80% Metal Vented

Keep comfort simple and affordable with our selection of 80% AFUE, metal vent, single-stage gas furnaces. Ideal for replacements where a B-vent flue already exists, and ready for rapid install.

80% AFUE Natural or LP Gas Furnaces Including Single Stage, Two Stage & Variable Speed

NOTE: THE LAST NUMERIC DIGIT ON THE PART NUMBER IS THE COOLING TONS CAPACITY

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80% Metal Vented

These non-condensing, 80% AFUE gas furnace are purpose-built for homes and light commercial spaces that use a metal B-vent flue. They deliver reliable single-stage heat at a budget-friendly price point, making them a smart replacement choice when your existing venting and gas service remain in place. With many models in stock and priced roughly $940-$1,703, you can match capacity and cabinet size to your install and get back to comfort fast.

Choose from 40,000 to 120,000 BTU inputs to fit small homes, larger residences, multi-tenant properties, or light commercial suites. Configurations include Upflow/Horizontal, Downflow/Horizontal, and true Multi-Position models for flexible placement in closets, attics, basements, or utility rooms. Cabinet widths commonly include 14", 14.5", 17.5", 21", and 24.5" to help line up with existing return drops and coils. SEER2 Ratings do not apply to gas-only furnaces; if pairing with central air, the outdoor unit and coil determine SEER2 performance.

Whether you’re a homeowner, DIY-capable buyer coordinating a licensed install, a contractor, or a property manager, these furnaces offer straightforward controls, broad thermostat compatibility, and proven B-vent operation. Single-stage heating keeps operation simple, while multi-position options ease change-outs. Professional installation is required to meet code for gas, venting, and safety clearances.

Top Brands for 80% Metal Vented

Shop trusted names including Goodman, Rheem, and EcoTemp. Our heavy inventory means fast availability across popular BTU sizes, cabinet widths, and installation orientations.

Frequently Asked Questions

  • What size (BTU) 80% AFUE furnace do I need for my home?

    Capacity depends on a Manual J load calculation. As a rough guide, many homes fall between 30-50 BTU per sq. ft. based on climate and insulation. Always size by a professional calculation.

  • Can these 80% gas furnaces use existing metal vent (B-vent) flues?

    Yes. These non-condensing models are designed for Type B metal vent. The vent must be properly sized, pitched, terminated, and in good condition per code and the installation manual.

  • What is the difference between upflow/horizontal and multi-position models?

    Upflow/Horizontal units mount in upflow or horizontal only. Multi-position models add downflow capability, giving more flexibility for closets, basements, and attic installs.

  • Are these single-stage furnaces compatible with my existing thermostat?

    Most work with standard 1H/1C thermostats, including many basic heat-only models. A C-wire may be required for some smart thermostats; check the control board specifications.

  • What cabinet width options are available for replacing older furnaces?

    Common widths include 14", 14.5", 17.5", 21", and 24.5". Matching width helps align with existing ductwork and evaporator coils.

  • Do these furnaces require professional installation or permits?

    Yes. Gas piping, venting, electrical, and safety clearances must meet local code, and permits/inspections are typically required. Professional installation is also needed for warranty compliance.

  • Is an 80% AFUE furnace allowed by code in my area?

    Many regions allow 80% AFUE for replacements; some jurisdictions restrict them in new construction or certain climates. Verify local codes and utility requirements before purchasing.

  • What gas connection and venting requirements apply to these models?

    They use natural gas (LP conversion often available). Follow required gas pressure, shutoff, sediment trap, Type B vent sizing, clearances, and combustion air provisions per code.

  • Does SEER2 apply to these furnaces?

    SEER2 rates cooling efficiency and does not apply to gas-only furnaces. If adding AC, the matched condenser and coil determine the system’s SEER2 rating.

  • Can these units serve light commercial spaces?

    Yes, when properly sized and installed. The 60k-120k BTU range and multi-position options suit small offices, shops, and suites that use B-vent flues.

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