FREQUENTLY ASKED QUESTIONS

WHAT DO THE WORDS “DRAFT” AND “NEGATIVE PRESSURE” MEAN?

The word “draft” refers to the hot air movement that circulates in your stove’s exhaust system, moving from the stove to the outside of the house, and carrying with it the combustion residues. The draft is a natural phenomenon. Hot air weights less than cold air, causing it to rise. This is why the higher the temperature in the exhaust system, the stronger the draft. It is also important to say that the “tunnel effect” created by the exhaust system contributes to increase the draft effect. This is why chimneys that are excessively long often create excessive draft, while chimneys that are abnormally short will have an excessively low draft. The following are often symptoms of a draft problem:

-Excessively dirty (blackened) glass;

-A fire that has a tendency to die quickly when the stove door is closed;

-A stove that does not heat enough.

“Negative pressure” can be seen as a “reverse draft”. That is, air will circulate from the chimney toward the interior of the house. Negative pressure is often what causes smoking problems. In general, negative pressure is the result of either one or a combination of the three factors explained below:

1- A cold chimney. Cold air, which is heavier than hot air, has a tendency to go down the chimney and create the effect of a “clog”. This explains why a stove that has not worked for a long time and which chimney is very cold will sometimes be hard to light and cause smoking problems.

2- Negative pressure can also be caused by a “vacuum effect” in the room or the house. The air in a house is constantly moving. Hot air rises, cold air moves down. Air can also be mechanically expulsed outside of the house with the use of air-moving devices, such as a range hood, a air exchanger, a dryer, a bathroom fan, etc. Furthermore, air goes in and out of the house through cracks, doors, windows, etc. If air leaves a room without being replaced, a “vacuum effect” is created. Therefore, if a house is well insulated and all windows are closed, the room will source its air through the easiest alternative route, which is often your stove’s exhaust system. This creates a negative pressure in your exhaust system. You now understand why it is often suggested that a window be slightly open in the room where the stove is located. This enables the room to easily source its air from outside the house without searching for an alternative route. The vacuum effect can amplified when your stove is located in the basement. This is due to the fact that your house itself acts like a chimney. Since hot air will rise to upper floors, it will “draw” air from the basement of the house. This phenomenon is called the “chimney stack effect”.

3- Wind can also be a third cause of negative pressure. When your house is located near a structure which height is superior to your roof’s, wind currents can create an interference with your chimney, leading to negative pressure problems.

Drawings #1 to #5 starting on page 18 will help you understand the explanations provided in this section.

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Drolet Wood Stove manual Frequently Asked Questions, What do the Words Draft and Negative Pressure MEAN?
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Wood Stove specifications

Drolet Wood Stoves are renowned for their exceptional heating performance and efficient wood-burning technology, making them a popular choice for homeowners seeking an eco-friendly and cost-effective alternative to traditional heating systems. Founded in Quebec, Canada, Drolet has established itself as a leader in the wood stove industry, providing reliable heating solutions that combine innovative engineering with a commitment to sustainability.

One of the main features of Drolet Wood Stoves is their high-efficiency ratings. Many models boast efficiencies exceeding 80%, allowing users to make the most of their firewood while minimizing emissions. This focus on efficiency not only helps homeowners save on fuel costs but also reduces the environmental impact associated with wood burning. The stoves are designed to meet or exceed stringent EPA emissions standards, ensuring cleaner air quality in the home and surrounding environment.

The technologies integrated into Drolet Wood Stoves are state-of-the-art. The stoves utilize secondary combustion technology, which injects heated air into the combustion chamber, igniting unburned gases and particulates. This process enhances the burning of wood and maximizes heat output while reducing smoke production. Additionally, many models feature a built-in air-wash system that helps keep the glass door clean, providing a clear view of the mesmerizing fire.

Drolet Wood Stoves are constructed with durable materials, including heavy-gauge steel and high-temperature paint finishes, ensuring longevity and resilience against the rigors of everyday use. The design of these stoves is both functional and aesthetically pleasing, with various styles and sizes available to suit different home decors and heating needs. Some models come equipped with advanced features like programmable thermostats and rear or side venting options for versatile installation.

Furthermore, Drolet offers a range of products that include freestanding, fireplace inserts, and cookstoves, making it easy for customers to find a solution that fits their specific space and heating requirements. Users can also select from various accessories to enhance their wood stove experience, including insulated chimneys and heat shields.

In conclusion, Drolet Wood Stoves combine efficiency, innovative technology, and stylish design, providing an effective and sustainable heating solution ideal for any home. With a focus on delivering top-notch performance and environmental responsibility, Drolet continues to be a trusted name in the world of wood burning.
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