I've been looking for something like this for many years. I had no idea it existed until I stumbled upon it on a lightning deal. Anyway, the coffee tables and sofas cover 2 air vents in my living room. I have fans in front of them to "boost" airflow under the coffee tables because I only heat up the coffee tables if the heat goes out without them. The problem was that I had to run the fans 24 hours a day, 7 days a week so I could get heat under the tables. The downside to this is that I also unintentionally get colder air when the heat is off because the fans never turn off and I get annoyed with the wind when the heat is off. Enter the Inkbird device here. I connected the fans to the splitter and then to this thing and set the cooler temp to 85 degrees. Now the fans only work when the oven is running! I looked at other options, more expensive solutions to this problem before attempting this but this is by far the cheapest way to solve my problem and I've found my heater to work less with this thing since then and I no need to contend with the constant annoying breeze from the fans when the heating is off! I also think Inkbird will pay for itself in a few months as my oven runs about 30% less! The master bedroom is the room farthest from the stove. It doesn't seem as warm here as the rest of the house, even after playing with the other rooms' vents covered. I pulled an inkwell from an old house and installed it with an electric fireplace heater fan that I built into a box that I tucked over the vent and my problems are solved again. Once the temperature in the furnace duct reaches 90 degrees, the inkwell turns on the fan and sucks the heat out through the vent into the room. I can increase the temperature in a room by about 3-5 degrees by changing the temperature on the Inkbird. The lower I set the temperature on the inkbird, the more runtime I get. This little setup changed the airflow leaving the register from a thin trickle to the equivalent of a powerful space heater. Best of all, the Inkbird, along with the electric fireplace fan, only uses about 33 watts of electricity when running, compared to about 1200 watts from the heater. I use about 1.9 kWh of electricity per week with this setup, measured via a smart plug. That means I spend less than 25 cents a week or $1 a month to heat my master bedroom with an Inkbird and a fan. The Dyson heating/cooling heater I installed with a watt meter used about 75 cents of electricity per day to heat the same space and the Dyson heating/cooling heater is one of the most energy efficient heaters on the market. . Now if you calculate the daily rate of 75 cents and multiply that by an average of 30.4 days per month, you get $22.80 per month to run the heater. An ink bird and a fan cost $1 a month to get the same result. If it stayed cold year round, it would cost $12 a year to run the inkbird and fan combo. The heater costs $274 to run. That's a savings of $262 per year. It's not YMMV. BUT. I can also use this setting in the summer to increase air conditioning airflow from the vents. :)
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