Couple of questions...
1) Does a Knight boiler require a primary/secondary piping installation? If not, what are the alternatives. If so, what are the recommendations?? Any pictures of schematics/patterns??
2) Can I vent the exhaust through PVC and run the PVC up my 2 story chimney, but pipe in the clean air through a shorter pipe just above my basement cement wall? Is it an issue if intake and exhaust pipes are of different lengths and terminate in different locations?
3) Is it true that the higher efficiencies of the Mod/coms can only be achieved if using radient installations? One of the guys giving me an estimate indicated that because I was using baseboard heating, that it was a waste of money buying a mod/com and that I should just get a traditional boiler.