3.5 Ton 13 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This ACiQ combo system works well for homeowners upgrading from aging equipment who want dependable heating and cooling without premium pricing. The 96% AFUE furnace and 13 SEER condenser deliver respectable efficiency gains, plus dual-fuel capability adds flexibility for propane or natural gas installations.

Review

The ACiQ 3.5 ton combo system merges a Goodman 80,000 BTU furnace with an air conditioning condenser into a practical mid-range solution. This downflow configuration fits retrofit installations where vertical space runs tight. Energy Star certification signals baseline efficiency compliance, though it occupies the middle tier rather than premium performance category. At 120 pounds, the condenser unit requires standard pad installation and typical refrigerant line work.

The furnace delivers 96% AFUE efficiency using a two-stage burner, meaning substantially lower heating bills versus 80-85% models from 10 years ago. Its variable-speed ECM blower handles up to 1,600 CFM and adjusts output dynamically for comfort and efficiency. The 5 ton cooling side produces 42,000 BTU at 13 SEER with R410A refrigerant, adequate for most homes but positioned below newer 14-16 SEER offerings. Single-stage compression runs full capacity, lacking the modulation efficiency of two-stage systems.

Pros & Cons

Pros

96% AFUE furnace efficiency reduces heating costs significantly compared to 80% systems
13 SEER condenser with variable-speed ECM blower maximizes cooling efficiency and comfort
Dual-fuel flexibility supports both propane and natural gas, useful for mixed-fuel homes
5 ton cooling capacity (42,000 BTU) handles most residential demand across climate zones
Two-stage burner modulation reduces energy waste and improves temperature consistency

Cons

SEER 13 rating trails modern 14-16 SEER systems, limiting rebate eligibility in some states
Reciprocating compressor generates 75 dB at operation, louder than scroll or rotary alternatives
Single-stage condenser means cooling runs full-capacity only, less efficient in mild weather

Who Should Buy

Best For

Homeowners in moderate climates looking to replace 15+ year old furnace-AC combos who prioritize reliable performance and reasonable cost over cutting-edge efficiency. Works well for mixed-fuel properties or homes where 13 SEER ratings meet local rebate thresholds.

Consider Alternatives If

Buyers in hot climates needing maximum cooling efficiency, those qualifying for high-rebate tiers requiring 14+ SEER, or noise-sensitive installations where 75 dB operation matters.

3.5 Ton 13 SEER 96% AFUE 80,000 BTU Goodman Gas Fu

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Installation

Installation requires standard 115V single-phase 60Hz service with 23.9 to 40 amp breaker sizing. Liquid and suction lines use 3/8 inch and 7/8 inch connections respectively with sweat valve fittings, standard for residential work. Downflow/horizontal configuration demands adequate ductwork routing. Plastic PVC exhaust flue is required. Most qualified HVAC contractors complete installation in 4-6 hours.

Warranty & Reliability

ACiQ provides 10-year comprehensive parts coverage with online registration, protecting major components like compressor and heat exchanger. This matches industry standard for mid-tier residential equipment. Registration is mandatory for full term coverage. Labor and refrigerant charges typically fall outside warranty scope, so clarify terms with your installer.

Specifications

SKU	ACIQ-4X-EHPD-UPG
Brand/Manufacturer	ACiQ
Cooling BTU	42,000
Heating BTU	80,000
Refrigerant	R410A
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	120.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	7/8"
Liquid Valve Size	3/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	5 Ton
Valve Type	Sweat
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.
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.
AHRI Certificate Number	7368843
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1600
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 96% AFUE compare to my current furnace? +

If your furnace is 15+ years old, it likely runs 78-82% AFUE. Upgrading to 96% AFUE translates to roughly 15-18% lower heating costs annually. A 2000 square foot home in a cold climate typically saves 300-500 dollars per heating season versus older units.

Can this system handle a propane conversion later? +

Yes, this system supports both natural gas and propane fuel types. If your home currently uses natural gas but you need propane flexibility, the furnace accommodates the switch. Your installer must adjust gas valve settings and orifice sizing during conversion.

Why is 13 SEER considered mid-range now? +

New SEER2 ratings replaced SEER1 in 2023, making direct comparisons tricky. However, 13 SEER units underperform versus modern 14-16 SEER options by roughly 7-20% cooling efficiency. If energy rebates matter in your area, verify that 13 SEER qualifies before purchasing.

Is this compatible with my existing ductwork from a 3.5 ton system? +

Mostly yes, but ductwork sizing depends on your blower CFM. This unit handles 1,600 CFM maximum. If your existing ducts were undersized for the old system, your contractor should evaluate airflow and recommend balancing adjustments or minor duct modifications.

What happens if something breaks after year 3? +

The 10-year warranty covers parts replacement if registered online. Labor and refrigerant are typically not included. Breakdown costs depend on the failed component, but compressor replacement runs 800-1,500 dollars out of pocket if unregistered.

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