A January GRU bill that doubled: when electric strip heat should give way to a gas furnace in Gainesville

The bill that starts it

A homeowner in a 1976 house in Northwest Gainesville opens a January GRU statement and finds the electric usage roughly where it was in August. Nothing changed in the house except the weather. The air handler in the garage has a bank of electric heat strips in it, each one drawing like a stovetop burner, and during the twelve or so freezing nights that month those strips ran for hours at a time.

That is the signature of resistance heat: it works, it is simple, and it is the most expensive way to heat a house per unit of warmth. In most of Florida there is no alternative short of a heat pump. Inside GRU’s natural gas territory there is a second option, and the utility encourages it with a conversion incentive for homes that switch a furnace from electric or oil to gas: $500 toward the first unit, $300 toward an additional one, with a per-location cap and a bonus when several appliances convert.

Whether that switch makes sense for your house depends on what we find.

What we check at the estimate

1. What is heating the house now. Strips alone, a heat pump with strip backup, or an old gas furnace. The first case gains the most from gas; the second often gains more from a better heat pump; the third is a straightforward replacement.
2. Fuel availability. Is GRU gas at the meter, at the street, or not on the block? Rural Alachua County toward Micanopy, Hawthorne and Archer runs on propane, which changes the economics. Alachua and Newberry have their own municipal electric; gas there is a separate question.
3. The ducts. A gas furnace moves hotter air and may need different blower settings or duct corrections, particularly in the 1970s-to-1990s houses that make up most of the city.
4. Venting and combustion air. High-efficiency furnaces vent in PVC through a wall; older closets in Duckpond and Pleasant Street houses need a careful look at where that can go and where the condensate drains.
5. The electrical. A gas furnace needs far less power than strips, which sometimes frees a panel for other uses.
6. The air conditioner. A furnace heats only. The cooling coil sits on top of it, and if the outdoor unit is also aging, a dual-fuel system, a heat pump paired with the gas furnace, may be the better whole-house answer.

What it usually turns out to be

Situation	Our usual recommendation
Strips only, GRU gas available, owner staying long term	Gas furnace, often with the conversion incentive
Strips only, no gas on the block	High-efficiency heat pump; strips become backup only
Aging heat pump, gas available, owner dislikes lukewarm vents	Dual-fuel: heat pump above a set temperature, furnace below
Old gas furnace, sound ducts	Replace with a high-efficiency gas furnace
Old gas furnace, cracked heat exchanger	Replace now; no repair exists
Rental with simple needs	Usually a heat pump; one system, one service call

A furnace is not automatically the right answer in a city with about seventeen freezes a year. A modern heat pump handles most Gainesville winters efficiently; the furnace’s advantage is hotter air, faster recovery and independence from the strips on the hard-freeze nights. The dual-fuel pairing captures both, at a higher up-front cost.

Get a furnace estimate

What goes into the price

Every installation is quoted after the visit, never from the phone. The variables that move it:

• Furnace type. Single-stage, two-stage or variable-capacity gas furnaces from Lennox; the higher tiers run quieter and hold temperature more evenly.
• Efficiency. Standard versus high-efficiency condensing units; the latter need PVC venting and a condensate drain.
• Conversion work. Gas piping from the meter to the furnace location, pressure testing, and GRU’s service activation if the house has never had gas.
• Venting path and location. A garage wall is simple; a historic closet with a masonry chimney is not.
• Ducts and electrical. Sometimes nothing, sometimes the most valuable part of the job.
• Cooling equipment. Whether the coil and outdoor unit are replaced at the same time.
• Permit and inspection with the City of Gainesville or Alachua County, which we handle.

Financing in monthly installments is available on new systems and reviewed with you at the estimate; no lender or rate is published here. The GRU conversion incentive is paid by the utility under its own rules; Cook’s status as a participating contractor for it is still to be confirmed by the owner. [[CONFIRM WITH JERRY]] No federal tax credit applies to furnaces placed in service after 2025.

When we recommend not installing a furnace

We send people away without a furnace when gas is not reasonably available, when the house already has a sound heat pump and the strips are running only because of a thermostat setting, when the owner plans to sell within a few years and will not see the payback, or when the real problem is leaking ducts rather than the heat source. Cook’s would rather fix the actual cause than add an appliance.

Installation day

Old air handler or furnace out; gas line run or connected and pressure tested; furnace set, leveled and vented; condensate drain with trap and, where needed, a pump; cooling coil mounted; electrical and thermostat connected; gas pressure set at the manifold; combustion checked with an analyzer; temperature rise verified against the nameplate; carbon monoxide confirmed at zero in the living space; walkthrough with you. Most straight replacements finish in a day; conversions take longer and are scheduled around the utility.