central boiler chimney question

my unit comes with 2 four foot sections (8 ft.) is that enough for a boiler that is placed 100' from the house?

That depends. My boiler is also 100 feet from my house but I have 3 sections. The chimney should be higher than your eves on your roof.

From what I understand, any chimney should have a minimum of 16 feet for proper draw and smoke dispersion. I had a CB before getting my Greenwood and I actually had 5 sections of chimney total. This got me my 16 feet, plus got it over the peak of the roof of my house by more than 2 feet. The unit was 50 feet from my house. The pipe is pricey, but it is worth it to improve combustion and prevent smoke in your house or worse, your neighbors.

Pete

I don't know about New Jersey, but the new regs (March 31) in some states require that the chimney be 2' above any structure within 100 feet.

Most of the CB installations that I've seen have stacks that are 8' or less.

I probably have the worst OWB chimney setup you'll ever see. My boiler is 3' from garage 15' from the house. I can't raise the chimney because of electric lines. The chimney is under 3' tall including spark arrestor cap. The chimney is 5' below peak of garage and 12' below peak of house. Prevailing winds work in my favor. I knew when I did this it was risky business, but it was the only feasable location. I've been burning for 3yrs summer DHW and winter. You know the saying I'd rather be lucky than smart. I'd suggest just try what you have, you can always add more later.