Residential Plumbing & HVAC services

As a company, we strive to deliver an experience that makes you confident in the decision to work with A.G. O’Brien to handle your HVAC and plumbing needs. To ensure you are being heard. That you are being guided through a project instead of being talked at or sold something. To have your concerns arrested & your faith restored that your heating, cooling, ventilation, plumbing, and fire sprinkler systems are in good hands. We aspire to be competitive and competent and to instill confidence in our customers.

Plumbing Services

  • Home Remodel
  • New Home Construction
  • Water heater repair & replacement
  • Tankless water heater repair & replacement
  • Faucet, shower, tub, toilet leaks & repair & replacement
  • RPZ testing, repair & replacement
  • Water Pipe repair & replacement
  • Waste Pipe repair & replacement
  • Water treatment services
  • Water filtration services
  • Sump pump install/repair/replace
  • Waste/grinder pump install/repair/replace
  • Booster pump install/repair/replace
  • Drain maintenance – snake/clog/removal

HVAC Services

  • Home heating
  • Home Cooling
  • Ventilation
  • Home Remodel
  • New Home Construction
  • Heating/Cooling unit repair
  • Heating/Cooling unit service/tune-up
  • Heating/Cooling unit replacement
  • Boiler repair, maintenance, & installation
  • Furnace repair, maintenance, & installation
  • Ductless mini splits for heating or cooling
  • Central heating
  • Central air conditioning
  • Humidification control
  • Air exchanger repair, maintenance, & installation
  • Exhaust fan installation & maintenance
  • Kitchen hood installation & maintenance
  • Steam equipment/system service

(We can service all brands/makes and models)


Office (218) 729-9662
[email protected]

Service Locations

Saint Louis County

Douglas County

Carlton County

Pine County

Itasca County

Cook County

Bayfield County