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HVAC, heat-pump and dehumidifier condensate drainage

Map pans, slopes, traps, pumps, possible neutralization, discharge, freeze protection and alarms to prevent leaks, odours and mould.

VERT / GREEN

Locate every condensate source and physically trace its discharge.

JAUNE / YELLOW

Poor slope, incorrect trap, dirty pump or freezing discharge can cause overflow and equipment shutdown.

ROUGE / RED

Acidic/corrosive condensate, water near electricity, concealed overflow or non-compliant discharge: professional correction.

Interactive triage

Helps choose the next step; does not replace design, permits or professional diagnosis.

Useful tools and data

What the professional checks

Official sources

Checked 2026-08-22.

Related path

Continue with the right tools

These links connect this page to the next useful checks and decisions without repeating the full content.

Start from a symptomOrganize plausible causes, observations, urgency and the right professional.Open →Track water useCompare meter readings and flag unusual changes.Open →Review water resilienceConnect flooding, drainage and future events to building adaptations.Open →Score home resiliencePrioritize water, outages, fire, climate, health and records.Open →Plan site, drainage and utilitiesCoordinate access, water, sewer, wells, septic, grading and site constraints.Open →

Tools related to this issue

Special check related to this project

V14

Systems to check before closing the work

V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.

Renovation dependenciesVentilation and pressurePlumbing pressure and systemCode versions
V15

Remaining system checks not to miss

V15 covers issues that can block a project, cause a loss or become expensive once concealed.

Before closing wallsPrivate sewer/water servicePost-renovation commissioningCodes + climate by province
V16

Advanced diagnostics to cross-check

V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.

Rainwater and greywaterPyrite, pyrrhotite and ochre
V17

Specialized systems to cross-check

V17 completes gas, soil, water, fire, climate and structural interfaces.

Culvert and ditch
V18

Specialized diagnostics to verify

V18 connects systems that become costly or regulated when a primary project triggers them.

Low-slope roofRefrigerant circuit
V19

Edge systems to integrate into the project

V19 covers interfaces that become important when multiple home systems interact.

Whole-home humidity controlGreen roofStormwater infiltration

Hidden systems and critical interfaces

These checks target costly problems that often appear only after opening assemblies, conversions or changes of use.

V26

Often-overlooked service interfaces

V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.

HVAC zoning and motorized dampersHeat pump outdoor unit, snow and defrost
V28

Finish and service details to verify

V28 connects small details that become costly once finishes are closed.

Plumbing cleanouts and service accessCladding clearance above grade
V30

Shared, access and specialized interfaces

V30 connects projects where multiple systems, owners or rules meet.

Pool: pump, filter, heating and equipment
V31

Commissioning and everyday safety

V31 helps verify systems after work and document the values that make a home safer to operate.

Condensing-appliance condensate
V47

V47 interfaces not to miss

These details are small on a drawing but can control water, structure or durability.

Building trapCast-iron stackSump discharge freeze