Can i power vent this furnacePost created: 2013-04-10 Type of Equipment: Furnace Views: 154
Can I power vent this furnace I need to take the chimney down and want to vent the furnace out the wall
On 2013-04-11 JB wrote:
For some reason the furnace model didn't come through with your question.
However, there are a few general thoughts. The first is that if you have a high efficiency furnace, especially a newer one they are much better at absorbing or extracting the heat from combustion and using it to condition the air in the home. This means that what is left over from combustion is cooler than would be the case in less efficient and/or older furnaces.
Since venting through a chimney relies on the natural tendency of hot air and gases to rise, if they are cooler they vent less efficiently (at least this is what you would hear from a company selling power venting equipment, but rings true). Following this line of thinking you may actually achieve better venting via power venting out the wall.
There is also the issue that if your chimney is older and breaking down that it may have leaks and is not venting efficiently or allowing some combustion gases into the home. This is a safety issue so finding a solution that is effective and economical is a good idea.
There may be a limit to the applicability of doing this. I have read that if you have a lower efficiency furnace that the temperature of the combustion gases may be enough to melt the PVC piping. There may also be other limitations.
Therefore, you will need an experienced and certified HVAC to come out and assess if this is possible and what it would take. This is also not a job to be taken lightly since it requires knowing what you are doing to set up a safe situation.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.