Gas Inserts

Most existing wood-burning masonry fireplaces can be converted to gas with a properly sized insert, but there are a few factors a technician needs to evaluate first.

The fireplace opening dimensions need to match the insert being considered since inserts come in a range of sizes. The existing flue typically needs to be fitted with a new liner that accommodates the insert's direct vent system since the original flue was designed for wood combustion.

A certified technician will also verify clearances from combustible materials and confirm the fireplace structure is sound. Prefabricated or factory-built fireplaces can sometimes also accept inserts, though compatibility varies by manufacturer.

The best way to confirm whether your specific fireplace is a good candidate is to schedule a free estimate with us on our website or by calling (517) 750-0300.

A gas fireplace insert is a self-contained gas heating unit designed to fit directly into an existing wood-burning fireplace opening.

It essentially transforms a drafty, inefficient masonry fireplace into an efficient, controlled gas heating appliance. The insert slides into the firebox and connects to your home's gas line or propane supply. A direct vent liner runs through the existing chimney to handle combustion air intake and exhaust.

The result is a sealed, high-efficiency heating unit that looks like a traditional fireplace from the room but operates with the convenience and efficiency of a modern gas appliance. T

he Grate Haus carries gas inserts from Heat & Glo, Mendota, Majestic, and Superior, and can help you find the right fit for your existing fireplace opening.

Gas inserts offer a significant upgrade over traditional wood-burning fireplaces in almost every practical category.

Efficiency is the biggest difference: a wood-burning fireplace typically loses 80 to 90% of its heat up the chimney, while a quality gas insert converts 70 to 85% or more of its fuel into usable room heat.

Convenience is another major benefit since gas inserts ignite instantly with a switch or remote, maintain a consistent flame and temperature, and require no wood splitting, stacking, or ash cleanup.

They eliminate the smoke, sparks, and creosote buildup that come with wood burning, which means no chimney sweeping required.

For Michigan homeowners who want a functional, reliable heat source rather than just occasional ambiance, a gas insert is a significant practical upgrade to an existing fireplace.

A gas insert can serve as a meaningful supplemental heat source and, depending on its BTU output and your home's layout, can heat a substantial portion of the home through zone heating.

Smaller inserts in the 15,000 to 20,000 BTU range work well for a single room or smaller living areas.

Mid-range inserts at 25,000 to 35,000 BTUs can effectively heat larger rooms or open floor plans.

Large inserts with 40,000 or more BTUs can serve as the primary heat source for a significant area and reduce the load on your central heating system throughout the home.

Zone heating with a gas insert, where you heat the rooms you occupy most and set back the central thermostat, is a popular strategy for reducing heating bills in Michigan during the long winter season.

The team at The Grate Haus can help you match the right BTU output to the space you want to heat.

The total cost of a gas insert installation depends on the insert model, size, BTU output, and the condition of the existing fireplace and chimney.

The insert unit itself typically ranges from $1,500 to $4,000 depending on the brand, features, and output level.

Installation, which includes liner work through the existing chimney and gas line connection, generally adds $500 to $1,500 to the total project cost.

The full installed cost for most gas insert projects falls in the $2,500 to $5,500 range, with premium high-output models from brands like Mendota potentially running higher.

The Grate Haus offers free estimates so you get a clear, detailed quote specific to your fireplace and home before any commitment is made.