Updated
A room can be warm and still feel stuffy. Heating, cooling and fresh-air ventilation do different jobs, so a thermostat adjustment may not address the problem. Start by noting where and when the air feels different.
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Look for a pattern
Record persistent condensation, lingering cooking odours or rooms that feel stale when occupied. Note the weather and whether doors are usually open or closed. These observations help define a problem, but they do not identify its cause on their own.
Check accessible controls
Find the bathroom fan, range exhaust and ventilation controls you normally use. Check the owner instructions and note whether the expected fan response occurs. Keep accessible grilles clear of stored items; do not remove guards, enter ducts or change balancing settings.
Describe the house as it is now
Tell the technician about new windows, air sealing, a finished basement or a change in occupancy. A system selected for an earlier layout may need review. Explain whether the concern is the whole house or one room.
- Identify any HRV or ERV and provide its model.
- Describe the controls and usual operating schedule.
- Mention recent renovations and recurring moisture.
Separate three different questions
Describe temperature, moisture and air quality as separate concerns. “The bedroom is cold,” “water collects on the window” and “cooking odours linger upstairs” may occur together, but they do not establish one common cause. Record each concern rather than asking for a larger fan or a different filter before an assessment.
Health Canada’s ventilation guidance describes ventilation as movement of air into and out of the home, and explains that occupancy, airtightness and seasons affect it. That is different from simply circulating room air. Ask which equipment in your home actually exchanges outdoor air and which equipment mainly heats, cools or filters air already inside.
Make a useful observation log
Choose a few representative situations instead of watching the controls constantly. Note the room, time, weather, number of occupants and activity. For condensation, describe the surface and whether it is occasional or recurring. For an odour, describe when it starts and how long it remains. Photographs can show the location, but a photograph cannot establish a pollutant concentration or diagnose a health condition.
- Does the concern follow showers, cooking, laundry or a crowded room?
- Is the expected fan response absent, intermittent or unusually noisy?
- Did the pattern begin after new windows, air sealing or a renovation?
- Are normally used doors and grilles open and accessible?
- What ventilation controls are in use, including any boost timer?
Do not dismantle an intake, climb to an exterior vent or change balancing dampers to improve the log. Note inaccessible locations and leave their inspection to someone equipped to reach them safely.
Check what can be maintained by the owner
Locate the manual for the HRV, ERV or other ventilation equipment before treating every grille alike. Ask the technician to point out owner-accessible filters and the permitted care procedure. If the instructions or safe access are missing, report that limitation. An HRV filter, furnace filter and bathroom exhaust fan are different items and should not be assumed to share a cleaning method or schedule.
Keep source control in the discussion. Health Canada recommends reducing indoor pollutant sources alongside ventilation. For example, describe ongoing renovation materials or stored products rather than assuming ventilation equipment alone will address every concern. Persistent moisture or a suspected building leak may need attention beyond the ventilation system.
Agree on what a recommendation should explain
Ask whether the proposed visit assesses equipment operation, distribution or measured airflow, and what access it needs. The findings should connect a specific concern to the work recommended. If a new unit is proposed, ask which existing problem it is intended to solve, what supporting duct or control work is included and which conditions remain outside the scope. Keep the observations and the report so any later adjustment can be compared with the original concern.
Sources and owner information
Ask what the assessment establishes
A ventilation review may involve the equipment, controls, air paths and measured performance. Ask which checks are proposed and which conditions remain unexplained. Health Canada recommends addressing indoor pollutant sources alongside ventilation; buying a filter alone is not a complete response to every air-quality concern.
Reference: Health Canada: improving indoor air quality.
Your next step
Book routine service or call 506.696.7000. For planned installation work, request an estimate.
Related services
Ventilation · HVAC System Inspections