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What's in this package
Every piece below is included in your system price — matched to optimize efficiency, power and compatibility. Tap a piece to see its full description, specs and manuals.
Piece 1 of 2 — CENTRAL CONDENSER
The Goodman GLZSM4 is a 1.5 Ton split system heat pump delivering up to 15.2 SEER2 / 14.3 SEER2 / 7.8 HSPF2 efficiency with SmartShift technology for quiet, reliable defrost. Features a high-efficiency compressor, enhanced aluminum fin coils, and single-speed PSC condenser fan motor. Ships fully charged for 15' of tubing length. Built in a heavy-gauge galvanized steel cabinet. AHRI Certified and ETL Listed.
Features- High-efficiency compressor
- SmartShift® technology to ensure quiet reliable defrost
- Enhanced aluminum fin coil- 5 mm diameter on 1.5T-3.5 Ton
- Enhanced aluminum fin coil with 7mm diameter copper tubes in 4.0- to 5.0-ton
- Single-speed PSC condenser fan motor
- Factory-installed bi-flow liquid-line filter drier
- Factory-installed suction-line accumulator
- Factory-installed compressor crankcase heater
- Factory-installed high-capacity muffler
- High- and low-pressure switches
- Service valves with sweat connections and easy access to gauge ports
- Fully charged for 15’ of tubing length
- Fully enclosed contractor with lug connection
- Ground lug connection
- Capacitors with extended life
- AHRI Certified
- ETL Listed
- Removable grille-style top design compliant with UL 60335-2-40
- Steel louver coil guard
- Heavy-gauge galvanized-steel cabinet
- Attractive Architectural Gray powder-paint finish with 500-hour salt-spray approval
- Top and side maintenance access
- When properly anchored, meets the 2023 Florida Building Code unit integrity requirements for hurricane-type winds (Anchor bracket kits available).
DIMENSIONS & WEIGHT
- Height
- 32.5 in
- Width
- 29 in
- Depth
- 29 in
- Weight
- 160 lb
GENERAL INFORMATION
- Brand
- Goodman
- Series
- GLZSM4
- SKU
- GLZS4MA1810
- Product Category
- Unitary
- Unit Type
- Outdoor
- Manufacturer
- Goodman
- Product Features
- High-efficiency compressor
- SmartShift® technology to ensure quiet reliable defrost
- Enhanced aluminum fin coil- 5 mm diameter on 1.5T-3.5 Ton
- Enhanced aluminum fin coil with 7mm diameter copper tubes in 4.0- to 5.0-ton
- Single-speed PSC condenser fan motor
- Factory-installed bi-flow liquid-line filter drier
- Factory-installed suction-line accumulator
- Factory-installed compressor crankcase heater
- Factory-installed high-capacity muffler
- High- and low-pressure switches
- Service valves with sweat connections and easy access to gauge ports
- Fully charged for 15’ of tubing length
- Fully enclosed contractor with lug connection
- Ground lug connection
- Capacitors with extended life
- AHRI Certified
- ETL Listed
CAPACITY & PERFORMANCE
- Cooling BTU
- 18000 Btu/H
- Heating BTU
- 17400 Btu/H
- Cooling Operating Range
- 55 °F to 125 °F
- Heating Operating Range
- -20 °F to 70 °F
- SEER2
- 15.2
- HSPF2
- 7.8
- EER2
- 12.5
COMPRESSOR & MOTORS
- Compressor Type
- Scroll
- Compressor Stages
- Single Stage
NOISE LEVELS
- Decibel Level (dBA)
- 69 dBA
ELECTRICAL REQUIREMENTS
- Voltage/Phase/Hz
- 208/240 V / 1 Ph / 60 Hz
- Max Breaker Size
- 15 A
- Min. Breaker Size
- 11.4 A
REFRIGERANT & PIPING
- Refrigerant
- R-32
- Factory Refrigerant Charge
- 71 oz
- Liquid Line
- 3/8 in
- Suction Line
- 7/8 in
- Max Line Set Length
- 200 ft
SAFETY
- ENERGY STAR® Certified
- No
- Safety Information
- R32 Outdoor
- Proposition 65 Warning
- Yes
WARRANTY
- Warranty
- ALL PARTS - 5 YEARS PARTS
Piece 2 of 2 — MINI SPLIT AIR HANDLER
The Goodman ACST Air Handler delivers reliable indoor comfort in a compact 1.5 Ton design with multi-speed ECM motor for efficient, quiet operation. Featuring a factory-installed TXV, all-aluminum evaporator coil, and optional electric heat kits from 5-10 kW, this unit provides flexible heating and cooling solutions. Built with galvanized-steel construction and optimized for R-32 refrigerant with factory-installed leak detection sensor. AHRI Certified and ETL Listed.
Features- Factory installed TXV for heat pump and cooling-only applications
- All-Aluminum tube/aluminum fin coil
- Direct-drive, resilient-mount, multi-speed motor
- Sequence-controlled and rust-resistant nickel chromium heating elements of 5, 6, 8 and 10 kW
- High-efficiency evaporator coil
- Quiet operation
- AHRI Certified
- Suitable for both front and bottom return
- Factory installed casing
- UL 2-40 cerified
- 10. ETL Listed
- 1Suitable for free-return installation (non-ducted return air)
- 1Galvanized-steel construction
- 1Factory-installed pull-type disconnect
- 1Easy service access
- 1Optimized for use with R-32 refrigerant with factory installed leak detection sensor for A2L mitigation.
- Primary/secondary drain connection in a high-temperature plastic drain pan
- Suitable for free-return installation (non-ducted return air)
- Galvanized-steel construction
- Factory-installed pull-type disconnect
- Easy service access
- Suitable for both front and bottom return
- Factory installed casing
DIMENSIONS & WEIGHT
- Height
- 11 in
- Width
- 48-1/5 in
- Depth
- 22.2 in
- Weight
- 85 lb
GENERAL INFORMATION
- Brand
- Goodman
- Series
- ACST
- SKU
- ACST18MU1305
- Product Category
- Unitary
- Unit Type
- Indoor
- Manufacturer
- Goodman
- Product Features
- 1. Factory installed TXV for heat pump and cooling-only applications;2. All-Aluminum tube/aluminum fin coil;3. Direct-drive, resilient-mount, multi-speed motor;3. Sequence-controlled and rust-resistant nickel chromium heating elements of 5, 6, 8 and 10 kW;4. High-efficiency evaporator coil;5. Quiet operation;6. AHRI Certified;7. Suitable for both front and bottom return;8. Factory installed casing;9. UL 2-40 cerified;10. ETL Listed;11. Suitable for free-return installation (non-ducted return air);12. Galvanized-steel construction;13. Factory-installed pull-type disconnect;14. Easy service access;15. Optimized for use with R-32 refrigerant with factory installed leak detection sensor for A2L mitigation.
CAPACITY & PERFORMANCE
- Tonnage
- 1.5
ELECTRICAL REQUIREMENTS
- Voltage/Phase/Hz
- 208/230 V / 1 Ph / 60 Hz
- Max Breaker Size
- 30/30 A
- Min. Breaker Size
- 25.1/28.5 A
REFRIGERANT & PIPING
- Factory Refrigerant Charge
- 0 oz
- Liquid Line
- 3/8 in
- Suction Line
- 3/4 in
SAFETY
- Proposition 65 Warning
- Yes
WARRANTY
- Warranty
- ALL PARTS - 5 YEARS PARTS
Authorized Goodman Dealer
Full manufacturer warranty on every Goodman product we sell.
Central Split System FAQs
What is a central HVAC system?
A central HVAC system uses a network of ducts to heat and cool your entire home from a single unit. It typically consists of an outdoor condenser (or heat pump) and an indoor air handler connected by refrigerant lines, distributing conditioned air through vents in every room.
What's the difference between a heat pump system and a traditional A/C system?
A heat pump can both heat and cool your home by reversing its refrigerant cycle, making it a year-round solution without a separate furnace. A traditional central A/C system only cools — you'd pair it with a gas furnace or electric air handler for heating. Heat pumps are generally more energy-efficient in moderate climates.
What size central HVAC system do I need?
Sizing depends on your home's square footage, insulation, climate zone, and ceiling height. As a general rule: 1 ton of cooling covers roughly 400–600 sq ft. A 2,000 sq ft home typically needs a 3–4 ton system. Use our live chat to speak with an HVAC specialist who can help you size correctly.
Can I buy a central HVAC system online and install it myself?
You can purchase central HVAC equipment online and save significantly versus buying through a local contractor. However, installation must be performed by a licensed HVAC technician in most states — the refrigerant handling and electrical work require certification. We recommend buying the equipment here and hiring a local installer separately.
What SEER2 rating should I look for?
SEER2 (Seasonal Energy Efficiency Ratio 2) measures cooling efficiency — higher numbers mean lower energy costs. Federal minimums are 14–15 SEER2 depending on your region. For the best long-term savings, look for systems rated 16 SEER2 or higher. Many of our MRCOOL and Senville systems reach 17–18 SEER2.
Does Home Outlet Direct offer financing for central HVAC purchases?
Yes. Financing is available on qualifying orders, making it easier to invest in a high-efficiency central HVAC system without paying everything upfront. See our financing page for details on terms and eligibility.
Do central HVAC systems from Home Outlet Direct come with a warranty?
All systems come with the manufacturer's warranty. We also offer extended warranty and protection plans for added peace of mind. Brands like MRCOOL and Goodman are backed by industry-leading coverage.
What is a Goodman split system?
A Goodman split system is a central HVAC setup with an outdoor condenser and an indoor air handler or furnace. Together they provide whole-home heating and cooling, offering better efficiency and quieter operation than window units.
What SEER2 ratings do Goodman split systems come in?
Goodman central split systems range from 14.3 SEER2 up to 22.5 SEER2 depending on the model, with higher ratings meaning greater energy savings on monthly utility bills.
Do Goodman split systems come with a warranty?
Yes. Goodman offers industry-leading limited warranties — typically up to 10 years on parts when registered — giving homeowners long-term peace of mind on their investment.
What size Goodman split system do I need?
Sizing depends on your home's square footage. For example, a 1.5-ton system typically covers 600–1,000 sq. ft., while a 4-ton system suits 2,200–2,600 sq. ft. An HVAC professional can perform a Manual J load calculation for accuracy.
What refrigerant do Goodman central split systems use?
Current Goodman split systems use R-32 refrigerant, which has a lower global warming potential (GWP) than older R-410A systems, making them a more eco-friendly choice.
Can I install a Goodman split system myself?
Goodman split systems require professional installation by a licensed HVAC technician, both for safety and to keep the manufacturer's warranty valid.
Does Home Outlet Direct offer free shipping on Goodman split systems?
Yes, Home Outlet Direct offers free shipping on Goodman central split systems along with wholesale pricing, making it one of the most affordable ways to purchase a full HVAC kit online.