Independent Review · Updated June 2026

3 Ton 18 SEER Goodman Air Conditioner Split System - Upflow/Downflow

Budget-friendly 18 SEER Goodman coil hits efficiency targets without breaking the bank

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 18 SEER Goodman Air Conditioner Split System - Upflow/Downflow
Current Price
$736
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman A-coil is ideal for contractors and homeowners replacing existing systems who need solid efficiency at a competitive price point. The 18 SEER rating, variable-speed ECM blower, and two-stage compressor deliver real comfort without premium pricing, making it a smart choice for budget-conscious upgrades in moderate climates.

Review

The Goodman 3-ton A-coil air conditioner hits a sweet spot in the mid-market HVAC landscape. At $736, this split system delivers respectable cooling capacity without premium pricing that typically accompanies higher-tier brands. Designed for both upflow and downflow installations, the DSXC180361 appeals to contractors managing multiple job types and homeowners looking for straightforward replacement coils. Its 18 SEER efficiency rating qualifies for Energy Star recognition, signaling solid performance expectations.

Real-world performance is backed by solid specs: 35,000 BTU cooling capacity, two-stage scroll compressor, and 1,600 CFM maximum airflow from a variable-speed ECM motor. The ECM blower is the standout feature here, automatically adjusting speeds to match load conditions, reducing energy waste during low-demand periods. At 71 dB noise output, this unit operates noticeably quieter than single-stage competitors. The 208/230V single-phase electrical requirement keeps installation straightforward on standard residential circuits within the 35-amp breaker capacity.

Pros & Cons

Pros

  • 18 SEER energy rating qualifies as Energy Star, reducing long-term operating costs meaningfully
  • Variable-speed ECM blower motor adjusts airflow from near-silent to full 1,600 CFM capacity
  • Two-stage compressor and scroll design provide quieter operation at 71 dB, comparable to conversation volume
  • 35,000 BTU cooling capacity handles 3-ton loads efficiently across upflow and downflow installations
  • 10-year warranty with online registration provides reasonable protection for the price tier

Cons

  • 18 SEER is good but not exceptional; newer high-efficiency models reach 22+ SEER ratings
  • Limited electric backup heat options require separate assessment during heating-dominant climates
  • No mention of noise reduction features beyond decibel rating, limiting appeal in noise-sensitive applications

Who Should Buy

Best For

Contractors installing replacement systems for budget-conscious homeowners in moderate climates, and DIY-minded owners who prioritize value and solid performance over premium efficiency tiers. This unit excels in regions where cooling loads are moderate and energy rebates don't require SEER ratings above 18.

Consider Alternatives If

Buyers in extremely hot climates needing maximum cooling efficiency, those seeking premium warranty coverage, or homeowners requiring integrated heating without external backup heat staging.

3 Ton 18 SEER Goodman Air Conditioner Split System
$736
Buy at HVACDirect →

Installation

Installation is contractor-friendly with standard sweat-valve connections for 3/8 inch liquid and 7/8 inch suction lines. The A-coil configuration measures 38.25 inches tall and 35.5 inches on both sides, fitting most existing furnace cabinets without major modifications. Electrical installation is straightforward for single-phase 60 Hz systems. The variable-speed blower requires compatible furnace wiring but no proprietary controls.

Warranty & Reliability

Goodman provides 10 years of parts coverage when registered online, a solid middle-ground warranty for this price segment. Registration is simple and extends protection at no additional cost. Coverage limits apply to manufacturing defects, not wear items or improper installation. This warranty positioning reflects the value-oriented market segment.

Specifications

SKUDSXC180361
Brand/ManufacturerGoodman
Cooling BTU35,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)228.000000
FeatureSpec
Blower MotorVariable Speed - ECM
Maximum CFM1,600
Electric Backup Heat Capabilities (Optional)3 Kilowatts, 5 Kilowatts, 6 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts
Max Breaker Size35 amps
Tonnage3 Ton
Height38.25"
Width35.5"
Depth35.5"
ResourcesGoodman Specifications Goodman Installation Manual You will need Adobe® Acrobat® Reader to view PDF documents.
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.
ConfigurationUpflow / Downflow
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Min. Breaker Size21.9 amps
Valve TypeSweat

Frequently Asked Questions

Is 18 SEER sufficient for my climate? +
Yes, in moderate climates with moderate cooling seasons. 18 SEER delivers approximately 18 BTU of cooling per watt consumed. Hot, humid climates benefit from 20+ SEER units, while temperate regions see solid ROI at this tier within 5-7 years of energy savings.
Can I install this in an upflow and downflow configuration interchangeably? +
Yes, the A-coil design works in either orientation, making it versatile for different furnace placements. Your ductwork configuration determines proper orientation. Consult installation manuals for airflow direction requirements specific to your furnace model.
How does the variable-speed ECM blower improve efficiency? +
The ECM motor adjusts speeds based on cooling demand, running slower during light loads and full speed during peak cooling. This eliminates wasted energy from constant-speed motors operating above actual load requirements, improving seasonal efficiency significantly.
How does this compare to higher SEER models from other brands? +
This 18 SEER Goodman costs $200-400 less than equivalent Carrier or Lennox 20+ SEER units. Premium brands offer marginal efficiency gains and better warranties. For budget-conscious buyers, this Goodman delivers 85-90% of their cooling efficiency at 70-75% of the price.
What does the 10-year warranty cover exactly? +
It covers manufacturing defects in parts like the compressor and coil when registered online. Labor, refrigerant, and damage from installation errors are excluded. Extended warranties available separately for additional protection beyond the base coverage.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.