Zero Clearance Fireplaces Buyer's Guide

Fireplaces are timeless. Despite new ways of cooking and heating, they remain a staple in living rooms across America. Not only are they good for warmth and decor, fireplaces also add resale value to your home. And with so many fuel options and sizes, you can find just the right one to suit your personal style.

Zero clearance fireplaces are built to allow for installation next to combustible material. This versatility comes from added insulation that keeps the outer surface of the appliance from getting too hot.

Zero clearance fireplaces are operable with a wide range of fuel options like wood, gas, or ethanol. You can even get an electric version if you'd like!

And the style options? We've got you covered. A ZC fireplace can come in a vast range of configurations and styles. Browse options from rustic to modern and everything in between.

Now that you know there are tons of options, your next question might be, "Which one is right for me?" In this article, we'll break down all the details, so you know what is available and what is best for you. We'll also cover some top brand recommendations and maintenance tips.

What is a Zero Clearance Fireplace?

"Zero-clearance" refers to the clearance space needed between the firebox and combustible material. Zero clearance fireplaces are insulated so they can come into direct (or very close) contact with combustible material. They require less space for installation and are more versatile than traditional fireplaces.

Some models function as a sophisticated version of a fireplace insert. The primary difference between inserts and a zero clearance wood burning fireplace is the size. Inserts are typically smaller since they fit inside an existing fireplace.

They come in shapes such as square, rectangular, or arched. You can also select whether you want a see-through, peninsula, corner, wall-mount design.

Pros:

• You can choose your fuel type. They come in wood-burning, natural or propane gas, ethanol, or electric models. ZC fireplaces offer better efficiency than traditional wood-burning fireplaces, which are notorious for their heat loss. Zero clearance fireplaces (especially high-efficiency ones) keep the heat in your home.
• They are incredibly versatile. Because the insulation protects the surface from getting too hot, they can be installed almost anywhere. In many cases, they are even suitable for mobile homes.
• The installation is cost-effective. Without the need for a hearth and masonry buffer, zero clearance fireplaces are easier and cheaper to install. The venting is also less complex and easy to install.

BioFlame Wall Mount Gas Fireplace

Cons:

• Make sure you get the right size. If the fireplace is too big for the room, you will end up spending money on wasted fuel. A general rule of thumb is for the fireplace width to have an inch for every square foot of the room. (You may need to tweak this rule to fit your room configuration and climate.)
• If you don't do it right, the fireplace can look fake. Because they don't need masonry or a hearth, it's possible to put them into place without much forethought. Unfortunately, the lack of any surround or mantle can make it look far less authentic. Adding a few thoughtful details will go a long way toward enhancing the aesthetic.

Types of Zero Clearance Fireplaces

Many factory-built fireplaces fall into the category of "zero clearance". Below is a summary of the options based on fuel type.

Wood-Burning

Wood-burning zero clearance models come in three main categories. Standard prefabricated fireplaces are open-faced and made of steel or sheet metal. Another option is a modular masonry fireplace. These units are less common but look more like traditional wood burning fireplaces. Finally, high-efficiency units feature a closed front and function like a wood-burning stove.

Open-faced prefab models are inexpensive and easy to install. The firebox on these units is contained within an outer metal chassis. This "box within a box" lets you install the fireplace directly against combustible surfaces. The clearances are built into the unit itself.

Napoleon High Country Wood Burning Fireplace

Modular masonry fireplaces come disassembled in multiple cast stone or cement pieces. These fit together in a predetermined arrangement. Often, the cement or stone is thick enough that no extra air space clearance is required. (Occasionally the manufacturer will specify additional clearances.)

The modular and prefab models are great if you value dramatic flames over efficiency. But if heating capability and low emissions is a priority, consider a high-efficiency model.

Osburn Horizon Wood Burning Fireplace

The high-efficiency models have a smaller firebox and a sealed front. The viewing area is smaller, but they are more efficient. This improves not only the heat retained in the room but also the air quality. These high-efficiency units are limited to wood fuel. Unlike the modular and prefab models, they cannot be converted to gas.

Check out this article for more information on wood-burning zero clearance fireplaces.

Configurations

Wood-burning prefab fireplaces come in standard and built-in styles. They are also available as see-through models. This design allows you to enjoy the fireplace from both sides. Although wood-burning fireplaces don't have as many configuration options as their gas-burning counterparts, there are still several ways to bring out your unique style.

Consider adding decorative doors, surrounds, or a mantle to help anchor the fireplace and give it the style and character of your home.

Venting Options

Prefab and modular masonry wood-burning fireplaces use a Class-A (air-cooled) chimney system. The venting requirements are often model specific. In general, the design is a double or triple-walled vent pipe with various connectors to route the pipe to the outside termination. You can check out our Chimney Pipe Buying Guide for more detailed information.

High-efficiency wood burners use a variety of insulated chimney systems. A few of these systems are also convertible to an air-cooled chimney. There is also a selection of models approved for use in mobile homes.

Natural or Propane Gas

Gas-burning fireplaces come in both modular masonry and prefabricated models. These are similar to the ones for wood-burning fuel. In fact, many of the prefab or modular masonry wood-burning units can be converted for use with gas logs. The major difference is the number of configuration and style options available.

Gas fuel allows for a number of extra configurations. In addition to standard and built-in models, gas fireplaces come in corner, linear, peninsula, see-through, and wall-mount configurations.

There are also a host of decorative options like fire media and surrounds to customize your fireplace.

Venting Options

• B-Vent uses a double-wall vent pipe and vents vertically to the roof. It is suitable for both indoor and outdoor applications and is designed to work with prefab models.
• Direct vent is for indoor fireplaces only but offers incredibly versatile venting. The coaxial vent pipe (a pipe within a pipe) can vent horizontally, vertically, or a combination of the two. Direct vent is compatible with corner, linear, peninsula, see-through, standard, and wall-mounted configurations.
• Vent-free fireplaces are unique in that they burn so efficiently that they do not require a venting system. They are perfect for situations where adding a vent would be difficult or costly. Some models are even rated for use in bedrooms and bathrooms. They are also suitable for both indoor and outdoor use.

They vent directly into the room, so although they produce minimal exhaust, there are some restrictions based on local ordinances, elevation, or room size.

Want more information? Read our guide to gas fireplaces.

Electric

Electric fireplaces are as versatile as they come. And thanks to improved technology, today's models offer a much more authentic, vibrant flame. You can install electric fireplaces in bookcases, media centers, peninsulas, and more. They can be free-standing, wall-mounted, or built into the wall beneath a mantle. All you need is the proper electrical source.

Napoleon Cinema Electric Fireplace

The maximum output for electric fireplace models is 9,000 BTU. However, some models do not come with a heating element and do not emit any heat. Electric fireplaces also come in outdoor models.

You can find more details on the models available in our electric fireplaces guide.

Ethanol

Ethanol fireplaces are unique in that they offer real flames without the need for venting or a gas line. Instead, the fireplace burns bioethanol fuel that produces no smoke or harmful byproduct. Many are approved for bathrooms, bedrooms, and mobile homes.

Miramar Residence Lorenzo Gas Fireplace

Styles include freestanding, see-through, standard, and wall-mounted configurations. You also have the option of both indoor and outdoor applications. The maximum BTU output is much higher than electric models, so you'll be able to heat larger spaces.

Care and Maintenance

The maintenance for your zero-clearance fireplace varies depending on the type of fuel. As always, start by reading the manual and follow the manufacturer's instructions. In addition, here are some general tips.

Cleaning out ash from a wood burning stove

For wood-burning models, clean out the ash regularly and inspect the venting to make sure the pipes aren't clogged. (You'll also want to check the pipe termination to make sure no debris has clogged the outlet.)

Gas-burning units require less maintenance, but you'll still want to keep dust from building up on the major components. Use a vacuum to clean out accumulated dust or pet hair from the firebox, burner, and other components.

You can also use a bottle of compressed air to clean dust from the crevices of the fireplace or ceramic logs. At least once a year, inspect the gas line system to make sure everything is working properly.

Vent-free and electrical fireplaces are famously low maintenance. Dust them regularly (especially the vent-free models) and follow any extra care instructions in the manual.

Shipping

Freight truck on a highway

Wood and gas-burning fireplaces are heavy and will ship via LTL (less than truckload) freight. Most vent-free units will also ship by freight. You will need to schedule a delivery and arrange to have another person or two home with you to accept the shipment. Always inspect the unit for any damage or missing parts before signing off on the delivery.

Smaller electric models will ship using normal parcel post. Larger models may ship via freight. This is because the awkward size is more susceptible to damage.

Summary

More and more homeowners are moving away from traditional site-built fireplaces and choosing zero clearance models. With lower installation costs, higher efficiency, and beautiful style, the combination is hard to beat! The model variety lets you choose whatever fuel you prefer and select a configuration that best fits your space.

Got questions? Our NFI Certified Technicians are happy to help!