I bought an air vent for the new closed loop heating system. (this was Junk)
I bought new Pex pipe with Oxygen barrier for heating systems.
I did not know about this Pex I should have used it from the beginning.
I am going to stub a Tee by my natural gas meter for a future quick connector for my generator.
I found some other people using the same closed loop vent free tankless heater for their fish. 500 gallon tanks in MI it was costing about $10 in NG for a month while keeping the fish tank at a constant temp.
I liked this picture showing ice on the greenhouse with plants in it.