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Single Phase AC Air Compressors
Single phase air compressors run on standard residential and light commercial electrical service, making them the practical choice for home workshops, garages, auto shops, and small production facilities that do not have three phase power. CompressorPros carries 115V and 230V single phase models from under 1 HP up to 10 HP, spanning portable, stationary, and rotary screw configurations. Browse by voltage, horsepower, or tank size to find the right match for your circuit and workload.
What Are Single Phase AC Air Compressors?
A single phase air compressor is an electric compressor designed to operate on single phase alternating current, which is the standard power supply found in homes, small businesses, and most commercial buildings without dedicated industrial electrical service. These units plug into 115V (standard household outlet) or direct wired to 230V circuits and cover a wide performance range, from lightweight hand-carry models for finish work to stationary shop compressors that power impact wrenches and spray guns all day.
Single phase compressors are the right fit for any buyer whose facility does not have three phase power or whose air demand falls within the 1-10 HP range. A unit like the Jenny K15A-30UMV 1.5 HP 115 Volt 30 Gallon Vertical Air Compressor represents the 115V end of this category, while models from 5-10 HP on 230V service handle the demands of professional shop environments.
115V vs. 230V Single Phase Air Compressors
The voltage your building provides determines which single phase compressors will work for you. This is the first and most important filter when shopping this category.
115V (110-120V) single phase air compressors plug into a standard household wall outlet. They are the most accessible option since no special wiring or electrician visit is required. However, the current draw on a 115V circuit limits the motor size to around 2 HP. These compressors are well-suited to home, hobby and craft use, light finish carpentry, inflation, and applications where the air demand is intermittent and moderate. The C-Aire P016H020-1115 1.6 HP 115 Volt 20 Gallon Horizontal Portable Air Compressor is a strong example of what 115V can deliver: enough tank capacity and CFM for sustained light-duty work.
230V (208-230V) single phase air compressors are wired directly to the breaker. Outlets for dryers or similar typically do not have the adequate wire size to operate a compressor. Running at higher voltage cuts the amperage draw in half compared to 115V at the same wattage, which allows motors from 3 HP up to 10 HP on single phase service. This is the standard voltage for auto shop compressors, contractor-grade stationary units, and any application that needs sustained CFM in the 10-25+ range. Most professional single phase compressors in the 5-7.5 HP range run on 230V.
Types of Single Phase Air Compressors
Portable Single Phase Air Compressors
Portable single phase compressors range from small hand-carry units under 30 lbs to wheeled models with 20-30 gallon tanks. Nearly all portable models run on 115V, which allows them to be used anywhere with a wall outlet. They are a practical choice for trim carpenters, home shop owners, mobile repair work, and any situation where the compressor moves with the job. Note: It is not recommended to use an extension cord as this may cause excessive amp draw and could void your warranty.
Stationary Reciprocating (Piston) Air Compressors
Stationary reciprocating compressors make up the core of the single phase category at the 3-10 HP level. These are floor-mounted units with 60-120 gallon tanks, belt-driven pumps, and enough CFM to power impact wrenches, sanders, spray equipment, and other professional tools. The BelAire 4916V 5 HP 1 Ph 2 Stage 60 Gallon Air Compressor is a popular entry point, while the EMAX ESP10V080V1 represents the upper performance limit available on single phase power.
Single Phase Rotary Screw Air Compressors
Single phase rotary screw compressors offer continuous-duty operation, lower noise levels, and smoother airflow compared to reciprocating models of similar output. They are available from about 5 to 7.5 HP on 230V single phase service and are particularly effective for shops that run air tools for extended periods throughout the day. The EMAX ERIK0100001 is a tank-mounted unit that delivers industrial-grade continuous airflow without requiring three phase electrical service.
Single Stage vs. Two Stage
Within the single phase category, buyers also choose between single stage and two stage pump designs. This distinction affects maximum pressure, efficiency, and how well the compressor handles sustained loads.
Single Stage Air Compressors
Single stage compressors compress air to full tank pressure in one piston stroke. They are simpler in design, typically less expensive, and adequate for applications where the compressor cycles on and off rather than running continuously. Most single stage units max out around 125-135 PSI and are common in the 1-5 HP range. They are well-suited to home garages, light shop work, and intermittent tool use.
Two Stage Air Compressors
Two stage compressors compress air in two steps with an intercooler between stages, reaching pressures up to 175 PSI with greater efficiency and less heat buildup. At the 5-10 HP level on single phase power, two stage is the standard for professional use. The C-Aire A075V080-1230 7.5 HP 208-230 Volt Single Phase Two Stage 80 Gallon Air Compressor and the Quincy 471CS80VCB 7.5 HP PRO Two Stage 80 Gallon Vertical Air Compressor are representative two stage models that deliver strong CFM output on a single phase 230V circuit.
Key Specifications to Compare
- Voltage: Determines which circuits the compressor can use. 115V units plug into standard outlets. 230V units require a dedicated circuit with the appropriate breaker. Always verify the exact voltage listed on the compressor nameplate against your building's available service.
- Amperage: Single phase motors draw more amperage than three phase motors of equivalent HP. A 5 HP single phase compressor may draw 22-28 amps at 230V and require a 40 amp breaker. Confirm that your circuit breaker and wire gauge can handle the compressor's full-load amp rating plus startup surge.
- CFM (Cubic Feet per Minute): The primary measure of working output. Match CFM to your highest-demand tool at the pressure it requires. Single phase compressors typically deliver 4-25 CFM depending on HP and stage count.
- HP (Horsepower): Single phase compressors range from under 1 HP (115V portable) to 10 HP (230V stationary). Single phase limits are approximately 2 HP at 115V and 10 HP at 230V, though most manufacturers cap single phase units at 7.5 HP.
- Tank Capacity (Gallons): Ranges from 1-6 gallons for hand-carry units up to 80-120 gallons for stationary shop compressors. Larger tanks reduce pump cycling and provide steadier pressure for tools with intermittent demand patterns.
- Max PSI: Single stage models typically reach 125-135 PSI. Two stage models reach 145-175 PSI. Higher PSI stores more energy per tank fill, which extends time between pump cycles.
Matching the correct voltage and amperage to your electrical service is the most critical step. A compressor that trips breakers or requires wiring your building cannot support creates more problems than it solves.
Brands Carried
- BelAire: Offers a deep lineup of single phase two stage compressors from 5-7.5 HP, known for cast iron pump construction and reliable performance in commercial shop environments.
- C-Aire: Carries both 115V portable and 230V stationary single phase models across a wide HP range, with competitive pricing and solid parts availability.
- Quincy: An established American brand offering PRO-series single phase compressors with precision-built pumps and long service intervals.
- EMAX: Produces industrial-grade single phase compressors up to 10 HP with heavy-duty cast iron construction designed for demanding shop use.
- Elgi: Provides single phase rotary screw compressors that bring continuous-duty, low-noise operation to facilities without three phase power.
- Jenny: An American manufacturer with a broad range of 115V and 230V single phase compressors spanning portable, single stage, and two stage configurations.
- Toledo Tools: Single Phase rotary screw air compressors 5 - 7.5 HP.
CompressorPros carries these and other trusted brands so buyers can compare single phase options across voltages, compressor types, and performance levels from a single source.
Frequently Asked Questions
What is the difference between single phase and three phase air compressors? Single phase power uses one alternating current wave and is the standard in homes and small commercial buildings. Three phase power uses three overlapping waves and is common in industrial facilities. Single phase compressors are available up to about 10 HP, while three phase compressors scale much higher. If your building only has single phase service, you need a single phase compressor. Voltage converters are not recommended and may void your warranty.
What is the most common mistake when buying a single phase compressor? Not checking the amperage draw against the circuit's capacity. A 5 HP single phase compressor can pull 25+ amps at startup on a 230V circuit requiring a 40 amp breaker. If the breaker or wiring is undersized, the compressor will trip the breaker repeatedly. Always compare the compressor's full-load amperage and locked-rotor amperage to your circuit's breaker rating and wire gauge before purchasing. A formula to determine breaker size is 1.78 x FLA.
Can I run a 230V compressor on a standard wall outlet? No. A 230V compressor requires a dedicated 230V circuit. A licensed electrician can install one if your panel has the capacity. This is typically a straightforward job in most residential and commercial buildings.
How much HP can I get on single phase power? Most manufacturers offer single phase compressors up to 7.5 HP, with some models reaching 10 HP. Beyond 10 HP, three phase power is generally required.
Do single phase compressors cost more to run than three phase? At equivalent horsepower, single phase motors are slightly less efficient than three phase motors, which can result in marginally higher electricity costs over thousands of hours. For most small-to-mid-size shops, the difference is minimal compared to the cost of installing three phase service.
Does CompressorPros offer free shipping on single phase compressors? Yes. All orders ship free, direct from the manufacturer.
Shop Single Phase AC Air Compressors at CompressorPros
CompressorPros carries a full selection of single phase air compressors, from 115V hand-carry and portable models to 230V stationary shop compressors and single phase rotary screw units. Whether you need a plug-and-go 115V compressor for the home garage or a 7.5 HP two stage unit for a professional shop, the right model is here.
All orders ship free, direct from the manufacturer. For help selecting the right model for your needs, reach out by phone (803-339-0445), email (info@compressorpros.com) or request a quote.