Gas heat that keeps up with a Hillsborough County winter.

Costs vary widely based on the unit and the complexity of the venting and gas line work, but most Hillsborough County installations land somewhere between $4,000 and $10,000. A direct-vent insert going into an existing fireplace with a gas line already run to that room is on the lower end. A new built-in gas fireplace for a remodel or addition—with framing, venting through an exterior wall, and a new gas line—sits toward the higher end. Homes relying on propane sometimes add tank installation or line extension costs on top. A local dealer will give you a firm number after seeing your chimney or wall layout in person.

Yes—it's one of the more common projects for older homes in Manchester, Nashua, and the surrounding mill towns, many of which have masonry fireplaces original to the house. A gas insert slides into the existing firebox and vents through the current chimney with a stainless liner, so you keep the look of the original opening while gaining real, controllable heat output. If the home is already on the Liberty Utilities natural gas main, the conversion is simpler and usually cheaper than in a propane household that needs a tank set first.

Either works, and most gas fireplace models can be configured for one or the other with the right orifice and regulator. If you're in the Manchester or Nashua service area and already have natural gas appliances through Liberty Utilities, adding a fireplace on the existing line is usually the more economical route. Homes out toward Milford, Amherst, Wilton, or the Peterborough area that aren't on the gas main typically run on propane, either from an existing tank or a new one set by a local propane supplier. Your dealer will confirm which fuel makes sense for your address before quoting the job.

Most modern gas fireplaces with intermittent pilot ignition (IPI) include a battery backup—typically standard AA batteries inside the unit—that takes over automatically when the power drops, so the fireplace still lights on demand during an ice storm or downed line. Just remember to swap the batteries periodically; they're easy to forget until you actually need them. Valor fireplaces work a bit differently: their pilot's thermocouple generates the small amount of electricity the unit needs, so there's no battery to maintain at all. For Hillsborough County winters, where a Nor'easter can knock out power for a day or more, that kind of outage-proof heat is worth asking about.

A gas fireplace is a fully built-in unit framed into a wall—common in new construction or additions around Bedford, Merrimack, and other growing towns in the county. A gas insert fits inside an existing masonry firebox and uses the current chimney as its vent path, which is the typical route for older homes in Manchester and Nashua's historic neighborhoods. A gas stove is a freestanding unit that sits on the floor, similar in footprint to a wood stove, and works well in a room without any existing fireplace. Which one fits depends mostly on whether you're starting with an existing opening or building from scratch.

Yes, and because New Hampshire handles building permits at the municipal level, the specific office depends on where you live—the City of Manchester Building Safety Division, the City of Nashua building inspections office, or the local building department in towns like Milford, Peterborough, or Goffstown. Every jurisdiction requires a building permit for the installation and a separate permit for any new gas line work, which has to be run by a licensed gas-fitter. A certified local hearth dealer typically handles both permits and coordinates the gas-fitter as part of the job, so you're not left managing two separate trades yourself.

Vented (direct-vent) gas fireplaces pull combustion air from outside and exhaust the byproducts back outside through a sealed pipe—they're the cleanest, safest, and most widely recommended option, and they're what most local dealers install in Hillsborough County. Vent-free units burn fuel directly into the room without any outside venting; they're legal in New Hampshire but come with strict room-sizing requirements and oxygen depletion sensors, and they release some water vapor and combustion byproducts into your living space. For a well-sealed, energy-efficient home in a 5A climate like this one, that added humidity and indoor air quality tradeoff is worth weighing carefully—ask your dealer to walk through both options for your specific room.

Plan on an annual inspection, ideally before the heating season kicks in around late fall. A technician checks the burner, pilot assembly, venting, and any gas connections, and cleans the glass and interior—a much lighter job than sweeping a wood chimney, but just as important for safe operation. Most gas appliance service visits in the Manchester-Nashua area run somewhere in the $150 to $250 range, and the dealer who installs your unit can usually set up ongoing service.

Wood—burned in stoves fed by the maple, birch, beech, and oak common to New Hampshire woodlots—offers real heat output, lower fuel costs if you're cutting or buying local cordwood, and heat that keeps running with no power at all. Gas trades that self-sufficiency for convenience: instant on-off operation, no ash or creosote, and consistent output without tending a fire. In a county this size, plenty of homes end up with both—gas in the main living room for everyday use, and a wood stove in a den, basement, or camp property for backup heat when a storm takes the grid down.

An insert does two things: it seals the chimney completely, so you stop losing air you already paid to heat, and it radiates warmth into the room through the firebox and glass. Most add a heat-exchange fan that pulls cool room air underneath, wraps it around the hot firebox, and pushes it back out warm. Your home is more efficient before you've even lit the first fire.

Open fireplaces suck—literally. As the fire burns, it consumes air your furnace already paid to heat and pulls it out through the chimney, so the house is actually colder after the fire goes out than before you lit it. An insert fixes this: it seals the chimney, puts fixed glass across the front, and turns that hole in your house into a real heat source.

Yes—by creating a comfort zone. A furnace heats every square foot of the house just to warm the one room you're in; a gas fireplace on low burns roughly a sixth of the gas a typical furnace does. Set the furnace around 55–60 degrees as a baseline, then heat the rooms your family actually uses. Families who heat this way commonly save $20–$60 a month.

On average, a fireplace adds back to the home about the same amount you spent installing it. Add the monthly savings from heating the rooms you actually use instead of the whole house—often hundreds of dollars a year—and the value case is strong before you even count what a fire does for how your family uses the room.