IFTTT controllable 10A outlet with a built-in temperature sensor, that is able to send threshold alarms and enable / disable the outlet.

    I have not found a solution for anywhere near the price of this unit.

    Simple and easy to use, take a look on YouTube for a video example: it will take you 2-3 minutes to set this up to do whatever it is you need.

    In my case, I built a highly insulated shed that needs a 500W heater turned on 1-4 times per day (based on the outdoor temperature / overall heatloss!) for 1 hour to keep the contents above 8°C. This little unit works perfectly!

    The unit did need temperature calibration out of the box, it was reading exactly 1.0°C high, but the unit allows easy compensation to read accurately. The thermocouple does have quite a bit of thermal mass bonded to it, in my use case that's fine: I want the mass of the sensor to lag the actual air temperature by a few seconds / minutes to help average out the indoor space temp.

    Overall 10/10: perfect little heating controller for light loads; I would not personally run a heating load all the way up to 10A on this unit, it just doesn't have the mass to support such a claim. I'm sure it can _technically_ do 10A for short periods, but to prevent any risks or issues, I'd absolutely keep the load under 6-7A resistive loads max. If you're trying to run a (not remotely rated for!) 120VAC 1.5kW heater on this thing: you're going to melt it for sure.
    6 people found this helpful
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  • cliff
    5.0 out of 5 stars So far so good.
    Reviewed in Canada on March 27, 2025
    Verified Purchase
    Purchased to monitor the temperature in our hedgehogs cage. So far it seems to be functioning well.
    Customer image
    cliff
    5.0 out of 5 stars
    So far so good.

    Reviewed in Canada on March 27, 2025
    Purchased to monitor the temperature in our hedgehogs cage. So far it seems to be functioning well.
    Images in this review
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Top reviews from other countries

Translate all reviews to English
  • Purgandi Dracointerfectorem
    5.0 out of 5 stars Quality & easy to use: for microgreens, mushrooms, indoor grows & even pet hospice.
    Reviewed in the United States on November 17, 2016
    Verified Purchase
    Update 2: 2.5 yrs and still going strong. I see that it is a better deal, now, too!
    Update: 8 mo & going strong! I now have an emotional attachment to this product as it allowed me to keep my elderly, 19 yr old cat safely comfortable at home when she reached the end of her days & she could no longer maintain her body temperature without help. I was able to set this up for her & still get some sleep, & was able leave the house as needed with everything running, without the concern that unregulated devices would cause. Without it, I would have been strongly compelled to bring my cat in to put her down, & given how much she hates the vet that is the last that I would have wanted for her final hours. Instead, she was bedded down in a box so she felt safe, and this Inkbird kept her temperature in the best range. That allowed us to focus on other things, like her favorite sounds and scents, so we could surround her with all that extra goodness and love. I never expected to use the device this way, and now I'm forever grateful for it. She is missed terribly; the memories of how we were able to tend her and give her the most comfortable and peaceful ending are now our comfort in that grief. Thank you, Inkbird Tech. That cat grew up with my children, saw me through recovery from 3 major surgeries and was such a wonderful being and match for us in more ways that I can relate, here. She deserved this, you made it possible, and I hope that you read these reviews from time to time so that you see this, too. Thank you. Thank you.
    --------------------
    Initial unedited review: This product has been in use for 4 months, to monitor and control the temperature for petri dishes, seed starting, and plant growth. It would be useful for those doing hydroponics, aquaponics, raising fungi, using a greenhouse, or heating and cooling a space for humans and/or pets. I've been very pleased with all applications that I have tried. The set-up for this product is amazingly easy. It will display in F or C, whichever you set. The desired temperature as well as the acceptable range are programmed as you like, so this is completely customized. The product has been reliably turning on and off the heating and cooling as needed, and has not allowed the temperature to get out of the set range that I programmed, ever. This is monitored with a different device, and it has been accurate. It has taken a while for it to gain my trust, as I am cautious with anything of this nature. First I turned over the controls while sleeping. Now I use this all the time, even if I leave the house. I do not allow a simple timer to do that with a heating device; since this one ensures a set range, that is safer. I also use a heater that also has it's own automatic shut-off. On it's own, my heater would go higher than the range that I required, though it would not continue up into an unsafe range (it could kill some plants, and dry things out). It is important to layer these safety features and use trustworthy appliances.

    The display on this device is simple and thoughtful. The bright LED display is large; I love the convenience of the display, as I can read it across the room. It is bright enough to be clearly visible in strong light or in darkness, and every light level in between. Sweet! (I wear corrective lenses, these put my vision into the normal range). It displays both the desired temperature that you set, and the temperature that is being read. It has been showing two digits and one decimal, as well as either the C or F units. The range on the label indicates -58 to 210 F / -50 to 99.9 C. I have not had the occasion to measure triple digit or negative temperatures so I cannot tell you how the display would behave in those conditions.

    This device has a devoted cord with a generous length (I'd estimate 5 feet, have not measured this). A second, short cord provides two clearly labeled, 3-prong outlets that allow you to plug in one heating device and one cooling device. It will function with devices that have only 2-prongs, and it will function whether you have attached devices, or not. Of course, without any devices it cannot alter the temperature, and so it would simply function as a thermometer. If you have set a temperature range under those conditions, you would hear it click to attempt to turn on a device, and it would continue to try to do so. I do not know if that would affect the life of the device, and so I recommend that if you decide to use it in this way that you set a large enough temperature range that it is not clicking. A person might decide to do that for the benefit of this display, that has better visibility than any thermometer that I have ever seen. The thermostat probe/sensor is on a slender cord that is several feet long (I haven't measured it- looks like 4 or 5 feet), and allows you to monitor temperature inside a closed container, while keeping the device outside of that container. It could monitor the temperature outside by running the sensor outside of a window or door (assuming that your weather-stripping will allow you to do this without damaging the cord).

    The display housing is molded, heavy-duty plastic, and can be hung up on a nail. The hole that allows you to do this is visible in the picture. It is thinner plastic, and extends along the back edge, so your nail does not need to be terribly long. The plastic with that hole does not swivel, and over time plastic can become brittle. If you want to be able to turn this while it is hung up, then you'll need to hang it onto something that will give you that option without undo pressure that could crack the plastic. The plug that is used to attach the heating and cooling devices also accommodates being hung up onto a nail.

    The buttons used to set the device are sealed under the label, so moisture and particulates cannot get in there. The entire housing is well protected that way (if you are considering outdoor use, you'd best look into whether that is recommended. I use this inside). The plastic is quite smooth. When you push a button there is an audible click for feedback that you have done so. Buttons need to be held down for a few seconds. Because of that, it is unlikely that any accidental pressing would initiate any program changes.

    Accessibility: The buttons are widely spaced; those with large fingers will have no problem. You do need to be able to hold down the buttons for a few seconds. It doesn't take much strength to do that; it does take a degree of steadiness. It is easy to operate this with one hand, by cradling it in the fingers and using the thumb on that same hand for the controls. If that isn't workable, yet you could hold it and use the opposite elbow, that definitely works. (Yes, I tried it!). It wouldn't be entirely impossible to set this up without being able to hold it, and if that is something that you need to do then you would need to consider how you will secure this device into position while you are doing so. The molded hole for hanging this up would not hold up to that sort of treatment, and all of the cords are dedicated (not removable) so those need to be accommodated in the arrangement. If this can be set up and you do not need to change it for your own purposes, then it can be set and just left. It has not timed out, required a re-set or anything like that. Those with low vision may find that this display is quite workable for them. The large size, great contrast and brightness are all in favor of that. There may be those who are able to take the readings just fine, though require help to set this up, as reading the directions and the labels on the outlets for the appliances could be difficult or unworkable with limited vision. Once set up, this can be left alone unless you are going to require changes. If visual issues are a concern, then be sure to check the current return policy, just in case, and know that if you have some vision then there is a good chance of this working out.

    More technical stuff: Input and output are labeled the same: 100 - 265 VAC, 50 Hz - 60 Hz. Current: 10A max. CE, FC, ROHS.

    I paid full retail price for this product, and have no interest, relationship, blog, or profit in the sale of this item. I'm a happy customer, period. I hope that this review is helpful to you as you're making your decisions. Enjoy your shopping!
    Report
  • Carlos T
    5.0 out of 5 stars Excelente control de temperatura para home brewing.
    Reviewed in Mexico on August 21, 2017
    Verified Purchase
    Excelente, necesitas un control de temperatura fácil de usar? Este es. Yo lo uso para home brewing y funciona de maravilla, fácil de programar, el termómetro es largo y lo puedes meter a la olla de agua caliente, muy útil para mashing. Puedes conectar fuentes de frío y calor al mismo tiempo así que es muy bueno para controlar la temperatura de fermentado (pienso comprar otro para eso). 鶹 prime excelente con un pago extrañen llego al día siguiente. Muy satisfecho con la compra.
    Customer image
    Carlos T
    5.0 out of 5 stars
    Excelente control de temperatura para home brewing.

    Reviewed in Mexico on August 21, 2017
    Excelente, necesitas un control de temperatura fácil de usar? Este es. Yo lo uso para home brewing y funciona de maravilla, fácil de programar, el termómetro es largo y lo puedes meter a la olla de agua caliente, muy útil para mashing. Puedes conectar fuentes de frío y calor al mismo tiempo así que es muy bueno para controlar la temperatura de fermentado (pienso comprar otro para eso). 鶹 prime excelente con un pago extrañen llego al día siguiente. Muy satisfecho con la compra.
    Images in this review
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    Report
  • Bernardo Flores
    5.0 out of 5 stars Buen producto
    Reviewed in Mexico on October 5, 2022
    Verified Purchase
    Me ha servido mucho para controlar la temperatura de la fermentación de cerveza. Además, aunque siempre lo cuido, ha soportado agua, polvo y sol del exterior.
    Report
  • ManOfManyInterests
    5.0 out of 5 stars I couldn't be happier!!
    Reviewed in the United States on March 3, 2017
    Verified Purchase
    I have been looking for something like this for years. I had no idea it existed until I ran across it in a lightning deal.

    Anyways, coffee tables and couches obscure the 2 heating vents in my living room. I have fans in front of them to "boost" the air flow from under the coffee tables because all I am doing is heating up the coffee tables when the heat runs without them. The problem has been that I have to leave the fans running 24/7 so that I can get the heat from under the tables. The flip side of this is that I also get some undesired cooler air when the heat is not running because the fans never shut off and I have an annoying breeze when the heat isn't running.

    Enter the Inkbird thingy here. I plugged the fans up to a splitter and then into this gizmo and set the cooler temp to 85 degrees. Now the fans only run when the furnace runs!!!! I have considered other way more expensive solutions to this problem before trying this but this is by far the cheapest way to fix my problem AND I have discovered that my heat is actually running less since with this thing and I don't have to deal with the continuous annoying breeze from the fans when the heat is off!!! I also think that the Inkbird will actually pay for itself in a couple of months since my furnace is running about 30% less!!!

    **REVISED REVIEW A COUPLE OF YEARS LATER**

    I have moved on to a new house. The master bedroom is the farthest room from the furnace. It doesn't seem to get as warm as the rest of the house even after playing with closing vents in other rooms. I pulled out the inkbird from the old house and set it up with an electric fireplace heater blower I rigged up in a box that I put over a heating vent and my problems are solved again. As soon as the heat in the furnace duct hits 90 degrees the inkbird turns on the fan and it sucks the heat thru the vent and out into the room. I am able to increase the temperature in the room by about 3 to 5 degrees by varying the temperature on the inkbird. The lower I set the temperature on the inkbird, the longer the run time I get. This little setup has changed the airflow coming out of the register from a trickle to the equivalent of having a powerful plug in heater in the room.

    The best part is that the inkbird along with the electric fireplace fan only pull about 33 watts of electricity when running as compared to about 1200 watts from a heater. I use about 1.9 kwh of electricity a week with this setup as measured thru a smart plug. This means that I use less than 25 cents a week or $1/month to boost the heat to my master bedroom using the inkbird and the fan. The Dyson hot/cool heater that I had rigged up thru a kill o watt measuring device used roughly 75 cents of electricity in 1 day to heat the same space and the Dyson hot/cool heater is one of the most energy efficient heaters on the market. Now if you figure the daily rate of 75 cents and multiply that over 30.4 days per month on average you get $22.80/month to run the heater. The inkbird and fan cost $1/month to get the same result.

    If it would stay cold all year, it would cost $12/year to run the inkbird/fan combo. It would cost $274 to run the heater. This is a savings of $262 per year.It doesn't so YMMV.

    BUT...

    I can also use this setup during the summertime to boost the a/c flow coming out of the vents. :)
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  • Mister T
    5.0 out of 5 stars Great value, well constructed
    Reviewed in the United States on December 6, 2024
    Verified Purchase
    I am very pleased with this device. Purchased to convert a mini (3ft tall) refrigerator into a wine cooler. Set for 54 degree F with 1 degree cooling differential (on at 55F, off at 54F). Not using the heating option. In practice, the probe indicates the temperature overshoots after turning off at 54F, dropping to around 52F. This is due to the nature of the refrigerator’s thermal mass/lag and not a controller issue. This over-shoot is air temperature only and typical of most refrigerators. Separate measurement shows a steady 53F of liquid (wine) near bottom of fridge – perfect.
    I recommend the probe be in air, not tight to wall or any container. I also recommend setting the compressor delay to at least 1 minute (the minimum). Most of the time this is irrelevant (typical cycle is on about 8 minutes, off for 90 minutes or so). But if there is a momentary power interruption while the compressor is active, the delay will activate and help protect the compressor.
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