Cooling / Air Conditioning

  • What this is: how residential cooling systems work (central AC, heat-pump cooling, ductless mini-split, and portable/window units), how to maintain them, and when to call a pro — for any BC home including strata units. Covers the post-2021 heat-dome life-safety framing for Metro Vancouver.
  • Not: the heating side of a heat pump (see heating-system (Home Systems)); thermostats (see thermostat (Home Systems)); filters (see hvac-filters (Home Systems)); condensate drain management (see condensate-drain (Home Systems)).
  • Figures: 2025–26 Metro Vancouver estimates — get your own quotes.

Bottom line

The rule (tripwire)

  • If you see ice on the indoor coil or refrigerant lines, hear hissing, or notice the system blowing warm air → shut the unit off and call an HVAC tech. These are refrigerant-side failures; running through them damages the compressor.
  • Refrigerant work is a certified-tech job in BC. A Refrigeration and Air Conditioning Mechanic (TQ ticket) must handle any refrigerant charge, leak repair, or new installation. You cannot legally add refrigerant yourself.1
  • If you’re in a strata and want to install any cooling system that touches the exterior (mini-split outdoor unit, window unit, penetration through building envelope) → get written strata council approval first, even if you’ve seen neighbours do it. Window and portable units are commonly restricted by bylaw. A Human Rights Code medical need can override a bylaw refusal — but you still need to go through the process.23

Recurring upkeep

  • Change or clean the air filter every 1–3 months during cooling season (more often if pets or renovations). A dirty filter is the most common cause of reduced airflow and frozen coils.
  • Rinse the outdoor condenser coil once a year (spring, before cooling season) — clears debris and lets the system reject heat efficiently.
  • Flush the condensate drain line annually with a cup of white vinegar — prevents algae clogs that cause water overflow and indoor damage. → condensate-drain (Home Systems)
  • Schedule a professional tune-up once a year, ideally April–May before summer. Includes refrigerant check, electrical checks, coil cleaning, and condensate pan inspection.

One-time setup

  • Confirm your strata bylaws before buying any AC equipment. Window and portable units are frequently prohibited or restricted; outdoor units require written council approval. Check bylaws first, not after purchase.
  • Find and vet an HVAC contractor before you need one. Summer emergencies during a heat wave have 5–10 day waits. → vendor-roster (Home Systems)

Standing facts

  • Metro Vancouver historically had little need for AC — that changed with the 2021 heat dome. 619 people died; 98% of deaths occurred indoors; only 34% of BC homes had any AC at the time.45 A heat pump providing at least one cooled room is now a genuine health-safety measure for elderly residents and people with chronic illness, not a luxury.
  • A heat pump is both heater and cooler. For most Metro Vancouver homes replacing electric baseboard heat, a heat pump is the most cost-effective path to adding cooling — and BC Hydro rebates (up to $4,000) partially offset the cost.6

How it works — the one thing that matters

All cooling systems use the same refrigerant cycle: a refrigerant fluid absorbs heat indoors (at the evaporator coil) and dumps it outdoors (at the condenser coil). The cycle is driven by a compressor that pressurises the refrigerant, raising its temperature so it can shed heat outside even when it’s hot outdoors.

The single load-bearing idea: cooling moves heat — it doesn’t create cold. The indoor unit absorbs heat from your room air, and the outdoor unit releases that heat outside. The efficiency of that transfer depends entirely on two things:

  • Clean coils (fouled coils can’t transfer heat — the system runs harder and achieves less)
  • Correct refrigerant charge (too little refrigerant means the evaporator runs too cold → ice forms → airflow blocks → the compressor overheats)

So what: owner maintenance (filters, coil rinse, condensate drain) keeps the heat-transfer surfaces clean. Everything else — refrigerant level, leak detection, electrical checks, compressor — is a tech job. The line between them is clear.

System types and how they differ:

  • Central AC — a split system: an outdoor condenser/compressor unit and an indoor air handler connected to your existing ductwork. Cools the whole home through the duct network. Requires existing or new ducts; installation involves refrigerant line sets and electrical work.
  • Heat pump (cooling mode) — mechanically identical to central AC but the refrigerant cycle reverses: it heats in winter and cools in summer. The dual-purpose path. Ductless (mini-split) or ducted.
  • Ductless mini-split — one or more indoor “heads” mounted on walls, each connected to an outdoor unit by a small refrigerant line set through a 3-inch wall penetration. No ductwork needed. Each zone is independent; very efficient. The most practical new-install option for strata units (if approved) and older homes without ducts.
  • Portable AC — self-contained unit inside the room; hot air exhausted through a flexible hose out a window. No permanent installation; low efficiency. Often the only option permitted in strata buildings that restrict window units or exterior penetrations. Strata bylaws commonly restrict even these if the hose hangs from the window.2
  • Window AC — sits in an opened window; cools one room. Cheap to buy; frequently prohibited in strata bylaws over aesthetics and building-envelope concerns.2

SEER / efficiency: SEER2 (Seasonal Energy Efficiency Ratio, the current standard) measures cooling output (BTU) per watt-hour consumed over a season — think “miles per gallon” for cooling. Higher SEER2 = lower operating cost; minimum federally required is SEER2 14.3; rebate-eligible systems in BC typically require SEER2 16+.7

What goes wrong, and the warning signs

Watch forWhat it means
Warm air from vents (system running but not cooling)Low refrigerant, dirty coil, failed compressor, or wrong thermostat setting
Ice on the indoor coil or refrigerant linesLow refrigerant or blocked airflow (clogged filter) — shut off the system; running through ice destroys the compressor
Hissing or bubbling sound near the unitRefrigerant leak — call a tech; refrigerant is harmful to breathe in quantity
Oily residue on refrigerant lines or fittingsRefrigerant leak (refrigerant carries compressor oil when it escapes)
Water pooling near the indoor unit or in the air handlerCondensate drain clogged — see condensate-drain (Home Systems)
Musty or mouldy smell from ventsAlgae/mould growth in condensate pan or drain — flush the drain line
Loud grinding, banging, or rattlingFailing fan motor, loose component, or compressor failure — stop the unit
High energy bills with no change in usageSystem is working harder than it should — dirty coil, low refrigerant, or failing compressor
System short-cycling (turns on and off quickly)Oversized unit, refrigerant issue, or electrical fault
Outdoor unit not running when inside unit isCapacitor, contactor, or compressor failure

What actually fails (the load-bearing failures):

  • Compressor failure — the single most expensive failure (replacing a compressor approaches or exceeds replacement cost for the whole outdoor unit). Often caused by running the system with low refrigerant or ice on the coil.
  • Refrigerant leak — slow leaks degrade efficiency over months; rapid leaks cause immediate ice and compressor damage. All refrigerant work requires a certified tech.1
  • Clogged condensate drain — the most common owner-preventable failure. Algae plug the drain line; water backs up into the air handler or drips into the ceiling. Annual vinegar flush prevents it. → condensate-drain (Home Systems)
  • Dirty condenser coil — the outdoor unit can’t shed heat; the system runs at higher pressure, stressing the compressor. Annual rinse with a garden hose prevents it.
  • Capacitor failure — the start capacitor helps the compressor and fan motors start. It’s a common, inexpensive repair (≈300) — but requires a tech because capacitors hold a lethal charge even when power is off.

When to replace vs repair

What you seeDo this
Compressor failed, unit >10 years oldReplace — compressor cost approaches replacement; an aging unit will fail again
Refrigerant leak, unit <8 years oldRepair — find and fix the leak, recharge; worth it on a newer unit
Refrigerant leak, unit >12 years oldReplace — leak repair + charge + aging parts = poor value; put money toward new
Multiple simultaneous failures (compressor + coil + leak)Replace — the “ship of Theseus” point; net new is cheaper
Capacitor, contactor, fan motor onlyRepair — inexpensive, high-value fix on any age unit
System undersized for actual load (never keeps up on hot days)Replace / right-size — no repair fixes a sizing problem
System is R-22 refrigerant (phased out)Replace — R-22 is no longer manufactured; repair requires recycled stock and is expensive
Unit <8 years, single repairable failureRepair — standard playbook; any repair quote >50% of replacement cost on an old unit → replace instead

Verdict — reversibility × cost: a full AC or heat-pump replacement is irreversible (you cannot un-replace it) and costs 15,000+ depending on system type, which crosses both thresholds (irreversible + >500 — just do it and log it.

Heat Pumps Are the Dual-Purpose Cooling Path in Metro Vancouver (Home Systems)

Typical cost (BC / Metro Vancouver)

TierWhat’s includedRangeSources
DIY / parts onlyPortable AC or window unit only (no installation); owner installsPortable: 700 · Window unit: 900 (by BTU)89indicative (limited sources)
BasicLike-for-like replacement of outdoor + indoor unit (same system type, same capacity); licensed contractor, no permit if <5kW residential; haul-away not confirmedCentral AC: 6,500 · Single-zone mini-split: 5,00010711
StandardNew system install with permits, electrical work, refrigerant lines, condensate drain hookup, thermostat, haul-away of old equipment; correct sizing; full licensed installCentral AC (existing ducts): 9,000 · Single-zone mini-split: 6,000 · Multi-zone mini-split (2–3 zones): 12,000 · Heat pump (ducted): 13,0001071112
Premium / upgradeMulti-zone mini-split (4+ zones): 18,000+ · High-efficiency variable-speed ducted heat pump: 15,000 · Includes electrical panel upgrade where needed; before any applicable rebates18,000+101112

Metro Vancouver runs approximately 10–18% above the rest of BC due to labour market tightness and the frequency of electrical panel upgrades in older homes.7 Permits for HVAC/electrical work in the City of Vancouver run 350.7 Get 2–3 written quotes — a quote far below Standard scope for the same job is a flag that permits, electrical, or condensate work may not be included.

Available rebates (confirm current status at time of install): BC Hydro up to 5,000 for gas-home dual-fuel heat pump; CleanBC income-qualified up to $16,000. Rebates apply to heat pumps only, not standalone AC. Stacking multiple programs can meaningfully cut Standard-tier net cost.6 CleanBC gas-to-heat-pump rebate ended April 2025 — verify current availability.

DIY/portable tier: strata bylaws may prohibit portable units with exterior-vented hoses — confirm before purchasing.

How to maintain it — the procedures

Refrigerant, electrical panel work, and full coil disassembly are always pro-only. Owner procedures cover filters, external rinse, and condensate drain.


Procedure: Clean or replace the air filter — every 1–3 months

Why: a clogged filter starves the system of airflow → the evaporator coil over-cools → ice forms → the coil blocks completely → the compressor overheats. Filter neglect is the most common cause of service calls.

You’ll need: replacement filter (check your unit’s size — written on the existing filter’s cardboard frame) or a washable filter + bucket of water; 5 minutes.

  1. Turn the thermostat to OFF (not just “cool” — the fan should stop).
  2. Locate the filter — usually in the return air grille on the wall/ceiling, or in the air handler itself.
  3. Slide the old filter out. Note the airflow arrow direction — the replacement must face the same way.
  4. If disposable: insert the new filter with the arrow pointing toward the air handler (toward the fan, away from the return air duct). Dispose of the old filter sealed in a bag.
  5. If washable: rinse under a garden hose until the water runs clear. Let it dry completely before reinstalling — a wet filter encourages mould.
  6. Write the date on the filter’s cardboard edge.

Done when: filter is seated flush with no gaps around the edges (gaps bypass the filter entirely).

Stop and call a pro if: the filter is wet and the air handler has water staining around it — the condensate drain is likely clogged (see condensate-drain (Home Systems)).


Procedure: Rinse the outdoor condenser coil — annually (spring)

Why: leaves, cottonwood fluff, and debris pack into the condenser fins and insulate them. The outdoor unit cannot shed heat; the system runs at higher pressure. A garden hose rinse once a year is the full owner task.

You’ll need: garden hose with a gentle spray nozzle; 15–20 minutes.

  1. MUST turn off the AC at the thermostat AND shut off the outdoor unit’s disconnect switch (a small box on the wall beside the unit — pull out the cartridge or flip the switch).
  2. Remove any leaves or debris from the top of the unit by hand.
  3. Gently spray the coil fins with a garden hose from the inside out (spray from inside the unit’s cabinet outward through the fins) — this pushes debris out rather than packing it in. If you can only reach the outside, spray straight in at low pressure.
  4. Do NOT use a pressure washer — the thin aluminium fins bend easily and reduce airflow.
  5. Let the unit drain and dry for 15–20 minutes before restoring power.
  6. Restore the disconnect switch, then set the thermostat back to cool.

Done when: fins look clean, no matted debris visible through the grille.

Stop and call a pro if:

  • The fins are bent and visibly crushed (reduces efficiency — a tech can straighten them with a fin comb)
  • You see oily residue or unusual discolouration on the refrigerant lines or fittings
  • The unit makes abnormal noise when you restart it

Procedure: Flush the condensate drain line — annually

Why: the evaporator coil pulls humidity from room air; that water drains through a PVC line. Algae and mould grow in the line and plug it. A plugged drain floods the air handler and the ceiling or floor below it.

You’ll need: cup of white distilled vinegar (or diluted bleach — 1:16 ratio); a wet-dry vacuum (optional); 10 minutes.

See the full procedure in → condensate-drain (Home Systems).

Done when: water flows freely out of the drain line’s outdoor termination point (or into the floor drain).

Stop and call a pro if: the condensate pan already has standing water or the air handler has water stains — the blockage may be in the drain pan itself, or there’s a secondary drain failure.


Procedure: Annual professional tune-up — every spring (April–May)

Why: a licensed HVAC tech checks refrigerant pressure and charge, cleans the evaporator coil (not owner-accessible in most installations), tests capacitors and contactors, checks electrical connections, verifies condensate drainage, and confirms the system is operating within spec. This is also the only way to detect a slow refrigerant leak before it becomes a compressor-killing emergency.

You’ll need: a booked appointment; 250.13

For this task, the procedure is: book a licensed HVAC tech (Refrigeration and Air Conditioning Mechanic — TQ ticket) before April. Beat the summer rush. Tell them the system type, age, and refrigerant type if known.

Ask the tech to confirm:

  • Refrigerant pressure is within manufacturer spec
  • No refrigerant leak detected
  • Capacitors within spec
  • Condensate drain flowing freely
  • Evaporator and condenser coils clean

Stop and call a pro immediately (don’t wait for the annual visit) if:

  • Ice appears on any refrigerant line or the indoor coil
  • You hear hissing or bubbling near the unit
  • The system is running continuously without achieving the set temperature
  • You smell something burning from the air handler

Maintenance calendar:

  • Monthly (cooling season): visual check — is the outdoor unit clear of debris, vegetation, and obstructions? Keep a 60 cm clearance on all sides.
  • Every 1–3 months: check and replace or wash the air filter.
  • Annually (spring — April or May): rinse the outdoor condenser coil; flush the condensate drain line; book the professional tune-up.
  • At move-in or post-install: confirm the condensate drain terminates somewhere safe (floor drain, exterior); confirm the system is correctly sized for your space; confirm the system’s age and refrigerant type (R-22 = plan replacement).

Strata reality

In-unit system is yours; building envelope is common property.

In a BC strata, a cooling system installed within your unit (mini-split indoor head, portable AC, window unit) is part of your strata lot — you pay to maintain, repair, and replace it. The outdoor component, any penetration through an exterior wall or balcony slab, and any structural modification are a different matter.142

What typically requires strata council approval:

  • Installing any outdoor unit (mini-split compressor) — penetrates or sits on limited common property (balcony/exterior wall)
  • Running refrigerant and electrical lines through common areas
  • Installing a window AC unit — many strata bylaws prohibit them outright over aesthetics and building-envelope concerns
  • Even portable AC hoses vented out a window may be restricted if the hose “hangs” from the window frame2

The approval process:

  • Submit a written alteration request to the strata council before purchasing equipment
  • Include: equipment make/model, sound levels (dB), dimensions, proposed location of indoor and outdoor units, line routing, contractor licence and insurance details3
  • Approval can take weeks to months; a significant change to building appearance may require a ¾-vote resolution at a general meeting (SPA s. 71)14
  • Strata council decisions must not be “significantly unfair” (SPA s. 16415)

Human Rights Code override: A strata bylaw prohibiting AC can be overridden by the Human Rights Code s. 8 when cooling is medically necessary (elderly resident, chronic illness, disability). The strata must accommodate to the point of undue hardship — this is not automatic; it requires a formal accommodation request and documentation of medical need.23 Post-heat-dome case law (e.g. Macario v. Strata Plan BCS1296) supports this.2Strata AC Bylaws Can Be Overridden by Human Rights Code Medical Accommodation (Home Systems)

BC public health guidance: Following the 2021 heat dome, Fraser Health and BC health authorities have encouraged stratas to remove or relax cooling restrictions, particularly for vulnerable residents. Strata managers are increasingly aware of liability exposure from strict blanket bans.

SPA references:

  • SPA s. 71 — significant change to appearance requires ¾-vote resolution
  • SPA s. 72 — strata corporation maintains common property
  • Standard Bylaw 2 — owner maintains their strata lot
  • Standard Bylaw 5 — owner requires approval for changes to strata lot that affect another lot or common property
  • Standard Bylaw 8 — owner requires strata council approval for alterations to common property or limited common property

Flood/water damage note: a blocked condensate drain that overflows the pan can damage the unit below. Under SPA s. 158 and the strata’s bylaws, this may trigger a deductible chargeback against you — the same risk as a leaking water heater or supply line. Keep the condensate drain clear. → condensate-drain (Home Systems)

When you hire someone

Ask:

  • Are you a licensed Refrigeration and Air Conditioning Mechanic (TQ ticket / Journeyman Refrigeration Mechanic in BC)?1
  • Will you pull any required TSBC or municipal permits?
  • What refrigerant type does this system use? (R-22 = end-of-life; R-410A or R-32 = current)
  • Is the system correctly sized for my space? (Ask them to do or confirm a Manual J load calculation — don’t let them guess)
  • What’s included in the quote — condensate hookup, electrical, thermostat, haul-away of old equipment?
  • For strata installs: are you familiar with strata approval processes and can you provide documentation for my application?
  • What warranty do you offer on parts and labour?

Verify the work:

  • Any required permit issued and inspection passed
  • System cools to set temperature within a reasonable time
  • No refrigerant odour or hissing after install
  • Condensate drain flows freely and terminates safely
  • No ice forming on refrigerant lines or indoor coil within the first few operating hours
  • All electrical connections are covered and the disconnect switch is accessible
  • Outdoor unit has at least 60 cm clearance on all sides
  • Manufacturer warranty registered in your name

Who to call

These become real when filled in the Tier-B MOCs:

  • Licensed HVAC tech (Refrigeration and Air Conditioning Mechanic — TQ ticket)vendor-roster (Home Systems). Fill: company name, tech’s SkilledTradesBC certification number, phone, notes on strata experience and heat-pump rebate program familiarity.
  • Insurer / brokerinsurance-warranties (Home Systems). Fill: confirm your policy covers water damage caused by a condensate overflow from your unit, and whether a new cooling system affects your home-systems coverage.
  • Strata manager → Strata MOC. Fill: the alteration request process, which bylaws apply to cooling installations, and whether the building has any existing cooling infrastructure or building-wide restrictions.

Sources

Idea Compass

North: Where this comes from

East: Tensions / failure

South: Where this leads

West: What’s similar

Footnotes

  1. SkilledTradesBC — Refrigeration and Air Conditioning Mechanic is a Skilled Trades Certification trade in BC; must hold TQ (Certificate of Qualification) or be a registered apprentice; refrigerant handling requires this certification — https://skilledtradesbc.ca/refrigeration-air-conditioning-mechanic 2 3

  2. Lesperance Mendes Lawyers (Downtown Vancouver) — strata keeping cool: portable AC hose restrictions; Human Rights Code override of bylaws; Macario v. Strata Plan BCS1296 and Shannon v. The Owners — medical necessity and cooling — https://lmlaw.ca/2022/07/strata-rental-manager-alert-keeping-cool-in-strata-and-rental-properties/ 2 3 4 5 6 7

  3. Budget Heating — strata heat pump and AC installation BC guide 2026; written alteration request documentation requirements; noise and aesthetics considerations; approval timeline — https://budgetheating.ca/blog/strata-heat-pump-ac-installation-bc-guide-2026 2 3

  4. BC Coroners Service / Province of BC, Ministers’ statement — “619 lives lost during 2021 heat dome”; provincial response and heat alert system — https://news.gov.bc.ca/releases/2022PSSG0035-000911

  5. Ye et al., PMC / NIH — “Analysis of community deaths during the catastrophic 2021 heat dome: Early evidence to inform the public health response during subsequent events in greater Vancouver, Canada” — 434 community deaths, 440% above expected; only 34% of BC homes had AC; deprivation and age as primary risk factors — https://pmc.ncbi.nlm.nih.gov/articles/PMC8835552/

  6. BC Hydro, the provincial electric utility — heat pump rebates for home renovation; up to 1,500 for partial-home; HPCN contractor required; variable-speed compressor required — https://www.bchydro.com/powersmart/residential/rebates-programs/home-renovation/renovating-heating-system.html 2

  7. RenovateIndex.ca — central AC installation cost Vancouver 2026; typical project 4,950–200–$350; SEER 14–18 standard; Vancouver 18% above national average — https://www.renovateindex.ca/central-ac-installation-cost-vancouver 2 3 4 5

  8. Best Buy Canada blog — portable and window AC unit prices in Canada 2026; portable 700; window units 900 by BTU range — https://blog.bestbuy.ca/appliances/how-much-does-an-air-conditioner-cost-in-canada

  9. Home Depot Canada — window AC price ranges by BTU (5,000–8,000 BTU: 400; 8,000–12,000 BTU: 600; 12,000–14,000 BTU: 900) — https://www.homedepot.ca/en/home/categories/appliances/heating-cooling-and-air-quality/air-conditioners-and-portable-fans/air-conditioners/window-air-conditioners.html

  10. Eco Pro Heating — air conditioning installation cost 2026 guide for Vancouver homeowners; central AC 7,500 (existing ducts); single-zone mini-split 5,000; multi-zone 12,000+; permit requirements; what’s included in quotes — https://www.ecoproheating.ca/blog/air-conditioning-installation-cost-2026-a-guide-for-vancouver-homeowners 2 3

  11. Blueridge HVAC & Plumbing (Surrey/Vancouver) — heat pump installation cost BC 2026 complete guide; single-zone 6,000; multi-zone 2-zone 10,000; 3–4 zone 15,000; 5+ zone 18,000+; ducted heat pump 12,000; includes equipment, installation, permits, basic electrical — https://blueridgehvac.ca/heat-pump-cost-bc/ 2 3

  12. Lew Plumbing & Heating (Vancouver) — home air conditioner cost; central AC basic 6,500; mid-range 9,000; premium 12,000+; single-zone mini-split 8,000; ducted heat pump 13,000 — https://lewplumbing.com/home-air-conditioner-cost/ 2

  13. Ace Tech Ltd, Metro Vancouver HVAC company — annual HVAC maintenance Vancouver; professional tune-up 250; spring timing recommended; what’s included in a professional inspection — https://acetechltd.ca/heacool-services/ac-maintenance-vancouver/

  14. VISOA (Vancouver Island Strata Owners Association) — handling requests for heat pumps and air conditioners; SPA s. 71 significant-change requirement; Standard Bylaws 5, 6, 8; strata council duty to accommodate; “significantly unfair” under SPA s. 164 — https://visoa.bc.ca/resources/handling-requests-for-heat-pumps-and-air-conditioners/ 2

  15. Strata Property Act (BC Laws) — the governing statute (incl. ss. 135, 158, 164) — https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/98043_09