Furnaces

Gas furnaces from Goodman and Ace Air — the indoor heat source in a gas/electric HVAC setup. Pairs with an evaporator coil and outdoor condenser to complete your system.

Free shipping on complete systems 10-Year registered warranty Ships from Ocala, FL
Availability
Price
—
Brand
BTU
AFUE
Unit Type
20 furnaces

About Gas Furnaces

The indoor heat source in a gas/electric HVAC setup

A gas furnace burns natural gas or propane to heat your home, then circulates that heated air through your ducts via a blower. In a typical gas/electric setup, the furnace handles heating, an evaporator coil mounted on top of the furnace handles cooling, and an outdoor AC condenser completes the cooling side.

Every furnace on this page is factory-sealed, safety-tested, and shipped from our Ocala, FL warehouse — usually out the door within 1-3 business days. We carry Goodman (a Daikin brand) and our own Ace Air private label, with BTU capacities from 60,000 to 120,000 to cover most residential homes.

The three decisions: BTU size (heating capacity for your home), AFUE rating (efficiency tier — 80% is standard, 90%+ is premium condensing), and configuration (upflow/horizontal). All furnaces on this page are multi-configuration installations.

20
Units
In stock, ready to ship
1-3
Business Days
Typical ship time from Ocala
10
Year
Parts warranty, when registered
80%
AFUE
Rated heating efficiency

What to look at when choosing

Three specs that matter for a gas furnace — simpler decision than an AC system

B

BTU (heating capacity)

Gas furnaces are sized by BTU/h output. A 60,000 BTU furnace suits roughly 1,200-1,500 sq ft in a mild climate; 100,000-120,000 BTU covers 2,500+ sq ft or cold-climate homes. Undersizing leaves you cold on the coldest days; oversizing cycles on and off and wastes gas.

A

AFUE (efficiency rating)

Annual Fuel Utilization Efficiency measures how much of the gas burned becomes useful heat vs. what escapes up the flue. 80% AFUE is the standard tier — 80 cents of every dollar goes to heat, 20 cents up the chimney. 90%+ condensing furnaces are more efficient but cost more up-front and require different venting.

C

Upflow / Horizontal configuration

Upflow furnaces sit on a basement or closet floor and blow warm air upward through supply ducts overhead. Horizontal configuration lays the unit on its side for attic or crawl space installations. All furnaces on this page are multi-configuration — they can be installed either orientation.

Frequently asked questions

Common questions about gas furnaces — sizing, efficiency, and what else you need

Do I need a furnace, or should I get a heat pump?

Depends on climate and fuel costs. In cold climates with affordable natural gas, a gas furnace is usually cheaper to run in winter. In mild climates or where electricity is cheap vs. gas, a heat pump wins — and gives you AC from the same outdoor unit. Many homes run a hybrid setup: a heat pump for most of the year, a gas furnace as backup for the coldest stretches. Call us at (352) 438-8992 if you'd like to talk through which is right for you.

How do I size a furnace for my home?

Rough rule: 30-60 BTU per sq ft, depending on climate and insulation. A 1,500 sq ft home in Florida might only need 45,000-60,000 BTU; the same home in Minnesota could need 80,000-100,000 BTU. Real sizing (Manual J load calculation) factors in windows, ceiling height, insulation quality, and air leakage. Bigger is not better — oversized furnaces short-cycle, run less efficiently, and create temperature swings. Call us for a free sizing check.

What else do I need besides the furnace?

A complete gas-heat system is: (1) the gas furnace (this collection), (2) an evaporator coil that sits on top of the furnace for AC cooling, (3) an outdoor AC condenser or heat pump, and (4) compatible ductwork. If you're replacing an existing furnace, you may be able to reuse the coil and condenser — but if they're older than 10-12 years, consider replacing as a full system for efficiency and warranty reasons.

How long does a gas furnace last?

Typical lifespan is 15-20 years with regular maintenance — longer than most HVAC components since there's no outdoor exposure and the burner runs fewer hours than a compressor. Annual maintenance (cleaning the burner, checking the heat exchanger for cracks, replacing the filter) is the single biggest lifespan factor. Cracked heat exchangers are the end-of-life failure mode and a safety concern — have a pro check yearly.

Does Ace Air Direct ship furnaces nationwide?

Yes. We ship furnaces to all 48 contiguous states from our warehouse in Ocala, FL. Complete systems ship free. Most orders leave within 1-3 business days via freight carrier with tracking and a scheduled delivery appointment. Local pickup is available in Ocala for additional savings.