Convection fan on Alaska 140

gumptruck · Post by **gumptruck** » Wed. Mar. 04, 2020 1:53 pm

I have a older 140 one burner. Hooked up to ductwork going into hot air. cold air return hooked up to convection fan to pull. Problem is convection cools air to 120 degrees then when it reaches registers only ninety; I can unplug blower and get plenum to 220 then plug blower in then circulates warmer air. tried putting fan limit switch but only goes up to 150 on. is there a timer I can use or switch in plenum to turn blower on at higher temp and off at certain temp. ductwork cold at middle to end registers

CoalKracker · Post by **CoalKracker** » Wed. Mar. 04, 2020 8:10 pm

How many feet of ductwork are you pumping into?

gumptruck · Post by **gumptruck** » Wed. Mar. 04, 2020 8:33 pm

10 ft truck runs into fifty ft straight trunkline with7 round take offs. rancher

McGiever · Post by **McGiever** » Wed. Mar. 04, 2020 10:40 pm

What is temp of return air going into convection fan?

CoalKracker · Post by **CoalKracker** » Thu. Mar. 05, 2020 10:10 am

Thats a lot of duct to be pushing through with your size stove. You will be losing a decent amount of heat with a run like that. I think they were only around 80k btu for the single feeds. Using a limit switch will give you an average of less heat throughout your house vs letting the blower constantly run. You will be losing your heat off of your stove and into that one room it sits in while waiting for your plenum to heat up and your fan to kick on. Not to mention the whole time the fan is not on you are not getting any heat at all through your vents into the rooms. I would think that on average in 24 hours you will have more heat at a more consistant temperature in all of your rooms if you leave your blower on all the time. If you need more heat then the 140 dual feed might be a better option for you.