Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
How does one go about determining what kind of main vents to use? What size? How many? I have two on my system now, and am looking to replace them this spring. The current ones are too rusted and corroded to be of much use. Is there some sort of formula to use? I'm an amateur who is learning about the wonders of steam heat.