Quick Answer: Types of HVAC Systems and Units
| HVAC system or unit | What it does |
|---|---|
| Split system | Uses separate indoor and outdoor equipment to provide heating and/or cooling through ductwork. |
| Ductless mini-split | Provides heating and cooling to individual rooms or zones without requiring ductwork. |
| Packaged system | Combines major heating and cooling components in one outdoor cabinet connected to the home's ductwork. |
| Geothermal system | Uses underground loops to transfer heat between the home and the earth for heating and cooling. |
| Heat pump | Transfers heat between indoors and outdoors to provide both heating and cooling. |
| Air conditioner | Removes heat and humidity from indoor air and transfers the heat outdoors. |
| Furnace | Generates heat and distributes warm air through the home's ductwork. |
| Fan coil | Moves air across a heating or cooling coil before distributing conditioned air throughout the home. |
| Evaporator coil | Absorbs heat from indoor air as refrigerant evaporates inside the coil. |
| Boiler | Uses hot water or steam to provide radiant heat through radiators, baseboards, or underfloor systems. |
For sizing context, residential air conditioners commonly range from 1.5 to 5 tons, or approximately 18,000 to 60,000 BTUh. Actual equipment sizing should be determined through a professional load calculation rather than square footage alone.
What is an HVAC System?
An HVAC system (Heating, Ventilation, and Air Conditioning) is a comprehensive climate control solution designed to regulate indoor temperature, humidity, and air quality. Unlike a standalone unit, a system consists of interconnected components working in unison to create a healthy, comfortable, and energy-efficient home environment.
The Three Core Functions
To achieve total home comfort, an HVAC system relies on three primary pillars:
- Heating: Keeps your home warm during colder months using furnaces, boilers, or heat pumps.
- Ventilation: Exchanges stale indoor air with fresh outdoor air. It filters out pollutants, allergens, and odors to significantly improve indoor air quality.
- Air Conditioning: Cools and dehumidifies indoor spaces during warm weather, ensuring a consistent and comfortable climate.
Why is an HVAC System Important?
Beyond basic temperature control, a modern home HVAC system provides year-round thermal comfort and can help manage indoor humidity and air quality. The specific capabilities of an HVAC system depend on the equipment, controls, ductwork, ventilation, and indoor air quality products installed.
Types of HVAC Systems
Carrier offers split, ductless, packaged, and geothermal HVAC systems, each designed for different home layouts, climates, and comfort requirements. Efficiency varies by model and system configuration, so the ratings below represent examples of current Carrier equipment rather than universal ranges for every system.
Split Systems
Carrier split HVAC systems use separate indoor and outdoor equipment connected by refrigerant lines, with the indoor equipment typically distributing conditioned air through ductwork. Carrier's current residential air conditioner lineup includes models with up to 21 SEER2 cooling efficiency in the Infinity 21 Air Conditioner (26VNA1), while the Infinity® 23 Heat Pump (27VNA3) features SEER2 cooling efficiency of 23.
- How it works: An outdoor unit (containing the condenser and compressor) pairs with an indoor unit (containing the evaporator coil and air handler). The indoor unit distributes conditioned air through ductwork.
- Best for: Homes with existing ductwork looking for reliable, whole-home comfort.
- Learn more: What is a split system?
Key Components and Benefits
- Outdoor Unit: Houses the compressor and condenser coil, responsible for releasing heat in the summer.
- Indoor Unit: Contains the evaporator coil and a blower motor to circulate air.
- Energy Efficiency: Modern split systems feature high SEER2 (Seasonal Energy Efficiency Ratio), EER2 (Energy Efficiency Ratio), HSPF2 (Heating Seasonal Performance Factor 2,) and AFUE (Annual Fuel Utilization Efficiency) ratings, reducing monthly energy bills.
- Reliability: Proven technology that provides consistent, whole-home comfort even in extreme weather conditions.
What is an HVAC System?
An HVAC system (Heating, Ventilation, and Air Conditioning) is a comprehensive climate control solution designed to regulate indoor temperature, humidity, and air quality. Unlike a standalone unit, a system consists of interconnected components working in unison to create a healthy, comfortable, and energy-efficient home environment.
The Three Core Functions
To achieve total home comfort, an HVAC system relies on three primary pillars:
- Heating: Keeps your home warm during colder months using furnaces, boilers, or heat pumps.
- Ventilation: Exchanges stale indoor air with fresh outdoor air. It filters out pollutants, allergens, and odors to significantly improve indoor air quality.
- Air Conditioning: Cools and dehumidifies indoor spaces during warm weather, ensuring a consistent and comfortable climate.
Why is an HVAC System Important?
Beyond basic temperature control, a modern home HVAC system is essential for well-being. It provides thermal comfort year-round, regulates humidity to prevent mold or dryness, and filters out contaminants to help you breathe easier.
Types of HVAC Systems
HVAC systems come in several configurations, each engineered to solve specific infrastructure and comfort challenges. Here is an overview of the most common types.
Split Systems
A split HVAC system is the most common residential setup. It separates the heating and cooling functions into two main parts connected by copper tubing.
- How it works: An outdoor unit (containing the condenser and compressor) pairs with an indoor unit (containing the evaporator coil and air handler). The indoor unit distributes conditioned air through ductwork.
- Best for: Homes with existing ductwork looking for reliable, whole-home comfort.
- Learn more: What is a split system?
Key Components and Benefits
- Outdoor Unit: Houses the compressor and condenser coil, responsible for releasing heat in the summer.
- Indoor Unit: Contains the evaporator coil and a blower motor to circulate air.
- Energy Efficiency: Modern split systems feature high SEER2 (Seasonal Energy Efficiency Ratio) and AFUE (Annual Fuel Utilization Efficiency) ratings, reducing monthly energy bills.
- Reliability: Proven technology that provides consistent, whole-home comfort even in extreme weather conditions.
