Goodman 3.5 Ton 14 SEER 80% 80,000 BTU Furnace & AC System - R410A Upflow Review 2026

// Bottom Line

This Goodman unit delivers solid entry-level performance at an aggressive $647 price point, making it ideal for budget-conscious homeowners replacing aging equipment or contractors tackling rental properties. It won't turn heads on efficiency ratings, but the two-stage furnace and scroll compressor provide reliable operation for moderate climates.

Review

The Goodman 3.5-ton furnace and AC system represents an aggressive value play in the mid-capacity market. At $647, it undercuts most competitors while delivering recognized brand reliability. This upflow configuration suits basement and closet installations in homes without extreme climate demands. The combination of 42,000 BTU heating capacity and matching 42,000 BTU cooling output handles typical single-family residences in temperate regions effectively.

Performance specs reveal a workmanlike approach rather than premium engineering. The furnace achieves 80% AFUE efficiency with two-stage burners and multi-speed blower control, maintaining reasonable comfort without excessive fuel waste. Cooling delivers 14 SEER performance through a scroll compressor and single-stage operation, producing 73 dB noise levels. The scroll compressor design brings proven longevity, while R410A refrigerant compatibility aligns with current EPA standards. Energy Star certification confirms baseline efficiency standards are met.

Pros & Cons

Pros

Exceptional price at $647 for a complete 3.5-ton system with furnace and AC components
Two-stage burner in the furnace allows better part-load efficiency during milder weather
14 SEER rating qualifies as Energy Star certified, reducing operational costs versus older single-stage units
Multi-speed blower motor adapts to varying heating and cooling demands for improved comfort
Compact footprint at 30 x 21 x 21 inches fits tight mechanical spaces with 10-year warranty protection

Cons

80% AFUE is below modern standards, meaning 20% of heating energy is lost up the chimney
Single-stage condenser delivers less precise cooling modulation than two-stage alternatives
Requires metal exhaust flue and specific electrical configuration that may demand upgrades

Who Should Buy

Best For

Contractors managing rental property portfolios and homeowners in moderate climates seeking straightforward equipment replacement without premium efficiency concerns. This unit works well in regions without extreme heating seasons.

Consider Alternatives If

Buyers in cold northern climates should pursue 90+ AFUE furnaces, and anyone prioritizing cutting-edge cooling efficiency should explore 16+ SEER options.

Goodman 3.5 Ton 14 SEER 80% 80,000 BTU Furnace & A

$647

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Installation

Installation requires metal exhaust flue connections and electrical service between 22.4 and 35 amps at 208/230V single-phase. The compact 21 x 21-inch footprint eases placement in tight spaces. Refrigerant line sizing uses 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation, following standard sweat valve connections. Most skilled technicians complete installation in 4-6 hours without complications.

Warranty & Reliability

Online Supply backs this unit with 10-year coverage upon registration, providing solid protection against manufacturing defects. This warranty is respectable but standard for budget-tier equipment. Coverage likely applies to compressor, furnace components, and coil defects. Registration requirement is typical and ensures you maintain proof of purchase documentation.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
Heating BTU	42,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	48.000000
Feature	Spec
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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Product Features	Rebate Available
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	35 amps
Min. Breaker Size	22.4 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Liquid Line	3/8"
Suction Line	1 1/8"
Style	A-Coil
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

How does 80% AFUE compare to modern furnaces? +

80% AFUE means 20% of heating energy escapes as exhaust waste. Mid-tier furnaces achieve 90-95% AFUE, while high-efficiency models reach 98%. Your heating costs run approximately 10-15% higher than 95% AFUE units over 15 years, offsetting the $647 purchase price advantage.

What electrical upgrades might I need? +

Your home requires 208/230V single-phase service with a dedicated 22.4-35 amp breaker. Many homes have existing 200-amp service panels accommodating this. Budget $150-400 for an electrician to verify compatibility and add a breaker if needed before installation.

Is 14 SEER adequate for cooling performance? +

14 SEER meets Energy Star standards and reduces cooling costs versus 10-12 SEER units. However, 16+ SEER systems provide measurable additional savings in hot climates. For moderate climates with under 500 annual cooling hours, 14 SEER performance differences become negligible.

How does this compare to higher-priced 16+ SEER systems? +

Higher SEER units cost $800-1,200 but deliver 10-15% better cooling efficiency. Over 15 years in temperate climates, efficiency gains recover only $400-600 in energy savings. This unit makes sense if upfront budget matters more than long-term efficiency optimization.

What does the 10-year warranty actually cover? +

Standard coverage includes manufacturing defects in compressor, furnace components, and coil failures. It typically excludes labor, refrigerant, and damage from improper installation or maintenance. Registration is required within 30-90 days of purchase to activate coverage.

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