Call to Free: 443-475-8575,
At your service 24 hours a day & 7 days a week

Big or Small is a full service Heating and Air Conditioning and HVAC Repair company that offers same day service and puts a strong emphasis on delighting the customer with quality of work and exceptional customer service.

Emergency Repairs: We offer 24-hour emergency service.

For more information, contact us today.

Our Products

Simple Service

Your Simple Service Membership guarantees appointments and provides valuable services and discounts on repairs. Regular service of your equipment can save you thousands of dollars over the long haul in energy costs. In fact, as much as 30 percent per year! Regular service can also extend the life of your system. Your membership will pay for itself year after year. You can expect our highly trained and competent technicians to become completely familiar with you and your equipment. Membership is also transferable to the buyer of your current home.

Membership is required for a period of one year, and will automatically renew on a monthly basis afterwards. You may discontinue membership at any time after one year upon sixty (60) days written notification.

Spring A/C 21-Point 
Precision Tune-Up
Winter Furnace 21–Point 
Precision Tune-Up
  • Check Voltages
  • Check Air Temperature Across Evaporator Coil
  • Check Refrigerant Charge
  • Check Superheat
  • Lubricate any Moving Parts
  • Check Evaporator Condition
  • Check Condensor Coil Condition
  • Check Filter
  • Check and Adjust Thermostat
  • Check All Wiring and Connections
  • Check Condensor Temperature Rise
  • Check Starting Contactor
  • Check All Capacitors Microfared (MFD)
  • Measure All Motor Amperages
  • Check Operation of Unit Safety Controls
  • Check Fan Blade for Cracks
  • Check Condensate Drain or Pump
  • Turn Exposed Dampers to Cooling (No Balancing)
  • Check Fuse Disconnect
  • Wax Top of Unit
  • Check and Adjust Thermostat
  • Check and Adjust Safety Controls
  • Clean Burners and Controls
  • Clean and Adjust Pilot Assembly
  • Check All Wiring and Connections
  • Check for Gas Leaks at Furnace
  • Lubricate All Moving Parts
  • Clean Flame Sensors
  • Check Condition of Filters
  • Check Condition of Flue Pipe and Draft Diverter
  • Check Fan Control
  • Adjust Pressure Regulator
  • Check Furnace for Carbon Monoxide
  • Check Complete Furnace Cycle
  • Make Any Necessary Recommendations
  • Measure Oxygen Level
  • Measure Carbon Dioxide Level
  • Check the Draft (Flue Gasses Discharged from the Furnace)
  • Check Temperature of the Stack (Flue Gasses)
  • Check Temperature of Air Coming Out of Vents
  • Check Efficiency Level (Can Adjust to Increase Efficiency)

Heating and Air Condition Repair, Baltimore Maryland, Heating, A/C, Air Conditioner