Reasons To Build-In Vent Free Gas Logs and Fireplaces
The Building & Remodel Guide To Vent Free Gas Logs Supplementary Heat
A GRASSROOTS REVOLUTION IN HOME HEATING COMFORT
MORE THAN TEN MILLION AMERICAN HOMES NOW HAVE
It's because home buyers learn from their trusted neighbors, relatives, co-workers, and friends what works and what doesn't work for them. They find out from appliance users themselves that vent-free gas products deliver clean heat that is safe to use and remarkably efficient.
So when Americans shop for new homes, vent-free gas appliances are often high on their wish list. And that's why vent-free products mean profitability for the home builder and remodeler. Installation costs are up to 60% lower than the cost of installing vented heating appliances.
Vent-free means there's no need to install a vent to the outside, no chimney, no hole-in-the-roof. All you need is access to a gas line, so you can place a vent-free gas appliance just about anywhere.
This guide is designed to help home builders and remodelers to make informed decisions when specifying supplementary heating equipment by providing the facts you need:
FACT: Vent-free products offer substantial savings on installation costs.
FACT: Home buyers value vent-free appliances for their beauty and their ability to significantly reduce heating bills.
FACT: Vent-free products are proven to be the safest supplemental heating product in use today.
FACT: Vent-free appliances meet or exceed nationally-recognized Indoor Air Quality guidelines.
Annually, more than 1 million supplementary gas vent-free heating appliances are sold today. It's a grassroots revolution in home heating comfort. Homeowners delight in bringing their friends and neighbors in on their discovery: that ventfree supplementary heating is a technology whose time has come. So just ask the comfy-warm owners of vent-free gas appliances what kind of supplementary heating they'd like in their next home. You'll hear I love my VENT- FREEDOM! ten million times.
Installing vent-free gas logs can save as much as 60% on installation costs.
Home builder Chuck Edwards, Former Co-Chairman of the National Council of the Housing Industry of the National Association of Home Builders
BUILDING IN ADDED VALUE
THE FACT IS, HOMEOWNERS HAVE FALLEN IN LOVE WITH
But perhaps even more important than the entrancing beauty of vent- free appliances is their practicality. Today's home buyers want heating security. They want safe, clean, efficient heat that is always there when they need it.
For many homeowners, vent-free gas products are the right answer: they're economical to install, and they're safe to operate. You can count on it, if any of my clients have a safety problem, they'll call me right away. But I've never had a safety problem with vent-free gas products.
Home remodeler Peter Haselton, who has installed vent-free gas products in many single-family homes, multifamily buildings and condo apartments throughout New England
STRAIGHT FACTS ABPUT VENT-FREE GAS APPLIANCES
Although millions of American homeowners commonly use vent-free gas appliances, there is still some confusion in the marketplace about these products. Even worse, much of this confusion is based on the dissemination of inaccuracies and misconceptions about vent-free products. Some hard facts are in order. On these pages we address several assertions that have been made about ventfree gas appliances.
Assertion: Some people have complained of health problems.
Assertion: There are concerns about Carbon Monoxide (CO) emissions from vent-free gas logs, especially in households with children, pregnant women, and elderly people.
Assertion: There is no standard that regulates the safety of vent-free products.
Assertion: There is nothing to prevent a thrifty homeowner from using a ventfree gas logs as a sole heat source.
Assertion: There are many places where vent-free gas logs are not accepted for use.
Assertion: Vent-free products produce too much heat in tightly constructed homes.
Assertion: If a customer buys a vent-free gas log set, it is necessary to purchase a quality Carbon Monoxide detector as well.
Assertion: Ceiling fans should not be installed in rooms with vent-free fireplaces.
Fact: Nearly all vent-free gas appliances have manual or thermostatic controls that let the homeowner adjust the input rating to the preferred level of heating (e.g., low to high). Vent-free appliances come in a variety of sizes, ranging from inputs of 8,000 Btu to a maximum of 40,000 Btu. Smaller units are available for bathrooms (2,000 - 6,000 Btu) and bedrooms (10,000 Btu). Manufacturers provide clear sizing guidelines with their products.
Water Vapor Released By Vent-Free Appliances. Some people may be surprised to learn that vent-free appliances produce water. This occurs naturally by burning a combination of gas and air. The water is in the form of a vapor rather than a liquid. You can?t see it with your eyes.
During the cold months of the year, the relative humidity, the percentage of water vapor in the air is low. You've probably experienced a scratchy throat caused by the dryness inside a home during the winter. Health studies have shown that increasing the indoor relative humidity results in a reduction of respiratory illnesses. AHAM, the trade association for the humidifier industry, recommends a 60% indoor relative humidity. To improve the level of human comfort and reduce symptoms like a scratchy throat, many people add humidification with either a portable or whole-house system. Of course, the water vapor added to the air comes not only from humidifiers, but also from a variety of sources such as dishwashers, ranges, showers, etc.
Keep in mind that a home is not airtight. Even one built to the tightest construction standards allowed by codes still has at least 0.35 air exchanges per hour. This means the higher relative humidity indoor air is constantly being replaced by lower humidity outdoor air. You've probably noticed cold air leaks around the windows and doors in your own home during winter. That's indicative of air exchange taking place. While vent-free products increase the relative humidity, the air exchange decreases the relative humidity.
How does a vent-free appliance work in a really tight home? The answer is very well. It's simple: a well constructed home requires less heating, and as a result, the appliance will operate for a shorter period of time and produce less water vapor. Of course, in average homes particularly those located in the most northern climates you may notice some condensation on cold surfaces such as the inside of the windows. However, this condition is indicative of the weather and the construction, and most likely it would exist whether a vent-free appliance is present or not.
In summary, a vent-free appliance produces some of the water vapor that occurs in the home. It serves to help humidify the indoor air, and that's beneficial for human comfort and health. Also, tight houses are superior for preventing condensation problems, making them good candidates for properly sized vent-free appliances.
The Oxygen Detection Safety-Pilot:
Safety is built into every vent-free gas logs or product. Every vent-free unit sold in the U.S. comes with a precision-engineered Oxygen Detection Safety- Pilot (ODS).
The ODS automatically reacts to a reduction in the room's oxygen supply. If the oxygen level approaches 18%, the ODS shuts off the gas supply, eliminating any possibility of danger well before an unsafe level is approached. What's more, the vent-free appliance can only be re-ignited manually, and only when the room air is back to normal.
According to ODS manufacturers, no documented deaths have been attributed to emissions from an ODS-equipped product. With more than ten million vent-free units operating in American homes and more than 50 million worldwide, that is an exemplary safety record.
TECHNOLOGY BEHIND THE ODS OPERATING SYSTEM
Oxygen Level Drops:
LET'S CLEAR THE AIR
The study was performed in a real home, the AGAR research and demonstration house. AGAR scientists tested the levels of all five major contributors of indoor air quality oxygen, carbon monoxide, carbon dioxide, nitrogen dioxide, and water vapor (humidity) against the latest IAQ guidelines and recommendations. The researchers concluded that, in all cases, vent-free gas heating products performed well within nationally recognized guidelines for indoor air quality. Vent-free gas products provide clean heat.
* AGAR was the research arm of the International Approval Services (IAS), a nationally recognized independent testing agency. IAS, formerly known as A.G.A. Laboratories, now known as CSA International, has been certifying gas appliances since 1928 to ANSI safety standards. In 1997, AGAR was purchased by Energy International, Inc.