Need Energy-Efficient Cooling?

Ductless Mini-Split Air Conditioning

There are many benefits to having a ductless mini-split cooling system that you cannot get with a traditional window A/C unit.  Not only will you benefit from saving energy costs, but you will also have the luxury of being able to control each room’s temperature individually.  These systems feature an outdoor condenser unit that pushes air into the home or business and can be controlled through individual air handlers (wall mounted or recessed into the ceiling) to cool each room separately.

New Construction Plumbing
New construction plumbing


Excellent work and workers! My restaurant had our water heater break down right before the weekend and these guys found a replacement and had it installed the same morning! Fast, friendly and knowledgeable, we couldn’t ask for better. Thank you!

Andrew K., Missoula, MT

Great company with efficient and knowledgeable employees. Highly recommended for both large and small jobs.

Dane S., Missoula, MT

I received excellent service from Sentinel Maintenance, honest and good response for heating repairs. I did research so I knew ahead of time what basic repairs were needed. On short notice staff and service were great! I’d recommend this company!!!!

Lillian L., Missoula, MT

Used this company to finish up my AC unit. GREAT PEOPLE! Made the appointment and THE NEXT DAY they were there! AC unit took a little longer to install than we anticipated however the technician (Steve, possibly?) was great! Thank you for your hard work!

Darci L., Missoula, MT


8:00am – 5:00pm (Mon. – Thu.)
8:00am – 4:00pm (Friday)


(406) 721-5400


8:00am – 5:00pm (Mon-Thu)
8:00am – 4:00pm (Friday)