Fosta Pex w/Fintube

MikeyB

Looking to install a Home Run Manifold system w/3/4" fintube, what be be a better option 1/2" Fosta Pex, or go with 3/4" Fosta Pex for each section of fintube, There will be 3 bedrooms and one bathroom, Acording to Slant Fins Heat Loss Explorer the heat loss in btu/hr for each room are, 4509, 3450, 2841, 1272, Thanks for you help guys

hot_rod

small pex

1/2" can move about 1.5 gpm or 15,000 btu at 20 degree delta T.

Heck, 3/8 may be large enough depending on run lengths. Small diameter copper and pex is commonly used for panel radiator runs.



hr

MikeyB

Pex/Fintube

Thanks HR,  I was hoping to install panel rads but have to settle for fintube instead.The runs wont be that long at all, the house is pretty small, I will go with the 1/2" Fosta Pex, Tech Support from Viega metioned that I should use 3/4" Fosta Pex, which I thought was a bit much considering the loads and legth of run

Steve Ebels_3

Love the stuff

We use 1/2" all the time for panel rads and BB zones. 3/4" would only be used if you are feeding a load above 15K or if head was a factor with the smaller diameter.

MikeyB

Fosta pex/fintube

Thanks Steve, I appreciate it. Now it looks like the home run system might get shot down, and just go with a series loop.