Rooftop HVAC units are common in commercial buildings. Our team installs and repairs these systems to ensure reliable and efficient operation. We handle all makes and models and provide regular maintenance to prevent downtime.
From fast repairs to full system installations, MJM Heating & Cooling provides expert air conditioning services across New Jersey. Whether it’s a broken unit in the middle of summer or a new energy-efficient system you need, our veteran-owned team delivers fast, reliable, and affordable solutions built for lasting comfort.
“MJM replaced our outdated AC system and we couldn’t be happier. Their crew showed up on time and worked efficiently. We were back to comfort in less than a day.”
“We’ve used MJM for years and they always deliver. For our seasonal tune-up, they were on time, honest, and didn’t try to upsell us on anything unnecessary.”
“We had other companies try to figure out what was wrong, but MJM got it right on the first visit. Their team is knowledgeable and professional.”
“Very responsive and professional service from start to finish. They worked around our schedule and had the AC blowing cold air the same day.”
Have questions about your air conditioner? You're not alone. Our AC FAQs cover everything from system lifespan and maintenance tips to emergency repairs and financing options—so you can make informed decisions and stay cool with confidence.
Installation typically takes 1-3 days depending on unit size.
Regular filter changes and coil cleaning are essential.
Most repairs are done on-site for quick service.
Modern units offer high energy efficiency ratings.
Yes, 24/7 emergency repairs are available.
Yes, financing options through Wisetack.
Our team is here to help—whether it’s routine maintenance, an urgent repair, or a full system install. Contact MJM Heating and Cooling today for fast, friendly, and reliable HVAC service anywhere in New Jersey.
