AC Installation Slidell &
the Northshore — Built to Last.
Salaried install teams — not subcontractors. 12-year parts & labor warranty. 0% financing for 72 months. Free written estimate before any commitment.
About This Service
MD Air and Heat installs new air conditioning systems throughout Slidell, Louisiana and the surrounding Northshore communities — including Covington, Mandeville, Madisonville, LaCombe, and Pearl River. As an authorized Trane and Mitsubishi dealer, every installation is performed by our own salaried technicians — never subcontractors — and backed by a 10-year labor warranty with up to 12 years of parts-and-labor coverage through our JB Warranty program. Same-day, next-day, and weekend installs are available. Call us at 985-649-5379 for a free written estimate — no commitment required.
Know the Warning Signs
Is Your AC Telling You It’s Done?
In Louisiana, systems run 10 months a year — not 4 like the national average. That shortens real-world lifespan. Here’s what to watch for.
System Is 10+ Years Old
A system that should last 15 years in Minnesota may be effectively done at 10 in Slidell. Louisiana’s heat runs your AC harder and longer than almost anywhere else in the country.
Repairs Are Adding Up
General rule: if the repair costs more than half the price of a new system, replacement wins. Throwing money at an aging compressor rarely buys more than another summer.
Entergy Bills Keep Climbing
Older systems lose efficiency every year. A new high-SEER2 Trane unit can cut cooling costs significantly — often paying for itself faster than you’d expect on a Louisiana utility bill.
Can’t Keep Up in August
If your system runs all day and the house still won’t get below 80° during peak heat, it’s undersized, worn out, or both. A new properly sized system makes a night-and-day difference in comfort.
Uses R-22 Refrigerant
R-22 (Freon) is no longer manufactured. If your system still uses it, every recharge costs more than the last — and the supply will eventually run out. Replacement is the only long-term fix.
Loud, Inconsistent, or Unreliable
Rattling, banging, or a system that short-cycles — turns on and off constantly — points to a unit nearing the end of its usable life. At that stage, reliability only goes one direction.
A system that should last 15 years in Minnesota may be effectively done at 10 in Slidell. Louisiana’s heat runs your AC harder and longer than almost anywhere else in the country.
General rule: if the repair costs more than half the price of a new system, replacement wins. Throwing money at an aging compressor rarely buys more than another summer.
Older systems lose efficiency every year. A new high-SEER2 Trane unit can cut cooling costs significantly — often paying for itself faster than you’d expect on a Louisiana utility bill.
If your system runs all day and the house still won’t get below 80° during peak heat, it’s undersized, worn out, or both. A new properly sized system makes a night-and-day difference.
R-22 (Freon) is no longer manufactured. If your system still uses it, every recharge costs more than the last — and the supply will eventually run out. Replacement is the only long-term fix.
Rattling, banging, or a system that short-cycles points to a unit nearing the end of its usable life. At that stage, reliability only goes one direction.
Recognize any of these? Let’s get you a free written estimate.
📞 Call Now — 985-649-5379Why Northshore Homeowners Choose MD Air for Installation
A New System Is Only as Good
as the Company Installing It.
The brand on the box matters. But the crew putting it in matters more. Here’s what makes an MD Air installation different from day one — and for the next 12 years.
12-Year Parts & Labor Warranty — The Best in the Market
Our installations come with a 10-year labor warranty and up to 12 years of parts-and-labor coverage through our JB Warranty program. If anything fails within that window — parts and labor are covered. No other Northshore HVAC contractor offers this.
Authorized Trane & Mitsubishi Dealer
We’re not just selling any unit we can get. As an authorized Trane and Mitsubishi dealer, our technicians receive factory-level training on the exact equipment they install — meaning proper setup, correct refrigerant charge, and a system that performs the way it was designed to.
Proper Load Calculation — Right Size, Every Time
An oversized system short-cycles and leaves your home humid. An undersized one runs forever and can’t keep up in August. Every MD Air installation starts with a proper Manual J load calculation — so the system we install is actually right for your home.
Salaried Install Crews — No Subcontractors. Ever.
Your installation is performed by MD Air’s own salaried employees — background-checked, NATE-certified, and accountable to us long after the job is done. When a sub installs your system, the warranty claim goes nowhere fast. With us, we own the work start to finish.
0% Financing for 72 Months
A new system is a significant purchase. We offer 0% interest financing for up to 72 months on qualifying installations — so you can get the right system for your home without compromising on efficiency or warranty to hit a lower price point.
Family-Owned Since 1984 — We’re Here After Installation
Big Mike built this company on the idea that you do the job right and stand behind it. Michael and Dustin are in the field every day. If something needs attention after your install, the same family answers the phone — not a corporate call center.
A cheap install costs more in the long run. We size it right, we warrant it longer than anyone else on the Northshore, and our guys are there if anything ever needs attention. That’s the only way we know how to do it.
— MD Air Install Team · Est. 1984
Where We Install
AC Installation Across the Entire Northshore
Based in Slidell. Installing across St. Tammany Parish and beyond. Same-day, next-day, and weekend installs available.
Common Questions
AC Installation Questions.
Straight Answers.
No runaround. If you don’t see your question here, call us and a real person will pick up.
Cost depends on system size, efficiency rating, and the condition of your existing ductwork. MD Air provides a free written estimate before any commitment — so you know the exact number before we schedule anything. We also offer 0% financing for up to 72 months on qualifying installations, which makes a higher-efficiency system accessible without a large upfront payment.
Every qualifying MD Air installation comes with a 10-year labor warranty and up to 12 years of parts-and-labor coverage through our JB Warranty program. That means if a covered component fails within the warranty window, both the part and the labor to fix it are covered — no surprise bills, no fine print runaround. No other Northshore HVAC contractor offers this level of post-installation protection.
We are an authorized Trane and Mitsubishi dealer — meaning factory-level training on the equipment we sell and install. Both brands offer industry-leading reliability and efficiency ratings well-suited to Louisiana’s climate. We’ll recommend the right system for your home’s square footage, duct layout, and budget — not just what’s easiest to sell.
Most standard residential replacements are completed in a single day — typically 4 to 8 hours depending on system complexity and ductwork condition. Our salaried install crews work efficiently and cleanly, and won’t leave until the system is running, tested, and you understand how to operate it. Same-day and next-day installs are available when equipment is in stock.
Never. Every MD Air installation is performed by our own salaried W-2 employees — background-checked and NATE-certified. This matters more on an installation than a repair: improper installation voids manufacturer warranties, causes efficiency loss, and creates problems that show up years later. When our crew installs your system, we own the work — start to finish.
Sizing is calculated using a Manual J load calculation — based on your home’s square footage, ceiling height, insulation, window placement, and sun exposure. An oversized system short-cycles and leaves your home humid. An undersized one runs constantly and can’t keep up in August. We size every system correctly before recommending anything — that’s part of what the free estimate covers.
MD Air has served the Northshore and Southshore of Louisiana since 1984 — over 40 years of continuous local service under the same family name. Big Mike Mehojevich Sr. founded the company. His sons Michael and Dustin run it today. Same phone number. Same family. Same standards.
Still have a question? Call us and a real person picks up — not a voicemail, not a chatbot.
📞 985-649-5379Ready to Get Started
Free Estimate.
Written Quote.
No Pressure.
We’ll assess your home, size the system correctly, and give you a written number — before you commit to anything. Salaried technicians. 12-year warranty. 0% financing available.
Get a Free Estimate
Leave your name and number. A salaried MD Air tech calls you back — usually within the hour.
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Need us faster? Call 985-649-5379 now.
MD Air and Heat — Est. 1984 Big Mike started it. Michael and Dustin run it today. Lisa answers the phone. Forty years on the Northshore — same family, same number, same standards.