Ductless Mini-Splits for Homes Without Ductwork

Why ductless suits this housing stock

A large share of homes around Ladysmith were built before central forced air was standard, and were heated with electric baseboards — a resistance element in every room, running at a coefficient of performance of exactly one. Every unit of electricity produces one unit of heat, no more.

A heat pump moves heat rather than making it, which is why the same electricity delivers several times the output. Replacing baseboards is therefore the single largest efficiency gain available in these houses, and that conversion is funded directly by BC Hydro with a rebate of up to $5,000.

Ductless makes it possible without construction. Retrofitting ducts into a finished house means dropped ceilings, boxed chases, and disruption that frequently costs more than the equipment. A multi-head ductless layout reaches the same rooms through a series of small wall penetrations.

How many heads, and where

The instinct is one head per room. That is usually wrong in both directions.

An open main floor with a connected kitchen, dining and living area is often a single zone, and one correctly sized head handles it. Bedrooms behind closed doors down a hallway are the opposite — they receive very little from a head in the hall, and a house that closes bedroom doors at night has to account for that.

Head count also drives cost more than any other variable: a single-zone system starts around $3,500 while a four-head layout reaches into the $15,000 range before rebates. Getting the zoning right is where the money is decided, which is why it follows a room-by-room heat loss calculation rather than a walk-through.

Living with a ductless system

Two things surprise people. The indoor heads are visible — they mount high on a wall, and while modern units are considerably slimmer than older ones, they are not invisible. Placement matters aesthetically as well as thermally.

The second is that ductless systems cool as well as heat. On this coast that has shifted from a luxury to a reason people buy, as summer heat events have become more common than they were when these houses were built.

Maintenance is straightforward and largely owner-handled: the filters in each head pull out and rinse, and doing that on schedule matters more to performance than any annual service call. The outdoor unit needs its coil kept clear, which on a salt-exposed lot means rinsing more often than an inland install would.

How a ductless system goes in

1. 1

   Zone the house — Each indoor head serves a zone. Deciding how many, and where, is a heat loss question per room rather than a room-count question. Open-plan main floors often need fewer heads than expected; bedrooms down a hallway often need more.

2. 2

   Site the outdoor unit — Away from bedroom windows, clear of the drip line, high enough for airflow, and as far from direct salt spray as the lot allows. Line length between outdoor and indoor units is limited, which constrains the options.

3. 3

   Run lines, mount heads — Refrigerant lines, condensate drainage and control wiring run through a small penetration per head. On most houses this is finish work rather than construction.

4. 4

   Electrical, commission, rebate — Circuit permitted and inspected, system commissioned, and the baseboard-conversion rebate filed.

What the job includes

• Single-zone ductless installation

  One outdoor unit and one indoor head, sized to a single zone, for condos, additions and single rooms.

• Multi-zone ductless conversion from baseboards

  Whole-home conversion from electric baseboards using multiple indoor heads, with the BC Hydro rebate filed as part of the job.

Where the coverage area differs

Chemainus and Saltair sit on the same coastal exposure as Ladysmith, so equipment specification carries across. The variable is house age — compact heritage-era homes zone differently from the larger newer builds toward Yellow Point, where head counts run higher.

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