what is the inside of a fireplace called

what is the inside of a fireplace called

Doctor Flue employee installing a gas fireplace

Fireplaces and chimneys are extra complicated than many householders consider. Throughout your subsequent chimney inspection, your chimney sweep might point out a number of chimney half names that you just aren’t conversant in. Understanding your hearth and chimney higher could make it safer so that you can use and preserve it through the years. On this article, we’ll focus on masonry and fuel fireplaces, defining and explaining hearth and chimney half names, and people elements solely present in fuel fireplaces.

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Key Masonry Chimney Elements

The chimney is the construction which carries off the smoke and gasses of a hearth. It extends upward from the fireside and consists of the half visibly seen above the rooftop. A masonry chimney and fireside mixture can weigh a ton…normally a number of tons! Whilst you might imagine that as a result of it’s constructed of bricks or stone and mortar that it’s indestructible, that isn’t the case. Chimneys are weak to climate and water. Fixed publicity to the freeze/thaw cycle can result in deterioration and, if ignored too lengthy, costly restore.


The flue is the title of the duct or passageway smoke and gasses journey up and exit by means of. When most individuals assume “chimney” they’re referring to the seen brick or stone exterior that homes the flue. Most frequently made from baked clay, flues may also be made from stainless-steel.

Flue Lining:

The inside lining of a masonry chimney is the flue lining. The liner protects the chimney partitions, and finally your private home, from warmth and corrosion. Linings could be composed of ceramic, metallic or clay.

It is laborious for a typical home-owner to determine broken flue lining. When doing inspections on older properties, like these within the Bowling Inexperienced space, it isn’t unusual to see {that a} hearth has been used when it is posing a significant fireplace danger!

Chimney Damper:

The chimney damper is a movable plate or door, typically made from forged iron or sheet metallic, which, when closed, prevents chilly air or downdrafts from shifting down into the home when no fireplace is burning within the hearth. Usually operated by a cable or lever, any home-owner who has ever forgotten to open the damper previous to beginning a fireplace may even inform you that the damper permits the smoke to rise and escape!

Chimney Crown:

Sealing the highest of the chimney and shedding water away from the flue are jobs carried out by the chimney crown. The crown, generally referred to as the wash, must be sloped downward. This angled design directs rain, and snow because it melts, away from the chimney. A correctly constructed chimney crown is vital in stopping chimney erosion and leaks.

Chimney Cap:

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One of the crucial cheap methods to forestall chimney harm is to put in a chimney cap. A chimney cap, or rain cowl, retains water – and even animals – out of your chimney. Some fashions are designed to rotate, blocking wind gusts. They are often easy or ornamental, however at all times definitely worth the ounce of prevention in opposition to water harm.

Smoke Shelf:

The smoke shelf deflects downdrafts. It additionally prevents rain and soot from falling into the fireside. It’s situated on the backside of the smoke chamber which connects the flue and fireside. In chimneys not geared up with a chimney cap, rain can pool on the smoke shelf and blend with soot. The ensuing acidic combination can eat away at mortar joints.

Key Masonry Hearth Elements


Firebox is the formal title for the within of the fireside – the place you construct the fireplace. In fact, the firebox, composed of firebrick, is designed take the warmth of the fireplace, however water harm, poor building or just simply years of increasing and contracting can take their toll and joints can fail. Common inspections are really helpful.


The fireside is the ground of the fireside, offering a fireproof space on which to construct a fireplace. Usually composed of brick, stone or cement, the fireplace extends past the firebox into the room offering a layer of safety in your dwelling’s ground. Traditionally, meals have been cooked over the fireplace, so a fireplace was massive sufficient to accommodate cooking pots and utensils or perhaps a bench to take a seat and maintain heat. Fashionable hearths nonetheless shield the house from warmth, sparks or flying embers, nonetheless many hearths at the moment are constructed for visible enchantment. Although the ground of the firebox remains to be constructed of fireproof supplies, the a part of the fireplace that extends into the room could also be made from granite, flagstone or marble. Fuel fireplaces don’t require a fireplace until it’s a wood-burning hearth that has been transformed to fuel.

Hearth Doorways:

Hearth doorways are designed to reduce the quantity of air going up the chimney from the room, or an added safety in opposition to chilly air getting into the room when the fireside will not be in use. Additionally they shut off the air circulation when the fireplace has died down. Not like the pyro-ceramic glass of woodstove doorways, the tempered glass of hearth doorways will not be supposed to take the intense warmth produced when a fireplace is burning. Moreover, if the fireside doorways are closed whereas a roaring fireplace is burning, the amount of airflow is interrupted. This may trigger the temperature contained in the firebox and flue to grow to be vastly elevated. If safety from flying sparks is desired a mesh display screen or curtain is really helpful. They maintain the embers within the hearth and let the warmth cross by means of into your private home. There are a lot of combos of hearth doorways and mesh screens or curtains to supply perform and magnificence in your hearth.

Distinctive Elements of a Fuel Hearth

Fuel fireplaces might not require a fireplace, however glass-fronted home equipment or these with glass doorways are required to have a warning and protecting barrier to cut back the chance of burns. Fuel fireplaces have a number of extra parts that conventional wooden fireplaces don’t.


The thermocouple is a security mechanism that measures warmth. It’s made from two totally different metals similar to copper and iron. Benefiting from {an electrical} impact that happens on the junction between totally different metals, the thermocouple acknowledges if a pilot mild is out because of the lack of warmth. Consequently, it shuts down the gas provide which prevents a buildup of fuel.


A thermopile additionally detects and measures radiant power (warmth) and shuts down the gas provide if the pilot mild goes out, but it surely consists of quite a few thermocouples joined collectively. Thermopiles are bigger, typically measuring about 3/8” in diameter, because of the a number of thermocouples wired collectively inside. Understand that whether or not your fuel hearth has a thermopile or thermocouple, common upkeep is really helpful. They work greatest when clear and don’t final without end.

Pilot Gentle:

A constantly burning mild, the pilot mild is used to mild a bigger burner when wanted. That small, blue flame ignites the fuel that’s launched when a furnace or hearth is turned on. If the pilot mild goes out, your hearth is not going to mild. The pilot mild and thermocouple (or thermopile) work collectively to maintain your private home secure and your hearth in working order. If you need to relight your pilot mild and it received’t keep lit, there’s a superb likelihood it’s time to exchange your thermocouple.

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Fireplaces, whether or not fuel or wooden burning, are cozy, long-lasting and add worth to your private home. With care and common upkeep, they will present a lifetime of enjoyment.

Now Is a Nice Time for a Chimney Inspection – Contact Physician Flue!

If in case you have questions on your hearth or chimney, contact us at this time! We provide chimney companies and merchandise in Michigan and Ohio and may also help you keep away from widespread chimney dangers so you may have peace of thoughts.

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