4 Ton 18 SEER Goodman Air Conditioner Split System - Upflow/Downflow Review 2026

// Bottom Line

This Goodman split system suits contractors and homeowners seeking reliable, efficient cooling in moderate to warm climates without premium pricing. The 18 SEER1 rating and variable-speed ECM blower deliver solid energy savings, though tonnage labeling inconsistencies warrant clarification before purchase.

Review

The Goodman 4 Ton 18 SEER split system represents mainstream commercial HVAC equipment positioned between budget and premium market segments. This A-coil, upflow/downflow configuration handles most residential retrofit and new construction projects without specialized ducting requirements. Goodman has built reputation on straightforward engineering and field serviceability, making this unit a contractor staple across North America.

Performance specs show 47,000 BTU cooling capacity with an 18 SEER1 rating, yielding approximately 2,600 BTU per watt of energy input. The variable-speed ECM blower delivers up to 2,000 CFM while modulating runtime based on load, reducing energy waste during shoulder seasons. Two-stage compressor technology enables the unit to operate at partial capacity during mild weather, further improving seasonal efficiency over single-stage competitors.

Pros & Cons

Pros

18 SEER1 efficiency rating qualifies for Energy Star certification and delivers measurable utility bill reductions
Variable-speed ECM blower motor provides superior comfort control and runs quieter than single-speed alternatives
Two-stage compressor reduces cycling losses and improves performance during partial-load conditions
Flexible electric backup heat options from 3 kW to 20 kW accommodate diverse climate needs
10-year warranty with online registration provides solid long-term protection and peace of mind

Cons

Product title states 4 Ton but specs list 5 Ton tonnage, creating confusion during specification and ordering
72 dB noise level is audible and louder than premium variable-capacity competitors in the same efficiency tier
Scroll compressor requires proper refrigerant charging; field errors are common and reduce efficiency gains

Who Should Buy

Best For

Contractors upgrading residential HVAC systems in climate zones requiring reliable cooling without cutting-edge technology. Homeowners in moderate to hot climates who prioritize energy efficiency and want dependable equipment with straightforward maintenance.

Consider Alternatives If

Buyers needing ultra-quiet operation, those in extremely harsh commercial environments, or anyone requiring specialized variable-refrigerant-flow configurations.

4 Ton 18 SEER Goodman Air Conditioner Split System

Buy at HVACDirect →

Installation

This unit requires standard 208/230V single-phase 60Hz power with 29.3 to 50 amp breaker sizing depending on backup heat configuration. Sweat connections use 3/8 inch liquid and 7/8 inch suction lines, calling for competent refrigeration brazing. Weight at 50 lbs demands secure mounting; upflow/downflow orientation flexibility eases installation in confined spaces or utility closets.

Warranty & Reliability

Ten-year parts coverage activates upon online registration, providing comprehensive protection against manufacturer defects. This warranty extends to compressor, coil, and motor components. Registration requirement is simple but non-negotiable, so document the serial number and complete enrollment immediately after installation to avoid coverage gaps.

Specifications

SKU	CAPF4961D6
Brand/Manufacturer	Goodman
Cooling BTU	47,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	72
Weight (in lbs)	50.000000
Feature	Spec
Blower Motor	Variable Speed - ECM
Maximum CFM	2,000
Electric Backup Heat Capabilities (Optional)	3 Kilowatts, 5 Kilowatts, 6 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts, 20 Kilowatts
Max Breaker Size	50 amps
Tonnage	5 Ton
Height	30"
Width	24.5"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® 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.
Energy Star	Yes
SEER1 (Efficiency)	18
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Min. Breaker Size	29.3 amps
Valve Type	Sweat
Configuration	Upflow / Downflow
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

Why does the title say 4 Ton but specifications show 5 Ton? +

This appears to be a product database inconsistency. Verify tonnage with Goodman directly using SKU CAPF4961D6 before ordering. The 47,000 BTU rating suggests nominal 4-ton capacity, but confirm with your supplier to prevent coil mismatch or installation delays.

Can this unit work with both R410A and R22 refrigerants? +

The specs state R410A or R22 compatibility, but verify your coil matches the specified refrigerant. Field conversion between refrigerants is costly and reduces efficiency. Confirm refrigerant type with your equipment supplier at time of purchase to ensure proper compressor oil and component matching.

How much energy will the variable-speed motor actually save? +

Variable-speed ECM motors typically reduce annual energy consumption 10-20% compared to single-speed PSC motors during moderate seasons. Your savings depend on climate, setpoint consistency, and duct design. In consistently hot climates, benefits diminish since the compressor runs near full capacity most operating hours.

How does this compare to Carrier or Lennox equivalents? +

Goodman delivers comparable SEER ratings at lower initial cost but may require slightly more field experience to achieve rated efficiency. Carrier and Lennox units often include premium diagnostics and tighter quality control, justifying 15-25% higher pricing for similar capacity and efficiency ratings.

Is the 10-year warranty worth registering for? +

Yes. Compressor replacement alone costs 800-1,500 dollars. Registration is five minutes online. Without it, coverage defaults to one year, making registration a no-risk decision protecting your significant equipment investment.

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