Review
Goodman's 3.5-ton gas furnace and air conditioner combination occupies a well-established middle tier of the residential HVAC market. This upflow configuration targets replacement installations where existing ductwork and clearances suit standard cabinet dimensions. The 100,000 BTU heating capacity pairs with 42,000 BTU cooling output, delivering moderate capacity for typical three to four-bedroom homes. Online Supply positions this as a sensible upgrade path for contractors and homeowners seeking proven performance without premium pricing.
The furnace delivers 80% AFUE efficiency with two-stage burners and a variable-speed blower motor, features that balance heating output with modulation capability. Cooling efficiency reaches 14 SEER with a scroll compressor and single-stage condenser operating on R410A or R22 refrigerant. The variable-speed blower pulls maximum 2000 CFM and requires 208/230V single-phase 60Hz electrical service with 23.5 to 40 amp breaker sizing. Energy Star certification validates its efficiency credentials, though 80% AFUE ranks below modern 90-95% alternatives now standard in efficient replacement markets.
Pros & Cons
Pros
- Variable-speed blower motor improves comfort and reduces runtime energy waste compared to fixed-speed alternatives
- Two-stage burner on furnace allows for modulating heat output, better matching heating demand throughout the season
- Energy Star certified with 14 SEER cooling and 16 SEER2 rating for the AC portion
- Compact footprint at 30 inches tall fits many existing installations designed for standard upflow furnaces
- 10-year warranty with online registration covers manufacturing defects and provides reasonable peace of mind
- Dual fuel capability accepts natural gas or propane without modification
Cons
- 80% AFUE is dated for 2024 standards, high-efficiency alternatives at 95%+ AFUE would cut heating costs significantly in cold climates
- 14 SEER cooling efficiency lags behind modern 16-18 SEER systems that compete at similar price points
- Single-stage condenser limits cooling modulation on mild days, forcing full-capacity operation when partial cooling would suffice
- 73 dB noise level runs louder than premium variable-capacity models, noticeable during blower operation
- Specs show conflicting tonnage data, listing both 3.5 tons and 5 tons, creating confusion about actual cooling capacity
Who Should Buy
Best For
Homeowners in moderate climates replacing 15+ year old systems who prioritize reliability and straightforward installation over cutting-edge efficiency. Contractors needing a dependable mid-range option for residential replacement jobs where budget constraints limit AFUE or SEER upgrades.
Consider Alternatives If
Cold-climate homeowners should pursue 90%+ AFUE furnaces. Those in hot regions need higher SEER ratings. Anyone prioritizing lowest operating costs over initial savings should compare 95% AFUE and 16+ SEER alternatives first.
Installation
Installation demands metal flue venting for the furnace exhaust and standard R410A lineset connections using 3/8-inch liquid and 1 1/8-inch suction lines with 1/2-inch insulation thickness rated for 50 feet maximum run. The 30-inch height and 21-inch width and depth fit most upflow closet installations. Dual-fuel setup requires only gas line selection, no hardware changes. Two-stage burner and variable-speed blower integration adds modest complexity but remains within standard contractor skill levels.
Warranty & Reliability
Goodman provides a 10-year parts warranty when buyers register online, covering manufacturing defects across the furnace and air conditioning components. Registration is essential, as coverage drops significantly without it. This timeframe aligns with industry mid-range offerings and provides adequate protection for systems in normal residential use, though premium brands extend to 12-15 years on select units.
Specifications
| SKU | LS381183850 |
| Brand/Manufacturer | Online Supply |
| Cooling BTU | 42,000 |
| Heating BTU | 100,000 |
| 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 |
| 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 |
| 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. |
| 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 | 40 amps |
| Min. Breaker Size | 23.5 amps |
| Tonnage | 5 Ton |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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