Duravent pipe temps

[Champlainsailor]

Replaced my 20 yr old Vermont Castings propane stove this summer with a slightly used Stardance model. It came with duravent piping, I had to purchase fittings to go through the wall as well as the exterior wall cap. It vents up for about 2' before a 90 that exits out. It is exactly the setup the previous owner had that was installed by a dealer and conforms to venting instructions in the manual. My previous stove vented straight out the back and worked well and pipe temp was never a concern.
Finally got it all set up and the new piping is getting fairly hot, its the 6 and 5/8ths outer pipe surrounding 4" inner. Pipe temp on vertical pipe can reach 170 degrees after running for a bit, the short horizontal run gets as high as 190. Is that anything to be concerned about? Inside the wall is a 12" x 12" plywood chase about 10" long, lined with sheet metal through which the duravent goes. I even added a 8" piece of pipe around the duravent for good measure. A neighbor is a fireman and carpenter and says I did a great job and temps are not extreme, but don't think he knows much more than me. It is burning well, good flame but just seems hot to me.
What do you think?

 

[Lennox65]

Replaced my 20 yr old Vermont Castings propane stove this summer with a slightly used Stardance model. It came with duravent piping, I had to purchase fittings to go through the wall as well as the exterior wall cap. It vents up for about 2' before a 90 that exits out. It is exactly the setup the previous owner had that was installed by a dealer and conforms to venting instructions in the manual. My previous stove vented straight out the back and worked well and pipe temp was never a concern.
Finally got it all set up and the new piping is getting fairly hot, its the 6 and 5/8ths outer pipe surrounding 4" inner. Pipe temp on vertical pipe can reach 170 degrees after running for a bit, the short horizontal run gets as high as 190. Is that anything to be concerned about? Inside the wall is a 12" x 12" plywood chase about 10" long, lined with sheet metal through which the duravent goes. I even added a 8" piece of pipe around the duravent for good measure. A neighbor is a fireman and carpenter and says I did a great job and temps are not extreme, but don't think he knows much more than me. It is burning well, good flame but just seems hot to me.
What do you think?

With all due respect to your fireman neighbor, you should not do anything that is not specified in the installation manual for that appliance.

Each appliance is tested and listed with specific pipe and accessories. Anything other than this can be a fire hazard.

 

[Champlainsailor]

So all installation is per the manuals and to code. Question had to do with duravent dv piping. I've thought that double wall piping would be almost touchable on the outer wall. Again, this is new to me. Sensing that temps below 200 are probably ok. That was my question.

Just trying to be safe. My neighbor /fireman guy is like me, retired but lots of building experience. Rural area, no one else to ask. Question remains. Is 170 on verticle pipe and 190 or so on short horizontal runs on Vermont Castings Stardance propane stove to be expected ?
Thanks once more

 

[Lennox65]

So all installation is per the manuals and to code. Question had to do with duravent dv piping. I've thought that double wall piping would be almost touchable on the outer wall. Again, this is new to me. Sensing that temps below 200 are probably ok. That was my question.

Just trying to be safe. My neighbor /fireman guy is like me, retired but lots of building experience. Rural area, no one else to ask. Question remains. Is 170 on verticle pipe and 190 or so on short horizontal runs on Vermont Castings Stardance propane stove to be expected ?
Thanks once more

The double wall design of direct vent pipe does not have insulation between the two pipes. The space between is used for bringing the combustion air in from outside. This will have some cooling effect on the outer pipe, but that is not it's purpose.

You could check with the tech people at the manufacturer. The manuals don't specify a temp range for the pipe but they would know.
One temp range that I am familiar with is the combustible wall directly above a direct vent fireplace. This can be as much as 110 degrees Fahrenheit above ambient temp which could put it at 180-190 degrees, and this is acceptable.

 

[Champlainsailor]

Thank you,
I did ask this question of the supplier of the piping as well. Just heard back and he assured me that the temps I'm seeing are well within the parameters of duravent piping. Just trying to be extra cautious here. You are right, manufacturer does not list temperature tolerances. I put a smoke detector in above the stove and a propane/CO2 detector plugged in right behind it for some extra comfort.
Thanks very much for the feedback.