Commercial Furnace Replacement Cost in Arlington, TX

Replacing commercial heat in Arlington is not a house furnace bid with a different cover page. The number depends on what is actually heating the building. A unit heater over a shop bay, a ducted furnace in a small office, and the gas section of a packaged rooftop unit are three different jobs. Two of them do not even use the same published price bands.

The figures below come from published industry guides. They are not an Arlington price, and they are not a Boost Air quote. Crane access, gas piping, venting, and whether the space can be down on a weekday move the quote after someone has seen the unit. A free replacement estimate is how you get a number for your building.

Boost Air And Plumbing replaces this equipment on smaller buildings: packaged rooftops, commercial split systems, and unit heaters. We do not install or repair chillers. If the unit is already down and you are deciding on a repair first, start with commercial furnace repair in Arlington.

If you smell gas (a rotten egg odor), do not shop for a replacement from inside the space. Get people out, avoid switches if the smell is strong, and call the gas utility or 911 from outside. If a carbon monoxide alarm sounds, or anyone has a headache, nausea, or dizziness that eases outdoors, get people outside and call 911. A failed heat exchanger is a reason to leave the unit off, not a reason to keep it running until the new one arrives.

Two published bands, for two kinds of equipment

Guides mix these together. Separating them is the useful part.

Hanging gas unit heaters. WarehousingCosts' 2026 warehouse HVAC guide lists a gas-fired unit heater at about $2,500 to $8,000 each installed, as the heater used in dry warehouse and shop bays. That is a published planning range, not a price for your bay and not a Boost Air quote. One heater in a small shop is not a row of heaters in a large warehouse. Gas piping that has to be extended, a flue that cannot be reused, a high mount, and electrical work for the fan and controls all move the number. Several heaters on one job are not "the single-unit range times eight" until the gas supply and the venting are counted once for the building and again for each unit.

Packaged rooftop units that heat and cool. When the heat exchanger fails and the practical replacement is the whole cabinet, you are in rooftop territory, not unit-heater territory. Recent guides often land a small packaged unit around 5 tons somewhere between about $7,000 and $15,000 installed, and some go higher once a crane and a curb adapter are included. A 10-ton unit is often quoted from the mid-teens into the $20,000s or beyond. A 5 to 10 ton changeout is sometimes summarized as roughly $10,000 to $25,000. Those are the same industry ranges we use in commercial AC replacement cost in Arlington. They are not an Arlington price and not a Boost Air quote. The cooling tonnage, the curb, and the crane are on that quote even if the complaint that started the job was "no heat."

Use the bands to tell a serious bid from a guess. Do not hand a landlord the midpoint and call it the budget. The written quote, after someone has been on the roof or under the heater, is the number.

A heat exchanger or gas-section replacement, without changing the whole cabinet, is not a figure these guides isolate cleanly. We do not invent one. On a younger unit with a sound cabinet and parts available, it can be a repair. The price comes after the unit is opened. If the quote for that part is a large share of a new unit, you should see both numbers before you choose.

What moves the price

Which piece of equipment. A unit heater quote that is compared to a rooftop quote will look "too low" or "too high" for no good reason. Make and model, input BTU, and whether cooling is included should be the first lines.

Venting. The new heater has to exhaust outdoors. A flue that is reused, a flue that is replaced, and a separated-combustion heater that needs both intake and exhaust are different scopes. A unit that spills combustion products into a bay is not a candidate to "run until spring." Leaving a bad exchanger in service is not a savings.

Gas piping. The connection at the unit, the shutoff, and whether the meter and the pipe can feed the new input. An undersized line is not something to discover after the heater is hanging. Gas work that belongs to the equipment should be on the quote.

Airflow. A rooftop still needs the blower, the filters, and the ducts at the curb to move air across the heat exchanger. A unit heater needs a fan that is not seized and a mount that lets it throw air. Closed fire dampers and crushed ducts make a new heat section behave like a small one. Commercial HVAC repair and installation should call that out before the equipment is ordered.

Curb, crane, and electrical, when the cabinet is a rooftop. Those lines are why a "furnace" replacement on a roof does not match a unit heater. A curb that does not fit needs an adapter or a new curb. The crane has to set from somewhere the truck can actually park. The disconnect and the wire have to match the new unit. The rooftop cost guide walks through those drivers. They apply here whenever the replacement is the whole packaged unit.

Controls. A single commercial thermostat is one price. Tying the heat into a building controller is another. An economizer left unplugged on a new rooftop wastes a feature you paid for. Say which system the space uses.

When the work can happen. Before open, after close, or a Sunday with the doors locked is a labor line. A mild weekday with an empty suite is a different line. Say which hours the space can be without that unit before the bid is written.

Permit. Arlington requires a permit for this kind of mechanical replacement. The city sets the fee. It belongs on the quote, with the contractor who pulls it named.

Repair or replace

Replace, or price a replacement beside the repair, when:

• The heat exchanger is cracked, rusted through, or spilling exhaust
• The cabinet is rusted through or the flue cannot be made sound
• The unit is around 15 years old and a major section has failed
• Parts for the failed section are no longer available
• The same overheating shutdown returns after filters, belts, and vents are corrected

Repair when a sensor, igniter, gas valve, or fan motor failed and the exchanger, cabinet, and vent are sound. Commercial furnace repair in Arlington is that visit. You should hear the diagnosis and the price before parts are replaced. A free replacement estimate is the parallel path when the exchanger or the cabinet is the problem. The same replacement decision for a Grand Prairie rooftop, split, or unit heater is commercial HVAC replacement in Grand Prairie.

Maintenance is what keeps a unit on the long end of its life after it is in. Commercial furnace tune-up in Irving describes the heating check. Commercial HVAC maintenance starts with a free on-site walkthrough for equipment that is still in service. A unit that is already condemned is not a maintenance sale. It is a replacement.

Install quality, not the badge

The name on the cabinet is a weak predictor of how long commercial heat lasts. The install is the stronger one.

Ask who will do the startup. On a unit heater that means the flue, the gas connection, the fan rotation, and a combustion check. On a rooftop it means the curb seal, the economizer, the charge on the cooling side, the drain, airflow, and a combustion check on the gas section. A new unit that short cycles because it is oversized, or that runs hot because the filters cannot feed it, will disappoint in the first winter regardless of the logo.

Get the labor coverage in writing, separate from whatever parts coverage the manufacturer prints. A low bid that skips the crane, the curb, the permit, or the flue is not finished. The number will move on installation day.

How to read the bids

• Equipment type: unit heater, ducted furnace, or packaged rooftop
• Input and output, and why that size
• What happens to the old flue, curb, or hanger
• Gas piping and shutoff
• Electrical changes
• Crane, if anything is going to the roof, and where the truck sets
• Controls or economizer
• Permit and who pulls it
• Hours the building will be without that unit
• What is hauled away
• Labor coverage in writing

A bid that cannot answer those lines is not comparable to one that can.

Free replacement estimates

Talk with a knowledgeable North Texas comfort advisor about your replacement options. Free estimates, no pressure.

Boost Air And Plumbing replaces commercial gas heat for smaller buildings in Arlington and nearby North Texas communities. We do not install or repair chillers. See our commercial HVAC repair and installation service and HVAC service in Arlington. Call (817) 612-9107 or book online. Hours are Monday through Saturday, 8am to 7pm, with after-hours and Sunday emergency appointments available.

Frequently asked questions

How much does commercial furnace replacement cost in Arlington? Published guides do not agree on one number, and a shop bay is not a national average. WarehousingCosts' 2026 warehouse HVAC guide lists a gas-fired unit heater around $2,500 to $8,000 each installed. A packaged rooftop that heats and cools is a different job. Recent guides often put a small unit around 5 tons somewhere between about $7,000 and $15,000 installed, and a 10-ton unit from the mid-teens into the $20,000s or beyond. A 5 to 10 ton changeout is sometimes summarized as roughly $10,000 to $25,000. Those are industry ranges, not an Arlington price and not a Boost Air quote.

Is replacing a unit heater the same price as replacing a rooftop unit? No. A hanging unit heater heats one bay and does not need a roof curb or a crane. A packaged rooftop replaces cooling and heating together, and the crane, the curb, and the electrical circuit move the price as much as the heat section does. Line the quotes up by equipment type before you compare them.

Can you replace only the heat exchanger? Sometimes, on a younger unit with a sound cabinet and parts still available. Published guides rarely separate that part from a full unit changeout, so we do not treat a national average as the price. The number comes after the unit is opened. If the exchanger, the cabinet, and the cooling section are all failing, replacing the cabinet is often the clearer scope.

Does the brand decide how long a commercial furnace lasts? No. Venting, gas piping, airflow, and whether the heat section short cycles matter more than the name on the cabinet. A unit heater with a flue that drafts and a filter or blower that can move air will outlast a premium rooftop that was set on a curb, left with the economizer unplugged, and never checked. Ask who is doing combustion setup and startup before you compare badges.

Do you replace chillers or boiler plants? No. Boost Air And Plumbing does not install or repair chillers. Commercial furnace replacement here means gas heat on packaged rooftop units, ducted commercial furnaces, and unit heaters, including the curb, vent, gas, and electrical connections those jobs actually need.

Will the business have to close for the replacement? Not always. Many changeouts are scheduled before open or on a day that zone can be down. A restaurant or clinic may need the work after close or on a Sunday so people are not in the space while a curb is open or a heater is lifted. After-hours labor is a line on the quote. Say which hours the space can be without heat before the price is written.