Air Conditioning in Crystal Lake, IL

Our Services

Heating Service - Efficient Heating & Cooling


Efficient specializes in cost-effective, energy efficient heating services, including furnace...

Air Conditioning - Efficient Heating & Cooling

Air Conditioning

Want to achieve maximize indoor comfort, energy efficiency, and energy bill savings with your...

Indoor Air Quality - Efficient Heating & Cooling

Indoor Air Quality

Are you suffering from allergy like symptoms in your own home?

Indoor Air Quality Assessment - Efficient Heating & Cooling

Indoor Air Quality Assessment

Looking for an energy audit company near you?

Service & Maintenance - Efficient Heating & Cooling

Service & Maintenance

Preventive maintenance and fast repairs are essential if you want to get the most from your...

Repairs - Efficient Heating & Cooling


Just like your car, your heating and AC systems need regular maintenance and repairs to operate...

Thermostats - Efficient Heating & Cooling


With features like smartphone control and custom temperatures for different times of the day, a...

Tankless Water Heaters - Efficient Heating & Cooling

Tankless Water Heaters

An efficient water heater can have a major impact on home energy consumption, providing...

Heat Pumps - Efficient Heating & Cooling

Heat Pumps

Heat pumps are a cost effective way to heat your home in the winter months — and they can cool...

Commercial HVAC Services - Efficient Heating & Cooling

Commercial HVAC Services

Keep your employees comfortable, & your monthly heating and cooling expenses at a minimum...

Air Sealing - Efficient Heating & Cooling

Air Sealing

Protect your home from outside contaminants, and uncomfortable temperatures when you seal up the...

Water Heaters - Efficient Heating & Cooling

Water Heaters

Traditional water heaters use electricity or combustion to create the heat that is then...

Why Trust Efficient Heating & Cooling

Extensively Trained Technicians - Efficient Heating & Cooling
Extensively Trained Technicians

Our technicians are extensively trained and continually being trained on the latest technology. Rest assured we won’t be coming to your home to practice.

100% Drug Free & Background Checked - Efficient Heating & Cooling
100% Drug Free & Background Checked

You can trust the person entering your home. All of our technicians are 100% drug free and background checked to ensure your highest safety.

Family Owned & Operated - Efficient Heating & Cooling
Family Owned & Operated

We are a family owned and operated company dedicated to helping our neighbors– You can expect only honest recommendations we’d advise for our own family.


At Efficient Heating & Cooling we know that sometimes budgets can be broken by emergencies. We offer the opportunity to find a plan that fits your budget. With flexible financing options, you can invest in your house or respond to an unexpected heating or cooling need without breaking your budget!

More Details

Call Office Today: 815-347-8353
Call Cell Today: 847-204-1743
Email Today:

Accepted Payment Methods:

Payment Accepted
Business Hours:
Monday   8:00 AM  – 5:00 PM
Tuesday   8:00 AM  – 5:00 PM
Wednesday   8:00 AM  – 5:00 PM
Thursday   8:00 AM  – 5:00 PM
Friday   8:00 AM  – 5:00 PM