3 Ton 16 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system delivers genuine value for contractors and homeowners needing a complete heating and cooling solution without premium pricing. At $736, you're getting legitimate 16 SEER efficiency and two-stage operation that handles residential comfort needs reliably, though it won't match high-end systems.

Review

The Goodman CAPF3743C6 represents straightforward engineering in the competitive 3-ton combo market. This upflow configuration pairs a 100,000 BTU furnace with a matching air conditioner in one package, eliminating component matching guesswork. Goodman positions itself as the practical choice for builders and contractors who value reliability over innovation, and this system delivers exactly that positioning without gimmicks or unnecessary complexity.

Performance specs tell the real story. The 16 SEER cooling rating and 80% AFUE heating efficiency sit squarely in the efficient-but-standard range. You get 36,000 BTU cooling output with two-stage scroll compressor operation, meaning the system modulates capacity based on demand rather than cycling on and off constantly. The variable-speed blower motor reaches 2000 CFM maximum and works across the 100,000 BTU heating BTU range, providing balanced airflow in both seasons.

Pros & Cons

Pros

16 SEER rating delivers strong cooling efficiency for the price point, Energy Star certified
Two-stage compressor and burners enable better part-load performance and comfort cycling
100,000 BTU furnace handles most residential heating needs with 80% AFUE efficiency
36,000 BTU cooling capacity matches 3-ton tonnage accurately for proper system sizing
Variable speed blower motor with 2000 CFM maximum optimizes airflow across seasons
Two-valve sweat connection design simplifies field installation for experienced technicians

Cons

80% AFUE is minimum standard, not competitive with 95%+ high-efficiency models
70.4 dBA noise level is audible during operation, noticeable in quiet homes
10-year warranty requires online registration, standard coverage only

Who Should Buy

Best For

Budget-conscious homeowners replacing aging systems and contractors building starter packages for residential properties in moderate climates. This system makes sense if you need reliable comfort without paying for premium efficiency upgrades you won't recoup in 10 years.

Consider Alternatives If

Anyone in extremely cold climates needing 95%+ AFUE efficiency, or homeowners prioritizing whisper-quiet operation should look at higher-end systems.

3 Ton 16 SEER 80% AFUE 100,000 BTU Goodman Gas Fu

$736

Buy at HVACDirect →

Installation

Installation follows standard split-system protocols. The condenser unit measures 30 by 21 by 21 inches and weighs 63 pounds, allowing single-technician placement. Sweat valve connections use 3/8-inch liquid lines and 3/4-inch suction lines, requiring proper brazing technique. Metal exhaust flue and 120V single-phase power at 21.8 to 35 amp breaker sizing mean most residential installations work without electrical upgrades.

Warranty & Reliability

Goodman provides a solid 10-year parts warranty on the condenser unit with online registration requirement. This covers manufacturing defects across the two-stage compressor, scroll motor, and internal components. The warranty is transferable but requires proof of registration, so document the purchase immediately. Labor and refrigerant are not covered, which is industry standard for this price tier.

Specifications

SKU	CAPF3743C6
Brand/Manufacturer	Goodman
Cooling BTU	36,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	70.4
Weight (in lbs)	63.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	35 amps
Min. Breaker Size	21.8 amps
Tonnage	3.5 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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

How does the 16 SEER rating compare to other budget systems at this price? +

16 SEER is competitive in the under-$1,000 segment. Mid-range systems often rate 14-15 SEER, so this Goodman edges ahead slightly. Premium brands command $1,500+ for similar SEER ratings. The two-stage compressor helps achieve this efficiency by reducing on-off cycling during partial-load conditions.

Does this system work with both R410A and R22 refrigerant? +

The specs list R410A or R22 compatibility, but verify with your supplier since many regions phase out R22. R410A is standard for new installations and offers better efficiency. Existing R22 systems can potentially use this condenser with proper conversion, though that's labor-intensive and expensive.

Will the 80% AFUE furnace cost significantly more to operate than 95% models? +

In moderate climates, the difference is 15-20% annually in heating costs. A $1,500 premium for 95% AFUE requires roughly 10-15 years to recover through utility savings. For renters or those staying under five years, the 80% model saves upfront money. Regional heating demand matters significantly.

Is this system adequate for a 2,000-square-foot home in a cold climate? +

The 100,000 BTU furnace and 36,000 BTU cooling capacity suit 2,000 square feet in moderate climates well. Cold regions with extreme winters may need higher tonnage or supplemental heat. Have a manual J load calculation performed before installation to confirm sizing for your specific location.

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

The warranty covers compressor failure, motor defects, and internal refrigerant system problems. It does not cover labor costs or refrigerant charges. Damage from improper installation or maintenance voids coverage. Registration documentation is required to activate coverage.

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