
Expert. Knowledgeable. Experienced.
If you own a business, commercial property, restaurant, or have responsibility for a church, choosing the right mechanical contractor can positively impact your bottom line. Energy costs soar with improperly designed and installed equipment. We use innovative design and technology to save energy and reduce operational and maintenance costs. And we provide expert service at an affordable price.
AJ Michaels can engineer and redesign your heating, cooling and HVAC systems and save your business up to 75% of your energy costs. We can repair your complicated HVAC equipment or install a steam boiler for food processing or heating. We can even install the latest high-tech boiler systems in many places others can’t, such as ships!

The A.J. Michaels Advantage
- Local, independent and family-owned
- Serving the Baltimore-Annapolis area since 1978.
- We do not use subcontractors.
- We’ll never charge extra if your system needs service. Nights, weekends and holidays, it’s all the same to us – and our work is always guaranteed.
NOTCH
We look at your immediate needs to see what steps we can take now to save you time, money or effort in the future. Maybe there’s a problem waiting to happen that can be solved before it occurs. Often we can take steps to ensure problems don’t recur. Our commercial services include:
- Gas, oil, and electric heating systems, water heaters and boilers, rooftop systems, air handlers installed, replaced, repaired and maintained
- Heat pumps and air conditioners installed, replaced, repaired and maintained
- HVAC systems designed, repaired, maintained and retrofitted
- High-efficiency boilers & commercial modular application
- Chilled water & water-sourced heat pump systems
- Low & high pressure steam for heating & food processing
- Critical air balancing for distribution & combustion
- ADA-compliant equipment installed, repaired and updated
- Pipes and drains unclogged using jet blasting
- Sinks and toilets replaced and repaired
- Sump pumps, garbage disposals and backflow valves installed, replaced and repaired
- Radiant floor heating installed and repaired
- Commercial Service Agreements





