In addition to the four vent categories many boiler manufacturers offer specialized vent systems.
Can you direct vent a steam boiler.
Cut the vent hole.
These are typically direct vent systems utilizing some form of a two pipe system.
I know of no steam boilers which can be direct vented.
New yorker boiler company manufacturer of reliable residential hydronic heating products offers a complete line of cast iron and steel boilers as well as an indirect water heater.
With a product line that offers both gas fired water and steam and oil fired water or steam boilers new yorker boiler now offers a new energy star certified high.
This raises the steady state efficiency.
In the direct vented system flue gases are not cooled in a chimney.
Today there many boilers of this type available on the modern market.
Direct exhaust venting draws combustion air from the utility room or boiler room around the heating appliance and vents appliance exhaust out through a building sidewall or through the roof using an approved or listed b vent metal chimney or similar materials.
Weil mclain 3 concentric vent kit pvc for weil mclain wm97 eco gv90 ultra 80 ultra 105 and ultra 155 hot water boilers mpn.
Heat that is typically lost in the chimney can be extracted in the heating appliance dropping the gross stack temperature to 300 f 350 f.
The question is whether they re worth your attention.
In a two pipe system one pipe vents the products of combustion outside the building while the second pipe draws combustion air from outdoors.
Burnham s new megasteam is probably the highest efficiency oil fired steamer available.
A direct vent gas boiler is a unit that includes a closed horizontal piping system that goes through a side wall right to the outside for exhaust and intake air.
Measure from the direct exhaust vent on top of or on the side of your boiler to the chimney or wall to determine the cast iron pipe vent length.
Use your roof chimney to vent your gas fired boiler.
If you have no chimney drill a vent through an exterior wall.
Any can be power vented safely.