Service & Repair All-Star Mechanical Services provides!

4HP18LT Two Stage Heat Pumps

Because it’s a two-stage heat pump' the 4HP18 has the ability to keep you comfortable by controlling temperature and indoor humidity levels. Most of the time' the 4HP18 will heat or cool your home using its lowest' quietest' most energy conscious setting. However' when heating or cooling demands increase' it can switch to its higher setting for greater temperature control in extreme conditions.

  • Up to 18 SEER and 9.2 HSPF ratings
  • Two-stage compressor runs at a lower speed most of the time to keep you comfortable all year long' while reducing energy costs' humidity and sound levels
  • Dual-Fuel system offers an ideal combination of energy sources' electric and gas' pairing a heat pump and matching gas furnace together to maintain comfort
  • Quiet Shift™ technology reduces operating sounds when the unit goes into defrost mode to remove frost and ice buildup' so you get better performance with minimal noise and less maintenance
  • Heavy-duty compressor sound blanket lowers operating noise' so you can enjoy peace and quiet
  • Rigorous run-testing of each unit in our factory helps ensure the most reliable performance in your home
  • Comfort Alert 2™ diagnostics displaying up to nine fault codes is factory installed
  • Variable speed condenser fan motor with swept-wing fan blade
MODELCooling Cap. MBtuHSEERHeating Cap.MBtuHHSPFRefrigerant Charge Oz.Line SizeDimensions HxWxDWeight Lbs.
4HP18LT24P-224.0 17.0 33.0 9.0 300 3/8-7/8 44x37.7x35.7 341
4HP18LT36P-135.0 17.0 24.6 9.0 283 3/8-7/8 44x37.7x35.7 338
4HP18LT48P-247.0 16.0 45.0 9.0 262 3/8-7/8 44x37.7x35.7 338
4HP18LT60P-156.0 15.0 55.0 9.0 274 3/8-7/8 44x37.7x35.7 361

Warranty Information

  • All Parts for 120 months -

Available Documents