Replace Your Cedar Park Gas Wall or Floor Furnace With a Ductless Mini Split

Updated September 2026 · ATX Mini Split King, Austin and Central Texas

If you live in Cedar Park and still heat and cool your home with an old gas wall furnace or floor furnace, you have likely wondered about switching to a ductless mini split. This page explains exactly what that involves, what it costs, and when it makes sense or does not. We serve Cedar Park as an independent HVAC and electrical contractor.

Flat pricing, everything included

Those are materials and labor together, wired to code by a TDLR licensed contractor. Anything non standard gets quoted first, before a single tool comes out of the truck: a very long line set, an electrical panel that needs work, a difficult mount, a roof or masonry penetration, disposal of the old equipment. You hear the number before we start, not after.

What a Gas Wall or Floor Furnace Actually Is

A gas wall furnace or floor furnace is a self contained heating unit that burns natural gas or propane. It is usually mounted in a wall between rooms or set into the floor. These units draw air from the room, heat it over a gas burner and a heat exchanger, then blow it back out with a small fan. They have no ductwork. They heat only the room they are in, or maybe two rooms if the wall is thin and the grilles are open on both sides. In Cedar Park, you find them in older homes built in the 1950s through 1970s, especially in the older neighborhoods near the original downtown area, in smaller ranch houses and some mid century additions. They were common because they were cheap to install and did not require a central furnace or duct system.

A ductless mini split works differently. It has an outdoor compressor unit and one or more indoor air handling units mounted high on a wall. A small refrigerant line and a condensate drain run between them through a 3 inch hole in the wall. The indoor unit blows cool or warm air directly into the room. It does not burn gas. It runs on electricity. It can heat and cool, and each indoor unit can be controlled separately. That means you can heat or cool only the rooms you use, which saves energy.

Honest Pros of a Gas Wall or Floor Furnace

These old systems have real strengths. They heat a room fast. Gas heat is hotter than the air from a heat pump, so on a cold Cedar Park morning the room warms up quickly. They are simple machines with few moving parts. Many have lasted 30 or 40 years with basic maintenance. They do not rely on electricity for the heat itself, so during a power outage the furnace still works if it has a standing pilot or a battery powered ignition. That matters in Central Texas when winter storms knock out power. They also take up no floor space and do not need an outdoor unit. For a small home or a single room, a wall furnace can be a perfectly adequate heating solution.

Another honest pro is cost. If the unit is still working and safe, repairing it is often cheaper than replacing it with anything else. Replacement parts for common models are usually available. And because it heats only one space, you are not wasting energy on empty rooms. For a homeowner on a tight budget or someone who only needs heat a few months a year, keeping the old furnace running makes sense.

Honest Cons and Limits of a Gas Wall or Floor Furnace

The biggest limit is that these units do not cool. In Cedar Park, where summer temperatures stay above 90 degrees for months, that is a major drawback. You either need window units, a separate central air system, or you sweat. They also heat unevenly. The room with the furnace gets hot, but adjacent rooms stay cold. They can be a safety concern if not maintained. Cracked heat exchangers can leak carbon monoxide into the home. Floor furnaces are a tripping hazard and a burn risk for small children and pets. They also take up usable floor space in the middle of a room.

Another limit is efficiency. These old furnaces waste a lot of heat up the flue. They have no fan to circulate air beyond the immediate area. And because they burn gas, they add moisture and combustion byproducts to the indoor air unless they are vented properly. In a tightly sealed modern home, that can cause indoor air quality problems. They also require a gas line, which means you pay the gas utility base fee even if you only use it a little.

Signs Your Gas Wall or Floor Furnace Is Failing

Look for yellow or flickering flames. A healthy gas flame is mostly blue. Yellow flames mean incomplete combustion and possible carbon monoxide. Soot around the burner or on the wall above the unit is another warning sign. If the unit takes longer to heat the room than it used to, or if it cycles on and off too often, the heat exchanger may be clogged or damaged. A musty smell when the furnace runs can mean dust burning off, but a persistent gas smell means a leak. Any of these call for immediate attention.

Physical signs matter too. Rust on the cabinet or around the flue, cracks in the heat exchanger visible through the grille, or a floor furnace that has settled and is no longer level. If the pilot light goes out repeatedly, or if the unit makes popping or rumbling noises, those are signs of internal damage. In floor furnaces, if the grate is loose or the metal around it is corroded, the whole assembly may need replacement. When a unit is more than 25 years old and showing any of these signs, replacement is usually more practical than repair.

What a Ductless Mini Split Replacement Involves

The crew will first disconnect and remove the old gas furnace. That means capping the gas line, disconnecting the flue, and pulling the unit out of the wall or floor. The opening it leaves behind will be patched and finished to match the surrounding wall or floor. This is usually done by our crew or a subcontracted handyman, and the cost is included in our flat pricing. The old gas line is capped and left in place or removed depending on access. Then we mount the outdoor compressor unit on a concrete pad or wall bracket outside, typically on the side of the house or in the backyard.

Inside, we mount the indoor unit on an exterior wall near the old furnace location. We drill a 3 inch hole through the wall for the refrigerant lines, power cable, and condensate drain. The line set and drain run outside to the outdoor unit. The drain needs a slight downward slope so water flows out. Electrical work involves running a dedicated circuit from the panel to the outdoor unit. If your panel has room for a new breaker and the wiring is adequate, this is included. If you need a panel upgrade or a long line set, that is quoted before work starts. A typical one head installation takes one full day. Two or three heads take a day and a half to two days.

When Not to Switch to a Mini Split

Do not switch if your gas furnace is less than 10 years old and works well. Repairing it is cheaper than replacing it. Do not switch if you have an existing ducted system that works for cooling and you only need heat for a few weeks a year. A gas furnace will heat faster and cost less to run in that short window. Do not switch if you cannot place the outdoor unit somewhere acceptable. Some Cedar Park homes have small lots with strict HOA rules about where compressors can go. If you cannot get a line set to the outdoor location without a long exposed run, the added cost may not be worth it.

Also consider waiting a season if your current furnace is still safe and you are not ready to spend the money. A mini split is an investment. If you plan to sell your home within two years, a working gas furnace is not a dealbreaker for most buyers. And if your home has multiple rooms that need heating and cooling, a single mini split will not cover them all. You would need multiple heads, which raises the cost. In that case, a ducted system or a hybrid approach might serve you better.

Questions people actually ask

Do you remove the old gas line when replacing a wall furnace?

We cap the gas line at the unit and at the meter or nearest accessible point. We remove the exposed pipe if it is easy to access. Buried or in wall gas lines are left in place and capped. This is safe and standard practice. If you want the line fully removed, that requires additional work and is quoted separately.

Can a ductless mini split heat a room as well as a gas furnace?

It can heat the room, but the air coming out is not as hot as gas heat. On a very cold morning, a mini split takes longer to warm the room. In Cedar Park winters, this is rarely a problem because temperatures rarely stay below freezing for long. For most homes, a mini split provides comfortable heat.

Will the patch where the old furnace was look obvious?

We patch the opening with drywall or plywood and texture to match the surrounding surface. We do not paint. You or a painter will need to paint the patch to match. The patch is flush and smooth, but the texture may not be an exact match unless you have a painter blend it.

What if my Cedar Park home has no outdoor wall where I want the indoor unit?

The indoor unit needs to go on an exterior wall so the line set can reach the outdoor unit. If the room you want to cool has no exterior wall, we can run the line set up into an attic and out a soffit or gable. This adds cost. We will quote that before work starts.

Do I need to upgrade my electrical panel for a mini split?

Most homes in Cedar Park have enough capacity for a single mini split. If your panel is full or if you have an older 60 amp service, you may need a panel upgrade or a subpanel. We inspect the panel during the quote. If an upgrade is needed, we quote it before work starts. Our flat pricing assumes a standard panel with an open breaker slot.

Keep reading

Every replacement guide we have written is listed on the replacement guide hub. Next door to this page: replacing a gas wall furnace or floor furnace with a ductless mini split in georgetown, replacing a gas wall furnace or floor furnace with a ductless mini split in pflugerville. Pricing, service area and the quote form all live on the ATX Mini Split King home page, and the Austin mini split cost guide covers what the rest of the market charges.