Heating & Cooling in Hillside
Heating and cooling service for Hillside and nearby communities
Repair, replacement and maintenance for homes and businesses. Tell us what your system is doing, and we will help you choose the next step.
Emergency service is available 24/7, including Sundays
Written Estimate
Request a Quote
Fast 15-minute callback during business hours. No obligation.
SquareHVAC company facts
Serving since 2009
Licensed, bonded & insured
Emergency service 24/7
Heating & Cooling Services
Our HVAC services
Complete heating, cooling and indoor-air service for homes and businesses in Hillside and nearby communities.
Air conditioning
Installation, repair and service to keep you cool.
Heating
Furnace and boiler service to keep your property warm.
Heat pumps
Efficient heating and cooling for year-round comfort.
Indoor air & ducts
Air cleaning, ducts and humidity control.
Maintenance
Preventive service to help your system run smoothly.
Commercial
Rooftop units, split systems and boilers for workplaces and multifamily buildings.
Equipment brands
We service all major brands
Brand names and logos are trademarks of their respective owners. Showing them does not imply authorized-dealer status or manufacturer certification.
What happens next
How service works
From your first call to a written quote and work you approve.
- 1
Tell us what's happening
Describe the problem and give us the property address.
- 2
We assess the system
We inspect the equipment and explain what we find.
- 3
Review your written quote
We explain the proposed work and cost so you can decide.
- 4
We begin after your approval
Work starts once you approve the quote.
What we bring
- Family-owned HVAC contractor based in Hillside, serving homeowners and businesses since 2009
- We work on all major brands
- Routine visits: Mon–Fri 6 AM–8 PM · Sat 8 AM–5 PM
- Emergency service is available 24/7, including Sundays
Choose your next step
What should you do next?
Not sure if you need service now or can wait? Use these signs to choose a practical next step. Talking through what your system is doing does not commit you to an appointment.
Smell gas? Leave the building and call your gas company first. Then call us.
Emergency service is available 24/7, including Sundays.
Urgent
Call now
For smoke or flames, leave the building, stay out and call 911. Call us for water leaking from equipment, or if the system has stopped after checking the thermostat and breaker.
Call (708) 673-5633Within a few days
Request service soon
Arrange a visit when rooms are uneven, performance has changed, or the system repeatedly needs attention.
Send a service requestNo rush
Monitor and plan
If heating and cooling are working normally, keep up with filter changes and plan your next routine maintenance visit. If new symptoms appear, request service sooner.
Read helpful guidesLocal Service Area
Proudly serving Hillside and nearby communities
Based on Clayton Road in Hillside, SquareHVAC serves homes and businesses in the confirmed communities shown on the map.
Questions about your town? Contact SquareHVAC to confirm service at your address.
View all service areasHelpful Information
Heating and cooling guides
Practical information to help you understand your system and decide what to do next.
What HVAC Repair Actually Costs — And What Drives the Price
Why the same HVAC repair can cost very different amounts, and what actually drives the price. A clear guide to the real cost factors.
Read the guide
Furnace Blinking 4 Times or Blowing Cold Air: What to Check
A furnace light that blinks four times often means the furnace got too hot and shut off its burners. Safe checks for a homeowner, and when to call a technician.
Read the guide
Furnace and AC Filter Guide
How to find your furnace or AC filter size, what the MERV rating means, how often to change the filter, and the signs that a filter is wrong for your system.
Read the guideCustomer Reviews
What customers say on Google
Patient explanations, straightforward communication and clear written quotes before any repair begins.
Verified on the SquareHVAC Google Business Profile. Checked October 14, 2026.
Ready for Service?
Get HVAC service for your home or business
Tell us what you are noticing, or call and describe it. We will explain the options and the price before anything begins.