Not every room in a home was built with heating and cooling in mind, especially older homes, additions, garages, and sunrooms. Climate Control Systems provides ductless mini-split system installation in Frankfort, IL, for homeowners who want year-round comfort in spaces the main system was never designed to reach. These systems heat and cool specific rooms without adding ductwork, making them a practical option for areas that are too hot in the summer or too cold in winter.

Since 1971, Climate Control Systems has installed heating and cooling systems for Frankfort-area homes and businesses, with certified technicians who handle every step in-house from load calculation through startup testing and final walkthrough. Call (815) 806-1055 or contact us online to schedule your appointment and find the right system for your space.

We install new ductless mini-split systems and handle full system replacements for residential and commercial properties throughout Frankfort, Mokena, New Lenox, Tinley Park, Bolingbrook, Plainfield, Manhattan, and the surrounding Will County area. Whether you need a single room conditioned or a full property zoned, we size and install the right system for the space.

If your current mini-split has stopped working, is producing less cooling or heating, or no longer fits your needs due to changes in the space, we will remove the old unit, reassess the load based on current conditions, and install a properly sized replacement. The replacement process follows the same steps as a new installation.

We install single-zone ductless mini-split systems with a single outdoor unit connected to a single indoor air handler. This setup is ideal for garages, sunrooms, basements, home offices, and room additions.

We connect one outdoor condenser to multiple independent indoor units, each with its own temperature control. Done properly, you can support up to five indoor zones on a single outdoor unit.

Our team removes failed or undersized units, recalculates loads for current conditions, and installs a correctly sized replacement.

During installation, our technicians size the outdoor unit to support additional indoor units without requiring a future condenser replacement.

Every residential job includes BTU load calculation, physical installation, full startup testing, and a post-install walkthrough before we leave your home.

We offer a complete range of indoor unit options to perfectly suit your space, ceiling type, wall layout, and specific needs.

• High Wall-Mounted — Mounted near the ceiling, this unit distributes air across the room from above. This is the standard configuration for bedrooms, living rooms, and most residential and commercial spaces.

• Floor-Mounted (Console) — Sits low on the wall and directs airflow upward. The ideal choice for low ceilings, limited upper wall space, attic conversions, or rooms with large exterior windows.

• Ceiling Cassette — Recesses flush into the ceiling, delivering air in multiple directions. Often used in open-plan living areas, kitchens, dining rooms, and commercial interiors where wall space is limited.

• Ceiling Suspended (Underceiling) — We install this unit flush against the ceiling surface without recessed mounting. This setup is common in commercial environments, garages, and finished basements with drop ceilings.

• Ducted / Concealed Duct — Installed within a ceiling void or utility space using short duct runs to standard registers, with no visible indoor unit. This is the ideal finishing option for whole-home setups where visible hardware is not acceptable.

We begin with a no-obligation site visit to assess your space and identify your cooling and heating needs. We review potential unit types, discuss zone configurations, and confirm whether any electrical upgrades are required before equipment is ordered.

A certified technician calculates the BTU load for each space based on square footage, ceiling height, insulation, sun exposure, and the room's use. Correct sizing prevents short-cycling, uneven temperatures, and premature wear.

Before we start the installation, we give you a clear outline of the project cost. For qualifying installations, financing is available. We also confirm which units qualify for the federal Inflation Reduction Act tax credit and Illinois state rebate programs at the time of your estimate, so you know your net cost before committing.

Our own certified technicians handle the full scope: equipment delivery, physical installation of indoor and outdoor units, refrigerant line and electrical connections, and any required penetrations through the building envelope. We do not delegate work to subcontracted technicians.

After installation, we run startup testing across all zones and confirm the system is operating correctly. We walk you through the controls, thermostat operation, and filter maintenance before we leave, so you understand how your new system works.

All installations carry our workmanship warranty. Most equipment carries a manufacturer's warranty as well. During your estimate, we confirm warranty terms applicable to your specific installation.

Traditional forced-air systems can lose a significant amount of conditioned air through ductwork before it reaches the room. Ductless systems deliver air directly from the indoor unit into the space. For Frankfort homeowners using HVAC in an older home with aging or poorly sealed ducts, this difference is evident in every utility bill.

Each indoor unit has its own thermostat and operates independently. One room can be set to 68°F while another to 72°F, without either zone affecting the other. That level of control is not possible with a single central thermostat.

A ductless mini-split is a heat pump. It cools in summer by moving heat outside and heats in winter by extracting heat from outdoor air and transferring it inside. Modern units maintain heating output at temperatures well below 0°F, covering Frankfort's January cold snaps and polar vortex events without needing a separate heating source.

Ductless units filter air at the point of delivery through built-in multi-stage filtration. There is no ductwork that accumulates dust, allergens, or mold spores and redistributes them throughout the home. The difference is noticeable in homes with people who have allergies or known duct buildup.

Modern ductless indoor units operate very quietly, making them much less noticeable than traditional systems. No blower noise through duct runs, no rattling registers, and no cycling sound from a distant air handler.

We only make a small three-inch-wide opening for refrigerant lines and electrical connections. This minimal opening helps keep the building well-insulated and secure. Most single-zone installations are complete in one day. The home or business can stay fully operational throughout the installation process.

Compatible systems allow app-based control, scheduling, and remote temperature adjustments via phone or tablet. Some models also feature push notifications for diagnostics and maintenance reminders.

Climate Control Systems has been installing and replacing heating and cooling systems for homeowners and businesses in Frankfort and Will County since 1971. Working in a single market for so long means we've focused on the housing stock, building types, and climate conditions specific to this area. When you call us, you are working with a company that has been accountable to this community for more than five decades.

Every installation is performed by our own EPA-certified technicians, all of whom are background-checked before entering your home. We do not subcontract. The technician who assesses your space and the one who installs your system are both a part of our team. All work is completed to manufacturer specifications to protect your equipment warranty from day one.

Before recommending any equipment, we calculate the correct system size for your space. If a lower-cost configuration meets your needs, we will let you know. If your layout requires a specific unit type or a larger outdoor unit to support future zones, we explain why before anything is ordered. Our team works to ensure you make an informed decision.

Once your system is installed, we are available for questions, follow-up service, and maintenance. For after-hours service needs, call (815) 806-1055. Long-term performance begins with proper installation and is supported by a contractor who backs up their work.