A professional AC installation in Dearborn Heights typically involves a home inspection, a load calculation to size the system correctly, equipment selection, a one-day install, and a final system test.
At Mechanical Heating, Cooling & Electrical, most installations and local AC repairs are completed start to finish within a single day.
If you’ve decided it’s time for a new system rather than another round of AC repair, here’s what actually happens from the first call to the final walkthrough.
Is AC Repair Enough, or Do You Need a New System?
Before recommending installation, we always check whether a repair could solve the problem first.
If your unit is under 10 years old, hasn’t needed frequent repairs, and the issue is a single, affordable fix, our AC repair services team will say so.
We weigh your system’s age, how often you’ve called for local ac repair, and whether the repair cost is reasonable relative to a new system.
If your AC repair company has already flagged a pattern of breakdowns, installation becomes the smarter investment.
What Happens During the Initial Home Assessment?
Every AC installation in Dearborn Heights homeowners schedule with us starts with an in-home evaluation, not a quote over the phone.
Our team checks square footage, insulation, window count, ceiling height, and existing ductwork; this directly determines what size system your home needs, which affects both comfort and long-term energy costs.
How Is the Right AC Size Determined?
The correct system size is calculated using a Manual J load calculation, the ACCA industry standard for sizing residential HVAC equipment.
- An oversized unit cools too fast, short-cycles, and fails to remove humidity properly
- An undersized unit runs constantly and never quite reaches your set temperature
- A properly sized unit cools evenly, runs efficiently, and lasts longer
Skipping this step is one of the most common and costly installation mistakes.
What Equipment Options Will You Be Offered?
Your installer should present options based on your home’s load calculation, budget, and efficiency goals, not a single default system.
As a Carrier Factory Authorized Dealer, we typically walk homeowners through standard efficiency, mid-tier, and high-efficiency variable-speed systems.
| Installation Stage | What Happens |
| Home assessment | The technician evaluates the space, ductwork, and insulation. |
| Load calculation | A Manual J sizing calculation is performed to determine the right system size. |
| Equipment selection | Homeowners review available system options and pricing. |
| Permitting | The contractor handles required local permits. |
| Installation day | The old unit is removed, and the new system is installed and tested. |
| Final walkthrough | The technician explains system operation, thermostat settings, and warranty details. |
What Does AC Installation Typically Cost?
Cost depends mainly on system size, efficiency tier, and whether ductwork is needed — not a flat, one-size-fits-all price.
Higher-SEER, variable-speed systems cost more upfront but typically result in lower monthly bills, while ductwork or electrical upgrades add to the base price. We provide a written, itemized quote covering equipment, labor, and any add-ons.
What Happens on Installation Day?
Most residential installations take one day, though larger homes or ductwork modifications may need extra time.
Our team removes the old unit, installs the new indoor and outdoor components, connects refrigerant lines, and tests the system for airflow and cooling performance.
Before leaving, we also explain thermostat settings, warranty details, and basic maintenance steps.
What Should You Ask Before Hiring an Installer?
Before hiring, ask any installer:
- Will you perform a Manual J load calculation before recommending equipment size?
- Are your technicians licensed, insured, and factory-certified for the brand you’re installing?
- Does the quote include permitting, and is pricing flat-rate or subject to change?
- What warranty coverage applies to equipment and labor?
Frequently Asked Questions
How long does a typical AC installation take?
Most single-family homes are completed in one day, generally 4-8 hours, depending on system type and ductwork changes needed.
Can I install a new AC system without replacing my ductwork?
Often, yes, if your existing ductwork is properly sized and in good condition, your technician will assess this during the home evaluation.
What warranty comes with a new AC installation?
Warranty terms vary by manufacturer and installer. Confirm both in writing before the job begins.
Ready to Schedule Your Installation?
A proper AC installation comes down to accurate sizing, transparent pricing, and a team that stands behind the work. Serving Dearborn Heights since 1983, Mechanical Heating, Cooling & Electrical delivers reliable installations and trusted AC repairs services.
Contact us today at (313) 277-7630 or email info@mechanicalheating.com for a clear, no-pressure quote.
