Wood Stove vs Fireplace Insert: How to Choose

How each one gives off heat

A stove stands out in the room. Its steel or cast iron body heats up and radiates in every direction, and the stovepipe adds a bit more. Air moving around it carries heat into the room by convection too, and many stoves have outer jackets that boost that effect. An insert sits inside the firebox, so its back and sides face cold brick. Most of its heat comes out of the front glass and, on many models, a blower that pulls room air through a jacket around the firebox and pushes it back out warm.

For efficiency, both are a big step up from an open fire. The difference is mostly about where the heat goes. A stove sitting in the open usually warms more of a room or an open floor plan. An insert relies more on its fan and does its job in the room it faces, and it may lose some heat into the surrounding masonry, especially on an outside wall.

Space, look and where it can go

An insert uses space you already have. There is nothing new on the floor, and the mantel and surround stay, with a surround panel closing the gap around the insert. A stove needs a noncombustible hearth pad and clearances to walls and furniture listed by its maker, so it takes real floor space. In return, a stove can go in front of a fireplace, in a basement or in a room with no fireplace at all, as long as it can be vented properly.

• Insert: fits the existing firebox, keeps the room layout
• Stove: needs floor protection and clearances, but more placement options
• Stove in front of a fireplace: vents through the fireplace with a connector and liner
• Stove with no fireplace: needs a chimney or a listed factory-built chimney

Side by side

The table sums up the practical differences most homeowners weigh.

The chimney work each one needs

An insert nearly always needs a stainless steel liner running from its flue collar to the top of the chimney, sized to the insert's outlet as its manual requires, often insulated. The old damper usually comes out or is fixed open, and the top is sealed around the liner with a plate and cap. Without that liner, the insert's smoke would enter a large, cold fireplace flue, cool quickly and coat it with creosote.

A stove venting into a masonry chimney connects through a stovepipe and a thimble, or through the fireplace opening, and in many older chimneys it also needs a liner sized for the stove. A stove in a room with no chimney gets a new factory-built chimney, run through the wall or roof as its instructions require. In each case the chimney is swept and inspected first.

What older fireplaces need to check

Many fireplaces in older homes across the region were built for coal or for small fires: shallow fireboxes, small openings and narrow flues. Before choosing an insert, measure the opening's width, height and depth, since many inserts need more depth than an old coal firebox offers. Check the hearth extension in front, which must meet the insert or stove maker's floor protection requirements, and the clearance from the opening to the mantel and trim.

A stove placed in front of a shallow fireplace can avoid the depth problem, but the hearth must be large enough for the stove's floor protection.

What installation looks like

For an insert, the visit starts with a sweep and inspection of the fireplace flue, then the damper is removed or fixed open, the liner is lowered from the roof, connected to the insert and sealed at the top with a plate and cap. The insert is slid into the firebox, leveled, connected and closed in with its surround panel. The first fires are kept small while paints and materials cure, and the manual usually describes this break-in.

A stove installation adds work in the room: setting a hearth pad that meets the stove's floor protection, checking clearances to walls and furniture, and running a connector to the chimney through a thimble or the fireplace opening. Where there is no chimney, a factory-built chimney system is run through the wall or roof, with its own supports, flashing and cap.

In both cases, ask for the stove or insert manual before the visit and keep it afterward. The manual sets the liner size, clearances, floor protection and break-in steps, and it is the reference for any future inspection.

What drives the cost

Neither choice has a set price. The unit itself, the length and grade of the liner, whether insulation is required, how hard the roof is to reach, repairs the chimney needs first, and hearth work or permits all move the number. A stove with no existing chimney adds a new chimney system. An insert in a fireplace with a sound chimney is often the simpler job.

Burning well in either one

Both appliances are designed to burn dry wood hot and then settle into a controlled burn. Running them turned right down on wet wood makes heavy creosote in the liner, and closed appliances do this faster than open fireplaces. Load dry, split hardwood, let the fire burn briskly after each reload, and have the liner inspected yearly and swept when deposits build up, as NFPA 211 calls for. Keep CO and smoke alarms working on each floor.

How to decide

If you love your fireplace and want it to heat, an insert is usually the natural fit. If you want the most heat into an open living area, want heat during power outages without a blower, or you have no usable fireplace, a stove is worth a look. Either way, the chimney should be inspected before you buy, since it decides what can be installed. A written answer with upfront pricing and no hidden fees makes the comparison straightforward. Check with your local building department about permits for either installation.