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[lasor1]

Hello got my water to air exchanger installed today. I notice it ristricts a lot of airflow it is same size as duct off of air handler. I heard you can turn the fan up how would a person do that I have a rhudd air handler thanks for the info!

[Scott7m]

Some of them are 3 speed, some aren't.  I usually don't put a coil in that totally blocks of the entire duct, it dont hurt a thing to have an air gap so u dnt lose flow

Some fans are 3 speed

[yoderheating]

Allowing air to bypass a coil will make it inefficient because the fan will have to run longer to move the same amount of BTU's. The best option is to oversize the coil and rework the existing duck work.

[lasor1]

Thx for info it is a little bigger than duct work

[Scott7m]

The fan may run a minute or two longer because of the longer but it's no big deal, a good thing is that it lowers the delta t.

The slickest way I've seen of doing it is to put a close t in the loop by the exchanger with a smll pump that only kicks on when the furnace is calling for heat, the main pump on the stove runs 24/7.   You then set the blower on the fan to run at low speed 24/7, it takes less wood and is far more comfy to have the air circulating in the house at all times, fans use little juice,and most of what they use is when thry are coming up to speed.

[yoderheating]

 It would be interesting to see what a fan would take to run 24/7. I imagine it would take more than the average customer would want to pay.

[RSI]

Could easily check it with a clamp on amp meter. I never have but I always guessed they take around 500 watts.

[Scott7m]

On low I don't think it would take 500, they are so quiet on low that inside the home you can't even hear them on low

I feel it's just as important selling customers something that's comfortable, a fan on low probably wouldn't cost 10-15 a month.  But the comfort goes way up, when the sir is always circulating the heat ain't always rushing to the top of the room and it's much more consistent, efficient.  By the air always moving we've found it takes less btu's than simply the hest rising to the top, so in terms of what it cost, not much, especially if it saves a bit of wood