Expert Ductless Mini-Splits

Mini-splits are an ideal fit for room additions, ADUs, and Monrovia homes without existing ductwork. We install and service ductless systems that deliver targeted, zone-by-zone heating and cooling with minimal energy waste.

When a Mini-Split Is the Right Solution

  • Room Additions: Any addition that was built without extending the ductwork is a natural candidate for a dedicated ductless zone.
  • Converted Garages & ADUs: Monrovia's ADU boom has created huge demand for efficient single-room systems that can be independently metered.
  • Hot Upstairs Bedrooms: A supplemental ductless unit in a chronically hot bedroom solves the problem without re-engineering your entire duct system.
  • Home Offices: A ductless unit lets you keep one room at a different temperature without conditioning the rest of the house — particularly useful with remote work.
  • No-Duct Craftsman Homes: Original craftsman-era homes with no ductwork can be served by a multi-zone ductless system with multiple indoor air handlers from one outdoor unit.

Single-Zone and Multi-Zone Mini-Split Installations

We install and service all major ductless brands including Mitsubishi, Daikin, Fujitsu, Carrier, and LG. A single-zone system pairs one outdoor compressor with one indoor air handler. A multi-zone system uses one larger outdoor unit powering up to five independent indoor air handlers — each controlled separately. We help you choose the configuration that makes sense for your Monrovia home's layout and your comfort goals.

How We Install Ductless Systems in Monrovia

Mini-split installation is faster and less invasive than a full central system:

  • 1. Room Load Calculation: We calculate the BTU requirement for your specific space — its sun exposure, insulation, and ceiling height all factor in.
  • 2. Air Handler Placement: We advise on the optimal wall location for maximum airflow distribution and aesthetic appeal.
  • 3. Line Set Routing: Refrigerant lines are routed through a 3-inch penetration in the exterior wall, covered with a color-matched line set cover.
  • 4. Outdoor Unit Mounting: The compressor is mounted on a new concrete pad or heavy-duty wall bracket, positioned for noise minimization and airflow.
  • 5. System Commissioning: We leak-test the line set, pull a vacuum, verify refrigerant charge, and demonstrate the remote control operation.

Why Choose Monrovia HVAC?

We carry ductless systems in stock for the most common single-zone applications, meaning we can often install your system the same week you call. No long lead times.

Call us today at (626) 423-6510 to schedule your service.