Service Requests

Ductless AC Installation in Markham

Request ductless ac installation for a property in Markham. Include the equipment, the problem or planned work, and your location so the request can be reviewed.

Ductless AC Installation

Which rooms need cooling, and are you planning a new ductless system or replacing existing equipment?

A ductless cooling project begins with the rooms to be served, the building layout, and the intended zoning, not simply a choice of equipment. Indoor-head placement affects air distribution, while the route for refrigerant lines, condensate drainage, and electrical connections shapes installation scope. If an existing mini-split is being replaced, its condition and the suitability of existing penetrations or lines must be assessed before reuse. The selected system should match the documented project requirements and manufacturer specifications.

Assessment should record the rooms and zones, existing equipment if present, proposed head locations, and possible routes for line sets, drainage, and electrical connections. These observations affect equipment selection, installation access, and whether existing openings or lines can be reused. Reuse depends on condition, compatibility, and applicable installation requirements, not convenience alone.

  • Ductless equipment selection and zoning
  • Indoor-head placement and line routing
  • Existing-system replacement and commissioning
Hand opening the cover of a wall-mounted ductless air conditioner

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Assessment and Scope

Questions for the Proposed Work

01

Plan indoor-head locations around the rooms

Room layout, wall construction, and the intended zones help determine how many indoor heads are needed and where they can be placed. A head should not be selected by room count alone; the project assessment must consider the equipment design and the spaces it is intended to serve. Placement also affects line routing, drainage, access for future service, and how air reaches the occupied part of each room.

02

Check line routes and existing openings

A ductless installation requires a route between indoor and outdoor equipment for refrigerant lines, wiring, and condensate drainage. Where an existing opening is being reused, its location, condition, and suitability for the selected equipment need confirmation. Existing refrigerant lines should not be presumed reusable; compatibility and condition affect scope. Refrigerant-circuit work and electrical connections must follow the equipment instructions and applicable requirements.

03

Commission the system and define replacement scope

Installation scope should identify the equipment, mounting locations, line-set route, drainage, electrical coordination, and commissioning checks. On a replacement project, compare the existing system's fault history and condition with the proposed equipment before deciding whether repair remains reasonable. Commissioning verifies that the installed system operates according to its specifications; it is distinct from the construction and connection work that makes the installation possible.

Compare the next step

Explain whether the lower level needs cooling, heating, or independent control, and identify any existing moisture concern. Ask how the selected location handles air distribution and condensate removal. Compare a room system with central distribution changes using the same intended basement use and maintenance access.

Before You Submit

Equipment Observations to Record

  • Room dimensions and intended use
  • Windows and insulation information
  • Rooms that must work with doors closed
  • Possible indoor and outdoor locations
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Keep the assessment safe

A room area alone is not a complete sizing method. Require a design and installation assessment before ordering equipment or making wall penetrations.

Further Guidance

Background for the Equipment Decision

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