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Ductless systems

Mini-split service and planning

Mini-splits can solve room-by-room problems, but head placement, condensate routing, line-set installation, controls, and low-load behavior determine whether the result is quiet and comfortable.

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Start here

When the details need attention

  • One indoor head cools while another does not.
  • Water appears at an indoor unit or condensate route.
  • A room reaches temperature but still feels humid.
  • Noise, odor, airflow, or remote-control behavior changed.
  • A proposed layout needs room loads and head placement checked.

The approach

Follow the zone and the installation

  1. 01

    Document which indoor and outdoor units are connected and which mode each zone requests.

  2. 02

    Check filters, coils, drainage, controls, error information, and accessible installation conditions.

  3. 03

    Separate an equipment fault from placement, load, or condensate design.

  4. 04

    For new work, write down room loads, equipment combinations, line routes, drains, power, controls, and service access.

How a ductless mini-split is laid out One outdoor unit connected by refrigerant line sets to indoor head units mounted on a wall or ceiling in different rooms. Each head cools its own zone, with no ductwork needed. Indoor head units Mounted on a wall or ceiling Each head cools its own zone Refrigerant line sets Outdoor unit No ductwork needed

A mini-split skips the ducts. Refrigerant line sets connect one outdoor unit to wall- or ceiling-mounted heads, and each head cools only the zone it serves.

Sources: ENERGY STAR — Ductless Heating & Cooling, accessed 2026-10-16; U.S. DOE — Energy Saver 101, Home Cooling infographic, accessed 2026-10-16

What to expect

A zone-specific answer

  • 01

    Exact equipment match

    Multi-zone combinations must be supported by manufacturer data.

  • 02

    Drainage is designed

    Condensate routing and maintenance access are part of the installation.

  • 03

    No square-foot shortcut

    Each room and exposure affects selection and placement.

Sources and standards

The approach has a paper trail.

Read before you book

Use the answer that matches the question.

Scheduled service

Tell Frog what is going on.

Share the basics. Do not include payment information or a full street address. This request is for scheduled residential service, not emergency dispatch.