Steam Heat Pipe Insulation?

Aaron Hovel

I have attached two pictures. One of the boiler and the main pipes coming out of the boiler and another of the dry return pipes.
My question is: 1. Where do I start with Insulation? at the point where the pipes leave the furnace. 2. Also do the dry returns need to be insulated as well.

Thank you!

tom_54

At the least...

start where the pipes come out of the boiler and all the way up to the main vents. Include as much of each riser as you can.