In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Radiant in floor question question
I added two rooms to my house and want to put in- floor to heat them. the rooms are 14' X 18' or 252 sq feet, needing roughly 9,000 BTU's of heat. These rooms are one above the other so they would have to have separate pumps. I did the flow calculation of water temperature loss of 20 times 500 and divided that answer into the Btu need and got the flow needed, a little less than one gallon per minute.
I bought the pex and got advice from aqua therm when they were in Brutten MN. They told me to run 1" and a 1/4 copper pipe and put a 007 taco pump on the zone. I feel that will not work properly after learning a little about Hydronic heating from Caleffi's trade journals and on this site..
My thought is to run 3/4 inch copper and put a Wilo variable speed pump on each zone. On one zone I will need to push water down eight feet and hope fully move any air bubbles down also. Minimum flow rate for 3/4 inch copper (based on 2 feet/sec.) is 3.2 GPM. So the flow I need is a lot lower than that so any air will not be pushed down that eight feet , and through the system and removed with an air separator. I am planning on putting a coin vent on the 90 degree fitting going down to get rid of air there if there is a problem.
Question is, am I on the right track? or is there another way to do this?