1.5 Ton 14.5 SEER 96% AFUE 40,000 Goodman Gas Furnace and Heat Pump System - Downflow Review 2026

// Bottom Line

This Goodman hybrid system works best for homeowners in moderate climates who want efficient cooling without sacrificing winter heating power. The 96% AFUE furnace and 14.5 SEER heat pump provide year-round efficiency, especially valuable if you experience extended heating seasons.

Review

Goodman's 1.5 ton hybrid system pairs a heat pump condenser with a 40,000 BTU gas furnace for dual-season performance. This downflow configuration is designed for homes where traditional side-discharge units don't fit, such as those with basement mechanical rooms or attic-mounted equipment. The Energy Star certification reflects solid engineering at a competitive price point that appeals to cost-conscious contractors and homeowners managing equipment replacement budgets.

The cooling side delivers 18,000 BTU with 14.5 SEER efficiency through a single-stage rotary compressor, while the furnace handles heating with two-stage burner technology and 96% AFUE. The variable-speed ECM blower motor cycles between 0 and 1,200 CFM depending on demand, reducing runtime waste. Refrigerant flows through 3/8 inch liquid and 3/4 inch suction lines with factory insulation. This combination proves particularly effective in shoulder seasons when the heat pump carries full load without furnace assistance.

Pros & Cons

Pros

96% AFUE furnace efficiency means excellent winter performance and lower natural gas bills
14.5 SEER cooling efficiency qualifies for Energy Star and regional rebates
Variable speed ECM blower motor optimizes airflow and reduces energy waste throughout the year
Two-stage burner provides modulating heat for comfort and efficiency in mild weather
Downflow A-coil configuration works in attics and tight spaces where upflow units won't fit

Cons

Single-stage compressor limits efficiency gains during partial-load cooling conditions
70 dB noise level is moderately loud, worth considering if outdoor unit is near windows
Sweat valve connections require proper brazing skills, adding to installation complexity and cost

Who Should Buy

Best For

Homeowners in mixed climates (North Carolina, Ohio, Pennsylvania region) who need reliable winter heating alongside efficient cooling. This system is ideal if you're replacing an older furnace and want hybrid efficiency without overbuilding for mild climates.

Consider Alternatives If

Anyone in consistently hot regions like Florida or Arizona should consider a true air conditioning system without furnace integration, or look for variable-capacity heat pumps if efficiency is the priority.

1.5 Ton 14.5 SEER 96% AFUE 40,000 Goodman Gas Furn

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Installation

Installation requires sweat connections on both liquid and suction lines, meaning technician brazing skills are essential. The unit runs on standard 115V single-phase power with 11.8 to 20 amp breaker sizing. Downflow discharge requires PVC or plastic exhaust flue. Ductwork must accommodate 1,200 CFM maximum airflow. Professional installation is strongly recommended given the refrigerant handling and electrical work involved.

Warranty & Reliability

Goodman provides 10 years of coverage with online registration, which is competitive for the price tier. This covers compressor, coils, and electrical components. Registration extends benefits beyond basic warranty, and Goodman's parts network supports easy replacement access. Homeowner diligence with annual maintenance and filter changes will protect this warranty investment.

Specifications

SKU	LS38343850
Brand/Manufacturer	Online Supply
Cooling BTU	18000
Heating BTU	40,000
Refrigerant	R410A
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	70
Weight (in lbs)	22.000000
Feature	Spec
Replaces	GSZ140191
Energy Star	Yes
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Rotary
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	20 amps
Min. Breaker Size	11.8 amps
Tonnage	3 Ton
Valve Type	Sweat
Height	34.5"
Width	17.5"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	PROPOSITION 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.
Configuration	Downflow/Horizontal
Liquid Line	3/8"
Suction Line	3/4"
Style	A-Coil
AHRI Certificate Number	7368837
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1200
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What's the actual tonnage difference between the cooling and heating specs? +

The cooling capacity is 18,000 BTU or 1.5 tons, but the furnace generates 40,000 BTU heating. This isn't a tonnage mismatch, it's intentional design. The heat pump handles mild winter days while the furnace engages during cold snaps. Goodman rates the system as 1.5 ton cooling and 40k heating rather than total tonnage.

Can this unit handle my existing ductwork from a 3-ton system? +

Your existing ductwork may be oversized. With 1,200 CFM maximum, this unit is designed for smaller homes or tight duct runs. If your system previously needed 1,500 plus CFM, you'll experience reduced air distribution. Have a technician evaluate your return and supply duct sizing before installation.

Is 14.5 SEER good enough, or should I wait for 16+ SEER models? +

14.5 SEER is solid but not cutting-edge. Higher SEER models use variable-capacity compressors and cost significantly more. For moderate climates with short cooling seasons, the 96% furnace efficiency provides better ROI than spending extra for maximum cooling efficiency. Calculate payback based on your specific utility costs and climate data.

How does the two-stage burner improve heating efficiency versus single-stage? +

Two-stage burners run at lower capacity during mild weather, reducing short-cycling and heat loss up the flue. Combined with the 96% AFUE, you see fewer on-off cycles and steadier temperature control. This matters most in spring and fall when outdoor temps hover around 40-60 degrees Fahrenheit.

What does the 10-year warranty actually cover if something fails? +

It covers the compressor, evaporator coil, condenser coil, and sealed refrigerant system against defects. The furnace heat exchanger is typically included. Labor and refrigerant recharges are usually not covered. Read your registration documents carefully for specific exclusions and claim procedures.

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