Fort Bend Why doesn't my house have a gas line?
Across a lot of west and south Fort Bend County — parts of Fulshear, Needville, and the newer sections of unincorporated county — there simply is no natural gas main running down the street. When a builder puts a "gas" furnace and a "gas" range in a house out here, what's actually feeding them is propane, delivered by truck and stored in a tank on the property. That's a fundamentally different arrangement than a metered, regulated gas utility. Propane is bought at whatever the delivery price happens to be that week, and if the tank runs dry on a Saturday during a cold snap, you're waiting on a delivery truck, not turning a valve back on.
None of that makes propane a bad fuel. It makes it a fuel with logistics attached, and logistics are exactly the kind of thing worth weighing against the alternative before you replace a failed system with the same setup it's replacing.
What does a heat pump actually solve here?
A heat pump doesn't burn anything. There's no flue to keep clear, no propane tank to schedule refills around, no heat exchanger that can develop a crack over the years. It moves heat instead of making it, running in reverse of how your air conditioner runs all summer — which, conveniently, is a mode this climate barely asks it to use.
Look at the numbers for Houston Hobby in 2025: about 961 heating degree days against 4,099 cooling degree days. That's roughly four units of cooling demand for every one unit of heating demand. A heat pump sized correctly for this house is going to spend the overwhelming majority of its life doing exactly what a straight air conditioner would do, and only lean on its heating mode for a relatively small number of days a year — mostly mild ones, not deep freezes.
What are the honest downsides?
This is the part that gets skipped in a lot of sales pitches, and it's the part that actually determines whether you're happy with the system in February.
- Supply air feels cool, not hot. A gas or propane furnace pushes air around 120–140°F. A heat pump in heating mode typically supplies air in the 90–100°F range. That's still warmer than the room, and it is heating the house — but if you put your hand over a vent expecting furnace heat, it will feel underwhelming. That's normal operation, not a malfunction.
- Run times are long. Because the supply air isn't blasting hot, the system runs longer and steadier to hold a set temperature rather than firing hot and shutting off. Long run times are the system working correctly, not straining.
- The aux heat strip is a backup, not a setting. Most heat pump systems here include an electric resistance strip for the rare hard freeze. It's meant to supplement briefly during genuinely cold mornings, not to run routinely — if it's kicking on constantly, something upstream needs a look, not a thermostat adjustment.
How do I actually decide?
The right call depends on the specific property, not on a rule of thumb. A few questions worth working through before you commit either way:
- Is there a propane tank and delivery contract already in place, or would a furnace replacement mean setting that up from scratch?
- Has propane delivery ever actually been a problem for this address — a missed delivery, a dry tank, a price spike you didn't see coming?
- Is the ductwork and electrical panel already set up for a heat pump's blower and any strip heat, or does that add cost to the switch?
- What does a room-by-room load calculation say about the sensible and latent heating and cooling demand for this specific house — not a generic model, the actual address?
That last point matters more than people expect. A correctly sized heat pump, checked against a proper load calculation, runs long and steady and keeps humidity in check. An oversized one short-cycles and does neither job well. It's worth asking any installer for a copy of that calculation alongside the quote, the same way you'd ask for it on any new system — see our system sizing and load calculations page for what that document should actually include.
If you're comparing a straight propane furnace replacement against a heat pump, it helps to look at both side by side rather than defaulting to whatever the house already has — our heat pump systems page and our furnace replacement page cover what each involves for a Fort Bend County home specifically.
The takeaway: in a climate that asks for four times more cooling than heating, a heat pump trades a propane tank and its refill logistics for warm-not-hot air and longer run times — a fair trade for most Fort Bend County homes, but one worth checking against your own numbers first.