B vent question
1 - 6 of 6 Posts
Joined
·
25,124 Posts
Yes on both accounts, especially if it is a mid efficiency furnace. You can single wall vent the water heater to the B vent but the furnace should have B vent so the flue gas does not cool down B4 it gets to the chimney. They used to allow single wall from the furnace but changed the code to B vent where I am. B vent is ALWAYS better for both appliances as you do not want the flue gases to cool down or condensation or corrosion occurs.
And with b-venting there is no power vent its all natural draft? Also, what make the double wall b-vent pipe able to keep exhaust gases hotter than single wall?
Joined
·
25,124 Posts
B vent has 2 layers. 1 inner liner and then a air gap and then a outer liner. Like a thermos bottle the air gap keeps the heat from escaping. Most manufaturers want B vent on mid efficiency units so there is no corrosion problems with the furnace. Has nothing to do with power venting or draft. It is simply a 2 layer vent with an inner and outer liner/sleeve.
Joined
·
42,671 Posts
Through a chimney, as in you already have a chimney?
If so, you can just line that chimney, and save yourself a lot of money.
1 - 6 of 6 Posts
