Stove options for short vertical pipe to horizontal bend?

[fjordrr]

Looking for backup options in case getting a Woodstock Progress Hybrid doesn't work out. Am replacing an existing installation where there is only approx 51.5" from hearth to middle of exit pipe, so looking for stove options that will burn well with a short vertical pipe before taking a bend to horizontal (to enter chimney.)

Example - Lopi Rockport says it needs 84" (!) so that is out. Will consider cast iron or steel. Prefer stove with cat & bypass, & takes at least 18" log i.e. a bigger stove.

Here's a pic of the old (now removed) stove:

 

[begreen]

That may be misinterpreting the Lopi manual's requirements. 84" sounds like the minimum ceiling height.
What's important is whether there is a 6" insulated liner in the chimney and the chimney liner height from thimble to chimney cap.

 

[fjordrr]

Thank you. Yes, there is a 6" liner installed in '22 and at that time the exterior portion of the chimney height was increased a couple of feet with pipe. I'd love for me to be misinterpreting the Lopi manual, this is what it says with a pic:

"A vertical rise of 84” (2134mm) of chimney connector is required, measured from the floor, before entering a Class ‘A’ chimney wall penetration (see below). Note that the measurement is to the centerline of the flue when it makes a 90-degree bend. Follow the clearances specified by the manufacturer of the double-wall connector (or 18” (457mm) if using single-wall connector).."

 

[stovelark]

I looked at manual too, that is a difficult vertical requirement to achieve, if going horizontal... seems they really want a vertical chimney if possible. I understand operationally the taller rise is desirable, but I'd think the install would look a little awkward... its unusual. Stay warm.

 

[begreen]

Thank you. Yes, there is a 6" liner installed in '22 and at that time the exterior portion of the chimney height was increased a couple of feet with pipe. I'd love for me to be misinterpreting the Lopi manual, this is what it says with a pic:

"A vertical rise of 84” (2134mm) of chimney connector is required, measured from the floor, before entering a Class ‘A’ chimney wall penetration (see below). Note that the measurement is to the centerline of the flue when it makes a 90-degree bend. Follow the clearances specified by the manufacturer of the double-wall connector (or 18” (457mm) if using single-wall connector).."

View attachment 338155

Thanks. I found that page. Travis sometimes goes to extremes to be compliant. This is the first time I have seen this statement, but it clearly states that this is for a class A (UL 103 HT) chimney connection. That is not what you have. The next paragraph covers the chimney liner connection. Unfortunately, there are two threads on this same topic which is causing some redundancy . I've closed the prior thread with a link to this one.



More important is the Rockport's minimum chimney height requirement of 15'. In measuring the liner height, subtract 4 ft for the resistance introduced by the two, sharp, 90º turns in the flue path as it goes through the elbow, then the liner tee.

Woodstock? thread - https://www.hearth.com/talk/threads/w-wa-installer-for-woodstock-stove.207274/

 

[fjordrr]

The weather hasn't been conducive to getting the measurement, but will soon. Just so I understand 100%, I measure from the middle of the liner tee to bottom of cap, then subtract 4'? I'm already guesstimating that may be short of 15' due to the subtraction. But I am not a good estimator so take that with a grain of salt...

 

[begreen]

Correct, a rough rule of thumb is to subtract 2' for every 90º turn in the flue path. A variable is altitude which also requires greater flue height at higher altitudes over about 3,000 ft.

 

[fjordrr]

Got sidetracked (rodent in your truck's cabin air filter & both sleds will do that) - but got this done, 15 feet minus 4 feet = 11 feet. So Rockport is definitely out, correct?

 

[begreen]

An easy breathing stove will likely perform best in a milder climate with a short flue. Look at Canadian stoves from SBI, PE, & Regency.