The number to Backyard Living Source is 1-866-448-8229, I am proud of our customer service, I will gladly help you resolve your problem. Ask for Jennifer We do sell autmatic roof vent and louvre window openers individually. You should take your automatic window openers off in the winter time. If the gel inside freezes, it cracks and turns into the oil that was leaking. Here to help educate, happy gardening. Here is a link that might be useful: Rion Automatic Window Openers

The main draw of a Ventless Gas Log installation the amount of heat output it is capable of. Ventless Gas Logs are able to operate with the fireplace damper closed. This way the heat circulates into the room rather than up the chimney. This leads to efficient and low-cost heating of your room. In situations of power loss, a Ventless Gas Log set can even be used as a backup heat source. Since burning material of any kind creates a certain amount of carbon monoxide, one may wonder how an unvented log set can safely operate. Unvented Log Sets actually burn so hot that nearly 100% of the fuel is combusted. This decreases the amount of soot and carbon monoxide generated down to a negligible level, allowing Ventless Gas Log sets to operate in a safe manner. Another byproduct of using a Ventless Log Set is a small amount of moisture. In the winter months this moisture can be beneficial in a dry room. If you are also using a humidifier, excess moisture may result in condensation on windows. For an additional safeguard, Ventless Gas Log Sets are always equipped with an Oxygen Depletion Sensor. An ODS measures the amount of available oxygen in the room and will turn off the burner before the oxygen in the room reaches a dangerous level. The method in which this fuel burns can be thought of as similar to how a natural gas range works in your kitchen. The burner on your range is specifically designed to achieve a clean and smokeless flame. The technology available in Ventless Gas Log Sets on the market today works on similar principles. One disadvantage of Ventless Logs are that the flame is generally smaller. A realistic flame is still possible, but it may not be as large as a flame from a Vented set of comparable size.

I wish someone would answer you, I was going to post something similar myself. We have a contract on a home and I had the chimney inspected today (realtor says I'm the only person in her entire career to have a chimney inspection, but you'll see why) Inspector told me the flue tiles needed to be replaced and the to reline a chimney was about $4K-$5K or could have the tiles that needed to be repaired which iwas about half that price - he wasn't positive on pricing as he does not do this type of work. He actually called me back and the low end pricing from the company gave him a guesstimate of $1500-$2500 depending on what I decided to actually have done. Originally, this was a wood burning chimney and now is gas. I know there was an issue with the damper not opening correctly and was having the owners clean it out before the inspection. Due to the issue above, he didn't do the cleaning - not until we decided what to do about the flue issue. Anyhow, I'm not putting out any more money on the home, it would be the owners who'd have to repair. My realtor called me back a little while later and said the listing agent spoke to the owners and came up with what they think would be a solution - a vent free gas fireplace. Since I'm a Floridian who's never had a fireplace in her life, I know nothing about any of this. I'm trying to find out if what they are proposing, how it differs from the gas fireplace that's there already. Will what they put in look the same as what's there now? They claim it's more energy efficient. I'm glad you are asking the questions you did above because I wouldn't have known to ask them, so I really hope someone knowledgable will answer. In the meantime, I was given the name of a guy who does gas fireplaces for a living. Will try to reach him and if I can , ask those questions and let you know what I may be able to find. If I go with the ventless, I'm still having them clean out the damper. With it not opening all the way, that means cool air is still coming in, and in summer, cool are is going out. Please let me know if you came across any info. THANKS!!!

You might consider replacing the "boots" to a common size, then just purchasing standard size boots. You may come out cheaper in the long run and get a better selection of grilles. As long as the boots are accessible, you can easily change them. If you have wall grilles, it may be even easier since a "wall stack" is usually used. That's just a duct the size of the wall space. Take a grille off and see what's behind it. It may be easier than you think. Duct boots are usually just attached using a couple of roofing nails. Just stick a screwdriver behind it and pry a little. You can purchase the standard size boots at your local home center or just hire it done. Either way it might be cheaper. I've had to have custom grilles made and it's usually pretty expensive. Also, you might want to consider sealing your ducts while you're in there. . It will pay back several times during first year. Here's an article I wrote covering just this topic Duct sealing.