DIY circulation solution – must be quiet, energy effecient, simple, low cost
This is a continuation of another post but the focus is a bit different so…
I am building a 25×25, two story that will be heated mostly with a centrally located wood stove. The layout is wide open (no partition wall on first floor) so good radiant distribution but with wood heat you get vertical stratification.
I would like to design something fairly simple meaning not a complex system of ducting throught the house.
Seems like it should be not to difficult to build a couple of ducts that simply pull air off the ceiling and vents it out at floor level.
? >> One question is how much air do I need to circulate per hour as a percentage of total cubic footage to be effective in eliminating stratification? Is one air change per hour enough? more? less?
Then I’ll know how to spec my fans.
? >> What is a good solution for a fan to move the air? The considerations are: low power and VERY quiet. (no ceiling fans, they just don’t do the job)
I don’t consider a fan than pulls 100 watts to be low power. I don’t care if it has an Energy Star sticker or not. The house is off-grid so power will be a combo of solar, generator and storage batteries. Especialy when power is coming off the batteries every watt counts.
And I don’t want to hear this thing whinning and rattling away as it will run most of the time.
There are Broan exhaust fans that are rated at 50-80 CFM and operate at .3 sones which is about as quiet as it gets.
Seem like I could duct this fan out to the floor level. (no I’m not talking about using this in a bath. This is to circulate air only and of course I’ll need exhaust in the kitchen and bath areas)
I’ve looked at in-line fans but they never seem to give enough info on power usage or noise levels. If this seems the way to go could you recommend a few options that meet the criteria?
Any reason I couldn’t adapt the exhaust fan to my purposes?
?>> If am outputting air at floor level in a high traffic area will this create an uncomfortable draft? It will be warm air but still a draft.
Looking for a low cost, low energy, quiet DIY solution.
Thanks for any input!