Greetings
A lot in the way of introduction... but I think it will help.
Last fall I bought 2 operating Greenhouses at auction... one 30' X 100', one 30 X 50'. The smallest had two gas fired domestic hot water heaters and the largest was part of a large hot water boiler system that served a maintenance building and two greenhouses. I got all that system as well.
The greenhouses had tables/benches 12' X 8' with a center aisle. The smaller one is all we set up this year although we modified it to be 100' X 30'. The tables have 1 1/4 in sched 80 pvc manifolds and a return line. The manifolds feed 1/4 in tubing place about 2 in apart that covers the full top of the table.
Bottom heat. Bottom heat is a good thing for heating the roots of plants in a greenhouse... trust me on this.
We sawsall-ed the manifolds and returns in order to move them. Also cut the tables in half. We have been building this green house all summer... myself and a guy that helps half-days. He had been working at the Greenhouse operation where I bought these, in maintenance and I defer to his expertise on a lot of what we are doing.
The system is closed with a Taco pump (12.5 psi). We used metal coming out of the heaters to 1" CPVC... air bleeders, pressure tank...
We are about to start connecting to the tables... an easy 25' from the heaters. I went to the local Menard's for parts but they stock nothing in 1 1/4" sched 80. I bought a ton of sched 40 connectors to splice everything we had cut... also a few elbows, T's and valves. Enough to get from the sched 80 manifolds and returns to the 1 in CPVC near the heaters.
I know that sched 40 is rated to 140 degrees. My helper says we can't use it because of the extra sunshine and heat in the greenhouse.
I need to keep things moving this week and can't lose a lot of time or money to buy sched 80 fittings. All the little 1/4 in manifold fittings and slices are expensive enough.
The bottom heat will only be operating when temps go below freezing at night and the main greenhouse heaters will be set at 70 degrees. We had planned on running the heaters at 140 degrees... so, similar to conditions in a house. When it starts getting warm in March we won't be bottom heating anymore, much.
We can, obviously cut the temp on the heaters back if that is recommended.
We can, although as mentioned, I would rather not track down 1 1/4" sched 80 pvc fittings.
Thank you in advance for your time and attention...
-Jim
A lot in the way of introduction... but I think it will help.
Last fall I bought 2 operating Greenhouses at auction... one 30' X 100', one 30 X 50'. The smallest had two gas fired domestic hot water heaters and the largest was part of a large hot water boiler system that served a maintenance building and two greenhouses. I got all that system as well.
The greenhouses had tables/benches 12' X 8' with a center aisle. The smaller one is all we set up this year although we modified it to be 100' X 30'. The tables have 1 1/4 in sched 80 pvc manifolds and a return line. The manifolds feed 1/4 in tubing place about 2 in apart that covers the full top of the table.
Bottom heat. Bottom heat is a good thing for heating the roots of plants in a greenhouse... trust me on this.
We sawsall-ed the manifolds and returns in order to move them. Also cut the tables in half. We have been building this green house all summer... myself and a guy that helps half-days. He had been working at the Greenhouse operation where I bought these, in maintenance and I defer to his expertise on a lot of what we are doing.
The system is closed with a Taco pump (12.5 psi). We used metal coming out of the heaters to 1" CPVC... air bleeders, pressure tank...
We are about to start connecting to the tables... an easy 25' from the heaters. I went to the local Menard's for parts but they stock nothing in 1 1/4" sched 80. I bought a ton of sched 40 connectors to splice everything we had cut... also a few elbows, T's and valves. Enough to get from the sched 80 manifolds and returns to the 1 in CPVC near the heaters.
I know that sched 40 is rated to 140 degrees. My helper says we can't use it because of the extra sunshine and heat in the greenhouse.
I need to keep things moving this week and can't lose a lot of time or money to buy sched 80 fittings. All the little 1/4 in manifold fittings and slices are expensive enough.
The bottom heat will only be operating when temps go below freezing at night and the main greenhouse heaters will be set at 70 degrees. We had planned on running the heaters at 140 degrees... so, similar to conditions in a house. When it starts getting warm in March we won't be bottom heating anymore, much.
We can, obviously cut the temp on the heaters back if that is recommended.
We can, although as mentioned, I would rather not track down 1 1/4" sched 80 pvc fittings.
Thank you in advance for your time and attention...
-Jim
