Furnace shopping is where homeowners get talked into the most expensive mistake in HVAC, and almost nobody warns them. So before the rankings, here is the number that should shape your decision.
The 0.5% that costs $3,000
The premium furnace brands top out around 98.5 to 99% AFUE. The value brands reach about 98%. That gap is half a percentage point.
On a typical $1,800 annual gas bill, half a percent works out to roughly $9 a year. The premium unit costs $2,400 to $3,300 more.
Now apply that to Sacramento. Our heating season runs maybe three months, in bursts, and most homes here spend far less than $1,800 a year on gas heat. So the payback on ultra-high AFUE is even worse locally than that national math suggests. If someone is pushing you toward a 99% AFUE furnace for the energy savings, ask them to show you the arithmetic.
That does not make premium furnaces pointless. It means you should buy them for the reasons that actually hold up: build quality, warranty, quieter variable-speed operation, and a dealer network that can service them. Not for the efficiency label.
Best furnace brands in 2026
| Brand | Tier | Top AFUE | Heat exchanger warranty | Best for |
|---|---|---|---|---|
| Lennox | Premium | 99% (SLP99V) | Limited lifetime | Highest efficiency on the market |
| Carrier | Premium | 98.5% (Infinity 98) | Limited lifetime | Comfort features, deep dealer network |
| Trane | Premium | 97.3% (XC95m) | Limited lifetime | Durability and the strongest overall warranty |
| Amana | Value+ | ~98% | Lifetime unit replacement | Best warranty in the industry, full stop |
| Goodman | Value | ~98% | Lifetime heat exchanger | Best value: 98% AFUE for thousands less |
| Rheem | Mid | ~97% | Lifetime heat exchanger | Sensible middle, no weak point |
The warranty nobody talks about: Amana
Amana carries what is genuinely the strongest warranty in residential HVAC: a lifetime unit replacement warranty on the heat exchanger. Not a repair, not a prorated credit. If the heat exchanger fails, they replace the unit.
That matters because the heat exchanger is the one furnace part that ends the conversation. A crack is a carbon monoxide risk, not a comfort problem, and on most brands it means buying a new furnace. Amana is also a Daikin brand, the same family as Goodman, so you are getting value-tier pricing with premium-tier coverage.
Goodman and Rheem both offer lifetime heat exchanger coverage too, which is why the value tier is far more competitive on furnaces than it is on air conditioners.
Why furnaces are different from air conditioners here
This is the part that surprises people. On the cooling side, our climate rewards spending more: the AC runs five months a year, so efficiency and durability pay back. On the heating side, the opposite is true. Short season, intermittent use, low annual gas spend.
Practical consequence: if your budget is fixed and you are replacing both, put the money into the air conditioner and buy a solid mid-tier furnace. That allocation will make your house more comfortable and cost less over ten years than splitting it evenly.
What actually matters when choosing
- Single-stage, two-stage or modulating. Single-stage is full blast or off. Two-stage runs low most of the time and is noticeably more comfortable. Modulating adjusts continuously and is the quietest. In our mild winters, two-stage is the sensible stopping point for most homes.
- Sizing. Oversized furnaces short-cycle, which wears them out and leaves the house unevenly heated. A load calculation matters more than the brand.
- Venting. A 90%+ efficiency furnace vents through PVC out a sidewall, not up the old chimney. In older homes that reroute is a real cost, and it is where quotes diverge.
- Gas or electric or heat pump. Worth pricing all three here. See our heat pump page, because our mild winters make that comparison closer than most people expect.
Our honest picks
Best overall value: Goodman or Amana. Roughly 98% AFUE with a lifetime heat exchanger warranty, thousands less than premium. Amana takes it if you want the unit replacement coverage. More in our Goodman review.
Best if you want premium: Trane, for the warranty and reliability record rather than the AFUE number. See the Trane review.
Best efficiency, if you genuinely want it: Lennox at 99% AFUE, with the parts-availability caveat we cover in the Lennox review.
Sensible middle: Rheem. Details in the Rheem review.
For the cooling side of the same decision, see our guide to the best central air conditioner brands and the brand comparison. For real installed pricing, see new HVAC system cost.
Getting it installed right
Whichever brand you pick, the install decides the outcome. We do a load calculation on the actual house, handle the permit and Title 24 commissioning, and register the warranty the same day so you do not lose coverage to a missed deadline. That is how our furnace installation and heating service works across Sacramento and Roseville. If your furnace is acting up, the diagnostic is a flat $69 and it goes toward the repair.
Frequently asked questions
What is the best furnace brand in 2026?
It depends on your priority. Lennox leads on efficiency at 99% AFUE, Trane on durability and warranty, and Amana has the best warranty in the industry with lifetime unit replacement on the heat exchanger. Goodman offers roughly 98% AFUE for thousands less, which makes it the best value for most homes.
Is a 98% AFUE furnace worth it over a 96%?
Usually not in the Sacramento area. The efficiency gap between premium and value furnaces is often around half a percentage point, worth roughly $9 a year on a typical gas bill, while the premium unit costs $2,400 to $3,300 more. Our short heating season makes the payback even slower.
Which furnace brand has the best warranty?
Amana, with a lifetime unit replacement warranty on the heat exchanger, meaning they replace the unit rather than the part. Goodman and Rheem both offer lifetime heat exchanger coverage, and the premium brands typically offer limited lifetime heat exchanger warranties with 10-year parts.
How much more do premium furnace brands cost?
Typically 30 to 50% more than value brands like Goodman and Rheem. You are paying for build quality, quieter variable-speed operation, comfort features and dealer network rather than a meaningful efficiency gain.
Should I spend more on the furnace or the air conditioner?
In this climate, the air conditioner. It runs five months a year while the furnace runs in short bursts for about three. If your budget is fixed and you are replacing both, put the money into cooling and choose a solid mid-tier furnace.