Can I heat my home with my fireplace?

Q: I am tired of high propane prices and I can’t afford to upgrade my furnace yet. So, this winter I am trying to heat my living room area with my wood burning fireplace. My intent is to use the fireplace as a supplementary heating source so my furnace doesn’t run so much. SB

[SB has an open zero clearance fireplace that is built on an outside wall of your home. It has no glass doors and not heatilator or fan.]

A: SB, Unfortunately, Efficiency wise this is probably the worst type of setup possible in order to generate heat to the living area. As a matter of fact, you will probably find that you consume 10% to 230% more propane when you are using the fireplace than when you don’t use the fireplace. I would encourage you NOT to use your fireplace as a way to save money on heat. Here is why:

1) The first thing you do when you go to start a fire in the fireplace is open the damper in the flue. Opening your fireplace damper is like opening a hole in your sealing. The second you open it the warm interior air is raising right out the chimney. So until you get a sizable fire going that is generating a good amount of radiant heat you are loosing heat to the chimney.

2) While you have a sizable fire going in the fireplace you are loosing in 3 ways.

  • The fire is drawing warm air from your home for the combustion process.
  • The fire is casting 90% of its BTUs up the chimney and only putting forward 10% into your home as usable radiant heat.
  • The chimney is continuing to pull warm atmospheric air from your home and allow it to rise out the chimney. This in turn creates a vacuum stack effect that draws cold outside air in through cracks, windows and doors making your home cooler.

3) When the fire dies down and smolders you still have to wait with your damper open. The smoking and heat has to stop entirely before you can close the damper. During this time your fireplace is not generating any radiant heat at all and the damper is still robbing your home of heat.

SB, The moral of this story is a fireplace is not a good source of heat for a home. I know that our forefathers use to heat their entire homes with this type of heat, but the issues that I explained is the reason that potbelly stoves and wood furnaces became so popular in the 1800’s.

There are some things you can do to make your fireplace more efficient and I discuss them in this blog article: http://chimneyballoon.typepad.com/blog/2007/01/how_can_i_help_.html

This is how a Chimney Sweep can take advantage of a homeowner!

This is how a Chimney Sweep can take advantage of a homeowner!

Clean Your Own

This is a summary of a phone conversation I had with a very nice older woman in a North suburb of Chicago. I will refer to her as Mrs. G:

Mrs. G: Thank you for the information on the Chimney Balloon. I hired a chimney sweep to come to my home so I could have him measure to fit a Chimney Balloon.

Jason: That is a great idea. I know you expressed concern about getting your old damper open as it has rusted closed. How did that work out for you?

Mrs. G: It went well but the chimney sweep suggested an Exhausto Chimney Fan so I can seal up my chimney. He said it would cost about $900 to install one.

Jason: Exhaust makes a very good product Mrs. G. but I thought you said you do not use this fireplace at all?

Mrs. G: I never use this fireplace but the sweep told me this was a good way to stop heat loss through the chimney.

Jason: Well the Exhausto does have a feature that tops the chimney when it is not blowing, but if you really want to top your chimney it would be best to just have the sweep cap the chimney with a top cap plug.

Mrs. G: The sweep told me that the Exhausto will keep me from losing heat out the chimney and act as a top sealing damper.

Jason: Yes, but primarily the Exhaust is made to draw air up the chimney. It is perfect if you had a chimney that did not draft well and you use it often. In my opinion, You would be better served to get a more economical top sealing damper, like the ones made by Lymance,  if you are looking to seal the fireplace at the top and you would like to still have the option of using it. If you don’t plan to use the fireplace and you never have, and if you have no known smoke draft problem, you would be wasting money by installing an exhausted. Is this Chimney Sweep someone that you know and trust.

Mrs. G: Well, this chimney sweep is from the yellow pages, I have not used him before. But he says he knows what he is talking about. He thinks this will work to create the right amount of air in my chimney so it won’t be cold anymore.

Jason: Mrs. G. I think this guy is trying to up-sell you and does not have your best interest in mind. I would call another sweep and have him look at your fireplace. Ask him if he thinks a Chimney Balloon or a top sealing damper would work best for you.

Mrs. G: Well I already have signed the estimate for the Exhausto so they are installing it tomorrow since they had a cancellation.

Jason: Mrs. G I would encourage you to call to see if you can have this guy let you out of that estimate. I really encourage you to have another person look at this first. We can look up some reputable chimney sweeps through the National Chimney Sweeps Association and get you another opinion.

Mrs. G: Maybe that would be good I will call him and call you right back

Jason: OK, in the meantime I will look up some reputable sweeps in your area. I will have you a few phone #s by the time you call back.

Mrs. G: OK Jason, thanks, goodbye.

Mrs. G never called me (Jason) back. I can only assume this chimney sweep talked her into the installation again. I didn’t care if she bought a chimney balloon or not. I actually thought a lock top damper may be what she wants. But I knew for sure an exhaust was going to be overkill.

Help, my Chimney Balloon is deflating!

Help, my Chimney Balloon is deflating!

Chimney Balloon is deflating!

Q: Jason, Your customer service has been top notch, but I’m still not having good luck with the Chimney Balloon. I purchased one a year or two ago. Over time I noticed it had become deflated. I’ve not blown it back up a number of times in the past week. It must have a leak somewhere as it will not stay inflated. Do the valves develop leaks?

Anyway, I’m just a bit frustrated and wishing this worked better than it does. I’m not sure there’s anything to be done about it, but I needed to vent (no pun intended). – SR

A: Dear SR,
There are some applications that are just not hospitable to the Chimney Balloon. I’m afraid this may be one of those applications.

However, we now have a product that is quite a bit more durable than the Chimney Balloon, because it is a dense-backed wool pad instead of an inflatable bag. It is called the Flueblocker. You can see it at www.flueblocker.com.

Judging by your photos and the Chimney Balloon size you purchased before, my bet would be on the 14×36 Flueblocker. The length will be perfect, but you might have to trim a bit off the depth. I would try fitting it full-sized first to see if it is a pressure fit, and then trim down from there if needed. Just like a haircut, you can always take more off, but you can’t glue it back on.

Here is a link to that size: https://www.flueblocker.com/product/14inch-x-36inch-rectangle/

– Jason[

How do I seal a zero clearance Majestic brand fireplace so it isnt so drafty?

How do I seal a zero clearance Majestic brand fireplace so it isnt so drafty?

Zero clearance Majestic brand fireplace

Q: We have a zero clearance fireplace manufactured by Majestic. I’ve tried another fireplace product which is supposed to fit at the top of the firebox to cover the flue. It did not fit properly because there are two metal “fins” that extend downward from the top of the firebox on either side of the flue. Does your product work with zero clearance fireplaces?

P.S. Was glad to read the question and answer about burning candles while the Chimney Balloon is in use. Thanks for the info!- TP

A: Dear TP, The Chimney Balloon does work with Zero Clearance fireplaces like the Majestic model you are referring to. As a matter of fact, I am using a 9×9 Chimney Balloon in a Majestic Zero clearance fireplace in my own living room.

Since the Chimney Balloon is installed up into the flue you can get it up past these fins and inflate it into place. I would recommend though that you use an HEK extender with your Chimney Balloon since the fins are so obtrusive in this model fireplace. Give us an email or a call if you have any more questions. – Jason

Followup: Just wanted to follow up to say that the 9×9 Chimney Balloon fit my zero clearance perfectly. This has made a major difference in the drafts attributable to our fireplace. Thanks for a terrific product!- TP

Reply: Hi TP, Thank you for checking back with us. I’m glad everything worked out so well for your application. It is a relatively simple fix with a Chimney Balloon. – Jason[/vc_column_text][/vc_column_inner][/vc_row_inner][vc_empty_space][/vc_column][/vc_row]

Choose a way to heat your home? Get the most “Bang for your BTU!”

Choose a way to heat your home? Get the most “Bang for your BTU!”

Cost of using that fuel

If you are planning to buy a corn or pellet burner or replace your heating oil or natural gas furnace you should visit this heating cost calculator first at http://www.nhclimateaudit.org/calculators.php

this calculator gives you side by side comparisons to e most common heating fuels and lets you know how to get the most bang for your BTU. You simply enter the cost of each of the fuels available in your area. (Below is a sample of fuel costs for my area of Wisconsin) and it will let you know the cost of using that fuel. (Below is a screenshot of the calculator)

This chart offers an unbiased “apples to apples” comparison of fuels. It is well worth exploring before you put many thousands of dollars into a furnace or heating fuel change.

Fireplace Damper vs Chimney Balloon? Which one works better?

Fireplace Damper vs Chimney Balloon? Which one works better?

Energy audit

Q: Jason, You say that a Chimney Balloon fireplace damper can save you 14% on home heating. This number seems unreal. Where do you get such a figure? What does a Chimney Balloon do that a metal fireplace damper cannot do? – SH

A: Dear SH, I am really glad you challenge us on this. All marketing claims should be challenged! And I will be happy to explain our figures. First of all the US Department of Energy says that the fireplace accounts for 14% of a homes heat loss. It stands to reason that if you seal your fireplace uptight and efficiently you will not be losing this heat.

Now, there are average ways to stop that heat loss, like standard metal fireplace chimney dampers, or metal chimney top dampers. And, there are superior ways to stop that heat loss that will seal the flue off efficiently and not allow air to pass.

We hired a third party certified energy rater to put the Chimney Balloon on a head to head test against a metal damper and glass doors. The energy rater used a 1200 square foot ranch style home that was reasonably tight and energy efficient already. In this test, he tested the home with the 9″ round fireplace damper open (as if the fireplace had no damper). He tested the fireplace with the metal damper closed. He tested it with the fireplace glass doors closed, He tested it with the damper and the glass fireplace doors closed, And then he tested it with the Chimney Balloon installed.

The results of this test were as follows:

  • The home was 27% more efficient with a Chimney Balloon than if it had no damper.
  • The home was 16% more efficient with a Chimney Balloon than if the metal damper was closed.
  • The home was 6% more efficient with a Chimney Balloon than if it the glass doors were closed

If you would like to see the entire results of this test of the fireplace damper vs Chimney Balloon please visit this link?: http://www.chimneyballoon.us/fireplacedampertest.html

To read more information about energy efficiency and how to tighten your home energy envelope visit: http://eere.typepad.com/energysavers/2008/10/reduce-your-hea.html

– Jason