Mini-Split Ductless Heat Pumps from O'Brien Heating & Air Conditioning Help you Manage Warm Summers and Cold Winters in the Main Line

Whether you need comfort boost in one room, or up to four different rooms, O'Brien Heating & Air Conditioning in the Main Line has a mini-split heat pump to meet your needs. Our mini-split heat pumps from Lennox® provide suberbly efficient and super quiet performance for many years.

Their ductless design eliminates the possibility of confusing installation problems or expensive modifications in the future. What’s more, their efficient, all-in-one heating and cooling system keeps your home comfortable season after season. Find out more about our mini-split heat pump offering.

MS8Z Mini-Split Heat Pump

When you need to heat and/or cool more than just one room, the MS8Z is the unit that will do the job. With a single outdoor unit, this multi-zone, mini-split heat pump efficiently handles comfort issues in as many as four different rooms.

  • Efficiency ratings of up to 16 SEER* and 8.20 HSPF** boost your comfort without raising your utility bills
  • All-in-one heating and cooling gives you efficient comfort all year long
  • Multi-Zone design operates from a single outdoor unit with one to four compact indoor units for ultimate comfort control
  • Inverter technology nearly silently provides only the air that is called for
  • Secure installation doesn’t leave you open to home safety issues associated with window units
  • Indoor sound levels of 32 dB and outdoor levels as low as 56 dB (a whisper is 20dB and light rainfall is 30dB)
  • Easy-to-use remote control senses air temperature in the room and automatically tells the system to make necessary adjustments
  • Ductless design eliminates complicated installation or expensive modifications
  • Compact design blends into any room
  • 5-year limited warranty on covered components
MS8Z Mini-Split Heat Pump
Efficiency Rating (SEER): up to 16
HSPF Rating: up to 8.2
Sound Rating: 32

MS8H Mini-Split Heat Pump

If you need an HVAC for only one room, the MS8H is a sturdy and efficient option. It’s ENERGY STAR® qualified and gives you efficient comfort all year long.

  • Efficiency ratings of up to 22 SEER* and 10.20 HSPF** help you stay comfortable while helping you spend less on energy bills
  • All-in-one heating and cooling delivers efficient comfort throughout the year
  • Inverter technology delivers only the air that is needed
  • Secure installation leaves you less vulnerable to problems associated with window units, like insects, weather and possibly even theft
  • Ductless design eliminates the need for a complicated installation or pricey modifications
  • Compact design fades into the background of any room
  • Indoor sound levels of 26 dB and outdoor levels as low as 50 dB (a whisper is 20dB and light rainfall is 30dB)
  • Easy-to-use remote control
  • 5-year limited warranty on covered components
MS8H Mini-Split Heat Pump
Efficiency Rating (SEER): up to 22
HSPF Rating: up to 10.2
Sound Rating: 26

MPA Mini-Split Heat Pump

The MPA ductless heat pump is ENERGY STAR-qualified with energy-efficiency ratings up to 23.50 SEER* and 10.50 HSPF**. 

  • Wall-mounted thermostat or wireless remote control measures the air temperature in the room and automatically signals the system to adjust heating or cooling.
  • Quiet indoor sound levels as low as 29 dB and outdoor levels as low as 51 dB (a whisper is 20 decibels and light rainfall is 30 dB).
  • Advanced inverter technology keeps heated or cooled air streaming without the typical stops and starts related to conventional systems.
  • Keeps your home secure and allows the system to rapidly and efficiently move heat out of your home because the compact indoor and outdoor units are joined through a small hole in your wall.
  • Designed for easy installation.
  • Circulates cleaner air throughout your home because of the lack of ductwork, giving you added peace of mind.
  • 5-Year Limited Warranty on parts.
  • 7-year Limited Warranty on the compressor.
MS8Z Mini-Split Heat Pump
Efficiency Rating (SEER): up to 23.5
HSPF Rating: up to 10.5
Sound Rating: 29

If you want service for your mini-split heat pump or need a new unit, O'Brien Heating & Air Conditioning in the Main Line is ready to serve you. Call us at 610-626-2540 or schedule an appointment with us using our online scheduler.


* SEER, or Seasonal Energy Efficiency Ratio, measures the cooling efficiency of your air conditioner or heat pump. A higher SEER rating means greater energy efficiency and more savings for you and the environment.

** HSPF, or Heating Seasonal Performance Factor, measures the heating efficiency of your heat pump. A higher HSPF rating means greater energy efficiency, more savings and is better for the environment.