Pennant is actually considered a fan-assist atmospheric boiler, which uses atmospheric venting. But they use a fan on the out-side blowing in to regain your pressure loss on the combustion side. That helps a lot.
A union shop here in the city is usually a quality shop. We have very high education levels with the guys on the service side ... part of their pay scale is actually tied to how many hours of training they do each year.
It turns out you could no longer purchase coils the correct size for those old Trane units. We had to have some fabricated but the pricing was close enough.
It filled the mechanical room. It was practically wall-to-wall boiler.
