A Jacksonville furnace job, from the phone call to the first cold snap
Jacksonville gets about fourteen freezes a winter. That is enough to make a furnace worthwhile in a gas-served historic home, and not nearly enough to justify one anywhere else.
Day one: the call from Springfield
A furnace job in this market almost always starts the same way. A homeowner in one of the gas-served historic districts, Springfield, Riverside, Avondale, Ortega, Murray Hill, calls in late November because the heat came on for the first time and smelled wrong, or never came on at all. The house is a 1910s Craftsman or a 1920s Mediterranean Revival, and a gas furnace was tucked into a closet decades ago when someone finally added ducts.
That first call takes ten minutes. We ask the fuel (TECO Peoples Gas meter or propane tank), the age if it is known, the symptom, and where the unit sits in the house. Then we schedule a visit, same day when the heat is out entirely, because December in Jacksonville does bring nights near freezing.
Day one, afternoon: the diagnosis
A furnace that has sat idle since March is checked for the things idleness causes: a cracked heat exchanger, a failed ignitor, a flame sensor coated in a year of dust, a flue blocked by whatever nested in it. If the furnace is under about fifteen years old and the heat exchanger is sound, we repair it and leave.
If the exchanger is cracked, repair is off the table and the conversation becomes a replacement, which brings up what has changed.
What has changed in furnaces lately
- Efficiency floors rose. New gas furnaces are built to higher minimum efficiency than the units installed in the 1990s and 2000s, and condensing models vent through PVC rather than a masonry chimney, which matters in a Springfield house whose chimney may not be lined.
- The cooling side moved first. The SEER2 rating method and the shift to new refrigerants changed the air conditioner that sits on top of the furnace. A furnace replacement is the moment to match the coil and condenser to the new rules, not fight them.
- Dual-fuel got practical. Modern heat pumps carry most of a Jacksonville winter alone; the furnace becomes a backup for the dozen hard nights. Many of our furnace quotes now come with a heat pump alternative on the same sheet.
Who should buy a furnace here, and who should not
Buy one if gas service is already at the house, the ductwork is in decent shape, and you prefer the warm, fast heat a furnace delivers on a 28-degree morning. Historic-district owners with radiators that were converted to forced air generations ago fall in this group.
Skip it if the house has electric service only. Running a gas line to a 1960s Arlington ranch or a 2005 Oceanway two-story just to install a furnace rarely pays back in a climate with roughly three hard freezes a winter. A heat pump does the same job for less.
Think twice if you are on propane in Bryceville or out past Baldwin. Propane furnaces work, but fuel cost swings and delivery logistics make a heat pump the steadier choice for most rural homes.
Install week, in order
- Load calculation and combustion check on the house, not a swap by nameplate.
- Permit pulled through the City of Jacksonville or the relevant county.
- Install day: old furnace out, new unit set, gas piping and venting run to code, coil matched if the air conditioner is changing too.
- Commissioning: gas pressure, temperature rise, carbon monoxide readings at the registers, and a static-pressure test on the ductwork.
- Inspection scheduled, and the homeowner shown the filter and the shutoff.
Monthly payment plans cover a new furnace, and the quote is free. Gas-side work on historic homes occasionally reveals piping that needs TECO Peoples Gas involvement; where that applies we say so up front.
Furnace questions from the gas-served parts of town
How do I find out if my street has natural gas?
TECO Peoples Gas runs the distribution system in Jacksonville. If neighbors have a gas meter mounted on their wall, the main is probably on your street; if not, a propane tank is the only furnace option and we will usually steer you to a heat pump instead.
Can a furnace and a heat pump work together?
Yes. A dual-fuel setup runs the heat pump on mild nights and switches to the furnace when it gets genuinely cold. In a city with few hard freezes, it is worth pricing against a plain heat pump before deciding.
Do you install furnaces in Baker or Nassau County?
We do, from the Palm Coast headquarters. Rural lots out toward Macclenny and Callahan are often propane or electric-only, which changes the recommendation, so tell us the fuel situation when you call.
What happens to my furnace during hurricane season?
Nothing, provided the flue and the combustion-air path stay clear. After a multi-day outage we check that the ignition control and inducer motor came back cleanly before the first cold night.
Think you're one of the gas-served few?
Call {{phone}} with the address. We'll confirm the fuel and tell you whether gas heat or a heat pump is the honest answer.