Direct Vent or Chimney

Direct Vent or Chimney

PostBy: JoeP On: Wed Jun 25, 2008 9:12 am

Hi all,


I'm new here. Thinking about getting an automatic coal stoker, like the Harman DVC-500 to take save some money that is going to oil to heat my house.
My house doesn't have a regular chimney. The oil burner is in the basement, and has a galvanized flue pipe that goes up two levels to the roof for venting. I have baseboard heat from this unit.

So, I'm seriously considering direct venting the Harmon stove on the first floor, which hopefully will heat that floor and the next, which is the primary living space, and only use the oil burner for hot water.

Does the direct vent system stain up the outside of your house?
Is there any problems with "fly ash" getting all over?

Is it a better idea to consider a chimney installation?

Or, scrap this idea and get a duel-fuel (coal/oil) system to replace the current boiler. If so, can I use the same flue pipe system with coal?

Thanks for the help. I am on the verge of ordering the direct vent system, but need some advice as to the drawbacks.
JoeP
 

Re: Direct Vent or Chimney

PostBy: Devil505 On: Wed Jun 25, 2008 9:36 am

JoeP wrote:I am on the verge of ordering the direct vent system, but need some advice as to the drawbacks.



Welcome Joe. Build a masonry chimney.


Reprint from another thread:

My opinion is this: Unless you have legitimate reasons for not building a masonry chimney, it makes little sense to power vent.
If you consider this:
1. A masonry chimney will last practically forever & probably never require maintenance in your lifetime (not even cleaning if you just burn anthracite coal)
2. A masonry chimney costs nothing to run & emits no noise. Power vent runs 24/7 with a coal stove & the noise can be annoying.
3. Once you deduct what a power vent would cost, a block & clay lined chimney is not that much more expensive (& can be faced with brick if looks are important)
4. A masonry chimney operates fine in power failures......a power vent means you lose your fire.

I would never power vent unless I had absolutely no alternative.

Just an opinion
Devil505
 
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

Re: Direct Vent or Chimney

PostBy: JoeP On: Thu Jun 26, 2008 4:38 pm

Thanks Devil.

I told my wife about your post. :)

The expense of construction, plus the cost of the stove, and the cost of the fuel to begin saving this year seems high. Although we are going to check with the contractor we use and get an estimate just to see.

If its too much, we are going to get the stove anyway and direct vent. That way we can use the fuel savings in the next 12-24 mos we would have blown on oil to fund a chimney.

What is the difference between power-venting and direct-vent units like the DVC-500? My cousin runs a pellet stove which uses "direct-vent." The only noise I found noticeable was the slight whoosh of air from the circulation blower used to cycle room air through the unit for the indoor air.
JoeP
 


Re: Direct Vent or Chimney

PostBy: coaledsweat On: Thu Jun 26, 2008 4:51 pm

Is your oil burner a boiler? If so, I would recommend a boiler and not a stove.

Either way, you could put the coal appliance on the existing chimney and power vent the oil unit. On a coal fire it would run all the time, on the oil unit it would only run when the oil burner is running. Let us make sure that doesn't happen again. :)
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Direct Vent or Chimney

PostBy: Rob R. On: Thu Jun 26, 2008 5:00 pm

JoeP wrote:What is the difference between power-venting and direct-vent units like the DVC-500?


A power-vent is basically a fan at the end of the stove pipe that creates a draft and blows the exhaust outside. It "sucks" the exhaust out of the stove and pushes it outside. A direct vent stove depends on the combustion fan to push the exhaust out of the stove, through the pipe (which has sealed joints) and outside.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Direct Vent or Chimney

PostBy: Devil505 On: Thu Jun 26, 2008 5:10 pm

JoeP wrote:Thanks Devil.

I told my wife about your post. :)

The expense of construction, plus the cost of the stove, and the cost of the fuel to begin saving this year seems high. Although we are going to check with the contractor we use and get an estimate just to see.

If its too much, we are going to get the stove anyway and direct vent. That way we can use the fuel savings in the next 12-24 mos we would have blown on oil to fund a chimney.



I hear that JoeP & think whatever you do to start burning coal ASAP will be a huge savings to you. I was just pointing out the ideal situation in answer to your question.
Devil505
 
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

Re: Direct Vent or Chimney

PostBy: katman On: Thu Jun 26, 2008 7:04 pm

The chimney you have must be suitable for a coal burner so why bother with a coal stove. If you have baseboad why not just get a coal boiler and use your existing chimney? If you can get the coal to the basement and the ash out you will be able to heat you whole house as you do now, only you will spend a lot less than you will spend with oil. Plus, you can heat your hot water with the boiler too.
katman
 
Hot Air Coal Stoker Stove: Harman Magnum
Other Heating: Harman PB 105 Pellet Boiler

Re: Direct Vent or Chimney

PostBy: JoeP On: Wed Jul 02, 2008 12:04 pm

Wow, lots of encouragement to go the whole way from oil to coal.

My wife & I already ordered the stove and will try the direct vent. Harman is back ordered right now, so we we won't have the stove until late fall, early winter. :/

Maybe if that works out and we aquire confidence in our coal dealer here (the only one in the area), and the coal stove/boiler dealer for services, we will go full coal, and replace that oil burner and sell the stove. I guess it is going to take some getting used to (work, etc) when compared to our oil system. But the money savings is going to make it fun.

Katman said, "The chimney you have must be suitable for a coal burner so why bother with a coal stove. "

The existing flue pipe (is this considered a chimney?) that goes from our basement to the roof that the oil system uses...this is adequate for coal? I mentioned earlier that it is galvanized pipe boxed in a vertical shaft. If I put a coal boiler on there one day, will I need to replace anything (go stainless, etc)?

Sorry for all the questions. :) We appreciate the opinions and answers, of course.
JoeP
 

Re: Direct Vent or Chimney

PostBy: Rob R. On: Wed Jul 02, 2008 1:09 pm

Galvanized pipe will rust out quickly when used with a coal appliance. A masonary chimney is ideal, stainless is next in line.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy