Indoor air quality testing that measures before it recommends
Stuffy rooms, lingering odors and dusty surfaces all have measurable causes. Testing identifies which ones are present so the fix targets the real problem.
Equipment is recommended only when the readings show a reason for it.
Results are shared room by room, with the numbers.Why air quality inside can differ from outside
Homes are built tighter than they used to be, which saves energy but also traps whatever is released indoors. Cooking, cleaning products, new furniture, paint, pets, candles, gas appliances and simple breathing all add particles, gases and moisture to indoor air. Without enough ventilation and filtration, those pollutants build up, and the result can be headaches, stuffiness, dry eyes, odors or dust that returns the day after cleaning.
Testing replaces guesswork with measurements. Portable instruments record fine particulate matter, total volatile organic compounds, carbon dioxide as a proxy for ventilation, carbon monoxide, temperature and relative humidity. Comparing readings across rooms and against outdoor air shows where problems originate and whether the HVAC system is helping or hurting.
The report that follows explains each result in plain terms and lists practical steps, from simple changes like adjusting a bathroom fan to equipment options when the data supports them. We do not recommend a purifier or ventilator unless the measurements give a reason.
- Airborne particles
- PM2.5 and PM10 readings
- Gases
- VOCs, carbon dioxide, carbon monoxide
- Moisture
- Relative humidity and dew point
Clues that the air inside needs a closer look
One of these alone may be minor. Several together are worth measuring.
Stale or stuffy rooms
Air that feels heavy, especially in bedrooms overnight, often reflects elevated carbon dioxide from limited ventilation.
Dust returns quickly
Surfaces that need dusting constantly can point to leaky return ducts pulling in attic or crawlspace dust, or to an inadequate filter.
Condensation on windows
Frequent window condensation in cold weather signals high indoor humidity, which can support mold growth in hidden areas.
Odors that linger
Smells from cooking, pets or chemicals that do not clear suggest poor air exchange or a source that keeps releasing gases.
Symptoms that ease away from home
Headaches, irritation or congestion that improve when you leave the house can be linked to indoor air, and testing helps rule causes in or out.
Recent renovation or new furnishings
New flooring, cabinets, paint and furniture can release VOCs for weeks or months after installation.
How an air quality assessment works
Conversation about concerns
We ask about symptoms, odors, renovations, pets, appliances and ventilation habits to decide where and what to measure.
Baseline and room readings
Outdoor readings are taken for comparison, then instruments record particles, gases and humidity in the main living spaces and problem rooms.
HVAC and ventilation inspection
Filters, return ducts, the blower compartment, bathroom and kitchen exhausts and any fresh air intakes are inspected for sources and gaps.
Combustion safety check
Fuel-burning appliances are checked for carbon monoxide at the appliance and in living spaces, along with basic venting condition.
Report and recommendations
You get the readings, what they mean and a prioritized list of steps, with flat prices for any work that would help.
Reading the numbers: humidity, carbon dioxide and particles
Relative humidity has a large effect on comfort and health. Guidance from the EPA suggests keeping indoor humidity between 30 and 50 percent, and ideally below 60 percent, to discourage mold growth and dust mites. Winter readings that fall well below that range cause dry skin and static, while summer readings above it make homes clammy and can encourage mold on cool surfaces. Humidity problems often trace back to equipment sizing, ventilation or moisture sources such as a damp basement.
Carbon dioxide is not usually harmful at typical indoor levels, but it is a useful indicator of ventilation. Readings that climb steadily in occupied rooms show that fresh air is not being brought in fast enough. Fine particles, measured as PM2.5, come from cooking, candles, smoking, wildfire smoke and outdoor pollution, and filtration is the main defense. Seeing where each reading is high tells us whether the answer is better filtration, more ventilation, humidity control, source removal or a combination.
What this testing does not cover
Standard IAQ testing does not include radon, asbestos, lead or laboratory mold identification. If readings suggest one of those concerns, we will tell you and recommend a specialist who performs that specific testing.
What testing measures and how results are used
Indoor air quality covers several different factors, and a useful assessment measures the ones that relate to your concerns. Relative humidity is one of the most important. Air that is too dry in winter can irritate skin and airways and cause static and wood shrinkage, while air that is too humid in summer supports mold and dust mites and makes rooms feel clammy even when the temperature is comfortable.
Particulate levels show how much fine dust, smoke and allergen-sized particles are suspended in the air. Measuring particulates in different rooms and while the system is running or off helps identify whether filtration, duct leakage or specific activities such as cooking are driving the levels. Carbon dioxide readings indicate how well a home is ventilated, since rising levels mean indoor air is not being exchanged with outdoor air often enough.
Volatile organic compounds come from paints, cleaning products, furnishings and building materials. Elevated readings after a renovation or new furniture delivery can point to the need for more ventilation. Carbon monoxide checks near fuel-burning appliances are part of any assessment because they relate directly to safety.
The value of testing is in the plan that follows. Instead of guessing at solutions, results point to specific actions such as upgrading filtration, sealing return ducts in dusty spaces, adding humidification or dehumidification, improving ventilation or addressing a combustion issue. Retesting after changes confirms whether they worked.
Air quality mistakes to avoid
These common approaches often fail to improve indoor air.
Buying equipment before measuring
Air cleaners and humidifiers solve specific problems. Without data, it is easy to spend money on equipment that does not address the real issue.
Relying on scent to judge air quality
Many pollutants have no odor, and fragrances can mask problems rather than solve them.
Ignoring humidity
Humidity affects comfort, health and building materials. It is often the most important factor to correct.
Overlooking duct leaks
Leaky return ducts in attics, crawlspaces or garages can pull dust and fumes directly into the system.
Sealing a home without ventilation
Tightening a house saves energy but can trap pollutants. Ventilation should be planned alongside air sealing.
What determines the scope of an assessment
- Home size and number of rooms
- Larger homes and those with multiple levels or HVAC zones need more measurement points to give an accurate picture.
- Specific concerns
- A general check differs from an investigation of a specific odor or symptom, which may require longer monitoring in certain rooms.
- Fuel-burning appliances
- Homes with gas or oil appliances receive combustion checks for each appliance, adding time to the visit.
- Follow-up testing
- Some owners like a second round of readings after improvements to confirm the changes made a measurable difference.
Air quality testing questions
- Is indoor air really worse than outdoor air?
- It can be. According to the EPA, indoor levels of some pollutants can be several times higher than outdoor levels. Testing your own home shows whether that is the case where you live.
- Will you try to sell me an air purifier?
- Only if the readings show a problem that one would address. Many results are improved with simpler changes, like better filtration, running exhaust fans or sealing return leaks.
- How long does testing take?
- A typical visit takes a couple of hours, depending on the size of the home and how many rooms and appliances need to be checked.
- Do you test for mold?
- We measure humidity and look for conditions that support mold, like condensation or water intrusion. Laboratory mold sampling and identification is a separate specialty we can refer you to.
- Can my HVAC system make air quality worse?
- Yes. Leaky return ducts can pull in dust and fumes from attics, garages or crawlspaces, dirty coils and drain pans can harbor growth, and poor filtration lets particles circulate.
Put numbers to what you are breathing
Book an air quality assessment and get room-by-room readings with practical next steps.