Independent Review · Updated June 2026

2 Ton 18 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal

Budget-friendly 18 SEER combo system with solid efficiency and two-stage reliability

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
2 Ton 18 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal
Current Price
$2053
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system makes sense for homeowners in moderate climates replacing older equipment on a tight budget. The 18 SEER rating and 80% AFUE deliver respectable efficiency gains without premium pricing, though it won't compete with high-efficiency units above 95% AFUE.

Review

The Goodman 2-ton horizontal system at $2053 represents solid middle-ground equipment for cost-conscious homeowners and small rental properties. This combination unit bundles a 23,000 BTU air conditioner with an 80,000 BTU furnace in a compact horizontal package measuring 21 inches by 21.125 inches by 26 inches. The SKU LS38343850 carries an AHRI certificate (204633302), confirming proper sizing and performance validation. Goodman's position as a high-volume manufacturer means parts availability and technician familiarity across most service areas.

Efficiency numbers tell the practical story here. The 18 SEER cooling rating uses modern test standards and qualifies for Energy Star labeling, translating to roughly 30-35% lower cooling costs than 13 SEER equipment from the early 2000s. The 80% AFUE furnace rating means 20 cents of every heating dollar escapes through the exhaust, a legitimate drawback compared to 95% AFUE condensing models. Two-stage operation on both the compressor and condenser reduces unnecessary cycling during partial-load conditions. The variable-speed blower motor at 2000 CFM maximum adjusts to actual demand, improving both comfort and efficiency compared to fixed-speed alternatives.

Pros & Cons

Pros

  • 18 SEER cooling efficiency qualifies for Energy Star certification and most rebate programs
  • Two-stage compressor and condenser reduce runtime and energy waste during mild weather
  • Variable-speed blower motor adjusts to actual heating and cooling needs, improving comfort
  • Horizontal configuration fits tight attic or crawlspace installations where upflow models won't work
  • 80,000 BTU heating output with two-stage burner handles cold climates without oversizing
  • 10-year warranty with registration provides solid peace-of-mind coverage for parts

Cons

  • 80% AFUE rating trails modern condensing furnaces at 95%+ efficiency, costing more to heat over time
  • Metal exhaust flue requirement adds installation complexity and cost compared to PVC-vented systems
  • R410A or R22 refrigerant options create compatibility questions, requires clarification before purchase
  • 71 dB noise level is moderately loud during compressor operation in cooling mode

Who Should Buy

Best For

Homeowners in mild to moderate climates upgrading from 10-15 year old systems and prioritizing upfront cost savings over long-term utility bills. This works especially well when retrofitting horizontal units into tight attic spaces where traditional upflow units don't fit.

Consider Alternatives If

Buyers in extremely cold climates needing maximum heating efficiency or those willing to invest more upfront for 95%+ AFUE furnaces that recover operating costs within 5-7 years should explore condensing alternatives.

2 Ton 18 SEER 80% AFUE 80,000 BTU Goodman Gas Furn
$2053
Buy at HVACDirect →

Installation

This horizontal configuration requires careful mounting in attic or crawlspace settings with adequate clearance and support. The metal exhaust flue must vent to outside, typically running 50 feet per the included line specification. Electrical requirements demand 208/230V single-phase 60 Hz service with breaker sizing between 15.3 and 25 amps. Refrigerant line connections use 3/8-inch liquid and 3/4-inch suction lines with 3/4-inch insulation thickness. Professional installation is strongly recommended given refrigerant handling and gas line safety concerns.

Warranty & Reliability

The 10-year parts warranty requires online registration and covers manufacturing defects on the sealed system and heat exchanger. This extended coverage compares favorably to standard 5-year warranties, though it doesn't include labor or refrigerant. Real-world protection depends heavily on proper installation and annual maintenance. Goodman's service network is extensive, making warranty claims straightforward in most regions.

Specifications

SKULS38343850
Brand/ManufacturerOnline Supply
Cooling BTU23,000
Heating BTU80,000
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)22.000000
FeatureSpec
Safety InformationPROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
AHRI Certificate Number204633302
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorVariable Speed
Maximum CFM2000
ConfigurationHorizontal
Burner StagesTwo
Fuel TypePropane, Natural Gas
Height21"
Width21.125"
Depth26"
ResourcesCHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Product FeaturesTwo Stage Condenser
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size3/4"
Max Breaker Size25 amps
Min. Breaker Size15.3 amps
Tonnage3.5 Ton
Valve TypeSweat
Liquid Line3/8"
Suction Line3/4"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

What's the actual difference between 18 SEER and 13 SEER air conditioners? +
18 SEER units cool more efficiently, using roughly 27% less electricity than 13 SEER models. Over 15 years in a moderate climate, the efficiency advantage typically recovers $200-400 in energy savings, though this varies by local electricity rates and cooling demand.
Can this horizontal unit replace my old upflow furnace? +
Only if you have adequate horizontal space in an attic or crawlspace. The 26-inch depth and 21-inch height require careful planning. Most installers charge extra for conversion ductwork and support modifications when switching orientations.
Why does Goodman list both R410A and R22 as refrigerant options? +
R22 is the older, phased-out refrigerant banned in new equipment production but still used in retrofits. Confirm with your installer which refrigerant your unit ships with, as they're not interchangeable and have different pressure requirements.
How does this system compare to Carrier or Lennox units at similar price points? +
Goodman prioritizes manufacturing efficiency over brand prestige, resulting in lower pricing. Carrier and Lennox offer similar SEER ratings at higher costs, primarily due to branding. Performance and reliability are comparable across all three manufacturers at equivalent efficiency tiers.
Is the 10-year warranty worth the online registration hassle? +
Yes, the extended coverage justifies the five-minute registration process. It protects against compressor failure and heat exchanger cracks, the two most expensive repairs typically costing $1200-2500 each.

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