stove/ range hood vent pipe

[cuda70gt]

I am installing a new electric stove in an existing structure.its a basement sweet and open joist for now.
what size pipe is generally used to to vent the stove? 4" 5" 6" 7" ? I am not sure:hmmmm2:

cuda70gt

[mainlymojo]

Hi

It depends on the size of the canopy hood, if it's a 600mm/2' usually it's a 4" duct, or if it's a 1200mm/4' it can be either 4",5", or 6" depending on the size of the extractor fan outlet, and how long the duct run is.

If you are installing the cooker in the basement and you don't have clear access to an outside wall, and you have to run the duct up onto the next floor then outside you might be better off stepping up to a 6" duct to the outside wall, then reducing down to the hood outlet size.

This will maintain a good flow with less restriction for the air to move and will help the fan to run quieter due to the smooth flow of air

You need to decide which make of canopy hood your going to buy and what flow rating the fan is.

Sometimes some of the smaller fans can run faster and have a higher flow rate but tend to be more noisyer than the larger fans.

Hope this helps

Martyn

[suemarkp]

The most common sizes I've seen for range hoods are 6" round and 3.25 x 10. But best to go pick it now and make the pipe match. Especially if it must take a rectangle and you want round, or vice versa. There are adpter boots, but they need space.

[cuda70gt]

wow, ok, thanks guys!!
I had picked up 6" pipe and was ready to install when I saw an episode of "Holmes on homes" and he said that 4" is standard for a hood range/ convection over stove running on 220...I didnt want to run the 6" pipe then have to rip it out.
the stove pipe will need to run about 16 feet between two 2x10 joists to an exterior where it can be vented outside.
I could run it upstairs and patch it into the existing vent but that would require extensive modification of the upstairs walls. I think running along 2 open joists is will be ok and pass code.

I guess I should go pick out the stove vent I will be using and match the pipe to it. I was going to install a microwave/ hood vent (money is not an issue).

so, let me get this straight.... there is no problem with adapting a 4" pipe up to a 6" if that were the case??

cuda70gt

[suemarkp]

If you ran a 6" pipe and have a 4" hole on the range hood, that is easily dealt with. The other way around is not -- smaller pipe would be too restrictive. Is it possible that the pipe can be too big, but most range hoods flow pretty good, and with a long distance to go (more than 6' straight up), bigger pipe and bends will make for a quieter fan and more air flow.

[househelper]

I have never seen a range hood that requires 4" diameter... most require 6" or 7", some downdrafts require 10". Better check the actual unit you are going to use before buying the pipe.

[cuda70gt]

I can not thank all you guys enough, this site is awesome!! I will recommend to everyone and anyone who is attempting a project and needs a little advice.
being pointed in the right direction is worth its weight in gold :beer:

thx
cuda70gt