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Thread: Response to 'Article'
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01-16-2011, 06:50 AM #1
Response to 'Article'
In the 'Articles from Inspection Community', Brian posted "Common venting of gas appliances". I tried to post a reply there, but it wouldn't let me, so I'll do it here.
In the article, it stated the following-
Category III Appliances in residential use are mostly tank-less water heaters that are vented through the wall with stainless steel. These appliances operate with positive vent pressure and, therefore, cannot be adjoined to a gravity-vented water heater.
I believe the word 'mostly' needs to be understood better.
Here in NJ, while not frequently, I do on occasion see Cat III boilers and furnaces. I think it is important that the inspector read the appliance spec plate before reviewing the appliance. Here's photos of what I found in a house I inspected in August.
Similar Threads:Darren www.aboutthehouseinspections.com
'Whizzing & pasting & pooting through the day (Ronnie helping Kenny helping burn his poots away!) (FZ)
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01-16-2011, 07:23 AM #2
Re: Response to 'Article'
I see those Weil McClain boilers too, and sometimes they're vented with regular single wall rather than the sealed stainless Z vent.
Are there any newer Cat III Furnaces around? I've seen some older models.
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01-17-2011, 04:21 AM #3
Re: Response to 'Article'
As usual, you are correct Neal.
The furnaces I've seen are older types; it seems all the new direct vents furnaces are 90%. However, the boilers are almost all newer; I believe the one in the photo was 2 years old.
Darren www.aboutthehouseinspections.com
'Whizzing & pasting & pooting through the day (Ronnie helping Kenny helping burn his poots away!) (FZ)
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