I have installed a underfloor heating system that is running off of the tankless hot water system. The heating box is of the closed loop type.
At the moment I have 5 zones being used from the manifold.
The loops are from 200ft to 300ft. of 1/2in pex.
When running one zone, the shortest, the flow meter shows just a little bit better than 1/2 GPM.
This is measured by the flow meter on the Watts manifold.
When opening up another zone the flow goes down to half or less.
I am running about 30psi at the moment, when at first I was at about 15psi and the flow was quite a bit less.
If I open any more zones I don't think I will have any flow at all.
The pump is an Armstrong E9B.
Flow range: 0 to 38gpm
Head range: 0 to 42.4ft.
At the moment I have 5 zones being used from the manifold.
The loops are from 200ft to 300ft. of 1/2in pex.
When running one zone, the shortest, the flow meter shows just a little bit better than 1/2 GPM.
This is measured by the flow meter on the Watts manifold.
When opening up another zone the flow goes down to half or less.
I am running about 30psi at the moment, when at first I was at about 15psi and the flow was quite a bit less.
If I open any more zones I don't think I will have any flow at all.
The pump is an Armstrong E9B.
Flow range: 0 to 38gpm
Head range: 0 to 42.4ft.