Categories HVAC installation, HVAC repair

Common HVAC System Types

Residential home in Orange County with modern HVAC setup

All Set Service is a licensed HVAC company serving Orange County, California. We understand homeowners and small businesses have many heating and cooling options. Below we explain the most common HVAC system types, how they work, and when each is ideal. All Set Service installs and services all these system types, so you can trust our team with any heating and cooling setup.

 

Residential home in Orange County with modern HVAC setup

 

Types of HVAC Systems

  • Split (Central) Systems: These are the traditional whole-house systems. An outdoor condenser unit cools the air, while an indoor furnace or air handler provides heating through ducts. A single thermostat controls both. In Southern California’s mild climate, split systems often use electric heat pumps that move heat in or out rather than burning gas. This makes them energy-efficient for year-round comfort. Split systems are ideal for most single-family homes and small offices.

  • Ductless (Mini-Split) Systems: Ductless mini-splits heat or cool without any ductwork. Each indoor zone has its own wall-mounted air handler connected by a refrigerant line to an outdoor compressor. You can install one indoor unit per room (or multiple heads on one outdoor unit), giving precise zone control. Ductless systems are perfect for room additions, garages, or buildings without ducts, and they work well in multifamily homes or small commercial spaces.

  • Packaged (Rooftop) Units: These systems house all heating and cooling components in a single outdoor cabinet. Often placed on a roof or on a slab by the building, they connect to the ductwork through one wall. Packaged units save indoor space and simplify installation because everything is in one box. They are common in light commercial buildings or homes without basements. Because of the compact design, packaged systems are easier to install and service while still providing full comfort.

 

Commercial rooftop HVAC unit installed on a flat roof

 

Regardless of the type you choose, All Set Service installs and services all these HVAC systems. We are based in Huntington Beach and serve Orange County cities like Irvine, Costa Mesa, Newport Beach, Santa Ana and beyond. Whether you need a central split system, a ductless mini-split, or a rooftop packaged unit, our licensed team will provide the right HVAC installation in Orange County and keep it running smoothly.

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Categories HVAC installation

Daikin Ductless Mini-Split Installation in Irvine, CA

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All Set Service recently completed a successful installation of a 1-ton Daikin ductless mini-split system in an accessory dwelling unit (ADU) at a residential property in Irvine, California. The energy-efficient inverter unit (with built-in Wi-Fi) provides exceptional climate control without any bulky ductwork.

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  • Energy Efficiency: By transferring rather than generating heat, ductless mini-splits use significantly less energy than conventional systems. The inverter compressor modulates power to maintain precise temperature control, reducing utility costs.

  • Quiet Comfort: Daikin’s adaptive inverter technology automatically adjusts compressor speed for optimal comfort and efficiency. The indoor unit operates at whisper-quiet levels (around 19 decibels), so cooling and heating is virtually silent indoors.

  • Air Quality: The ductless setup eliminates ductwork (and its dust and allergens), improving indoor air quality by avoiding buildup in vents.

  • Convenience: Built-in Wi-Fi control allows the homeowner to adjust settings from a smartphone or smart device for easy scheduling and monitoring.

  • Easy Installation: Without ducts, a small wall conduit connects the indoor unit to the outdoor condenser. Licensed technicians from All Set Service completed the installation quickly and efficiently.

After the installation, the homeowner was very satisfied with the results. They enjoy more consistent comfort and notably quieter operation compared to the old system. In Irvine’s warm climate, the Daikin mini-split quickly cools the ADU when needed, and its inverter-driven compressor maintains a stable temperature with minimal energy waste. With no ductwork, there is virtually no indoor noise or energy loss. The homeowner also appreciates that this efficient system helps lower energy bills. All Set Service delivered high-quality workmanship for this seamless comfort upgrade. The sleek Daikin mini-split unit was an ideal match for the ADU’s needs, providing energy-efficient comfort year-round.

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HVAC Upgrade in Irvine

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Case Study: Upgrading a 24-Year-Old HVAC System in Irvine

In Irvine, a homeowner faced a major HVAC dilemma: their 24-year-old Carrier system, still using R-22 refrigerant, was nearly out of coolant and on the verge of breakdown. The aging system had suffered multiple faults and costly repair estimates. As Today’s Homeowner explains, R-22 was phased out in 2020 and prices have soared (meaning over $1,000 for a full recharge). Rather than continue throwing money at repairs for an antiquated system, our All Set Service team recommended replacing the entire unit with a new high-efficiency setup.

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We performed a load calculation and chose a 5-ton system sized for the home. The new AC Pro package included an inverter-driven outdoor condenser and a matching indoor furnace. The inverter (variable-speed) compressor continuously adjusts its speed, minimizing the wasted energy of on/off cycling and maintaining a steady temperature. We also installed a modern gas furnace built to ultra-low NOx standards, ensuring emissions below California’s 14 ng/J limi. These high-efficiency components deliver consistent comfort, lower energy use, and compliance with air-quality regulations.

003 01 AC installatiom IrvineAfter installation, the homeowner immediately noticed quieter, more responsive cooling and heating. With R-22 eliminated, the new R-410A system operates far more efficiently. In fact, Today’s Homeowner notes that a modern R-410A system can cut cooling energy use by 20–40% compared to an old unit. The customer was very pleased: their home is now comfortable and reliable, with lower expected energy bills and no more worries about costly R-22 recharges or breakdowns. This upgrade solved their immediate comfort needs and left them with long-term peace of mind.

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