Professional AC Installation & Replacement in Chicago
Stay cool all summer with a new, high-efficiency air conditioning system installed by the experts at 999 Heating & Cooling. We size, install, and test every system to ensure maximum comfort and efficiency.
Why Choose 999 Heating & Cooling
- Free in-home estimates with no obligation
- Proper Manual J load calculation for correct sizing
- High-efficiency systems up to 20+ SEER2
- Top brands: Carrier, Lennox, Trane, and more
- Professional installation with full warranty
- Financing options available
Signs You Need a New AC System
If your air conditioner is over 12–15 years old, requires frequent repairs, uses R-22 refrigerant, or struggles to keep your home comfortable, it may be time for a replacement. A new high-efficiency system can significantly reduce your cooling costs and improve your home's comfort.
High-Efficiency Systems
Today's air conditioners are dramatically more efficient than systems from even 10 years ago. We install systems with SEER2 ratings up to 20+ that can cut your cooling costs by 30–50% compared to an older unit. We will help you find the right balance of upfront cost and long-term savings.
Ductless Mini-Split Installation
For homes without existing ductwork, room additions, garages, or spaces that need independent temperature control, ductless mini-split systems are an excellent solution. We install single-zone and multi-zone mini-split systems from leading manufacturers.
What the Installation Process Looks Like
We start with a free in-home estimate and load calculation. Once you approve the proposal, we schedule installation at your convenience. Our crew handles everything — removing the old equipment, installing the new system, connecting refrigerant lines, testing the system, and walking you through operation. Most installations are completed in one day.
Frequently Asked Questions
What size AC do I need for my home?
AC sizing depends on your home's square footage, insulation levels, ceiling height, window area, and sun exposure. We perform a proper Manual J load calculation to determine the correct size — an oversized or undersized system will be inefficient and uncomfortable.
How long does AC installation take?
Most central AC replacements are completed in 4–8 hours. New installations that require additional work such as refrigerant line routing may take longer. We will give you a clear timeline during your estimate.
What is SEER2 and why does it matter?
SEER2 (Seasonal Energy Efficiency Ratio 2) measures how efficiently an air conditioner uses electricity. Higher SEER2 ratings mean lower operating costs. The minimum in Illinois is 14.3 SEER2; we offer systems up to 20+ SEER2 for maximum efficiency.
Do you offer financing?
Yes. We offer flexible financing options to make a new AC system affordable. Ask about our current promotions when you call for your free estimate.
Other Services We Offer
Ready to Schedule AC Installation & Replacement?
Call us now or book online. We serve Chicagoland and surrounding areas.