Have you ever called someone for an HVAC check and assumed that your home’s air quality testing was also taken care of? It feels like the same thing. Someone comes in, looks at your home’s air circulation and ventilation systems, and gives it a thumbs up. 

So it’s all good, right? Not quite. 

This kind of assumption is where the confusion begins. They may sound the same, but the debate around indoor air testing vs HVAC checks is really about two different services. They’re designed for two different purposes, and if you mix them up, your home’s air quality or HVAC systems may suffer. 

In this article, we break down the differences between the two. 

What is Indoor Air Testing and Why Does it Matter?

Indoor air testing is a professional assessment of the air quality inside your home. It identifies what’s present in the air you breathe every day. Typically, air quality assessment looks for things like pollutants, allergens, mold spores, gases, and chemicals.

Many of these contaminants are invisible and odorless. Without home air quality testing, there’s no way to know if they’re present inside your home. 

Air testing for homes matters because:

• People spend around 90% of their time indoors (according to the EPA)
• You can’t see, smell, or taste many contaminants
• Symptoms like headaches and fatigue may be misdiagnosed
• Existing conditions like asthma can get worse 
• Some contaminants, like radon and carbon monoxide, can be life-threatening
• Recent renovations can release VOCs into the air
• A clean-looking home isn’t necessarily a safe one

What are HVAC Checks and Why are They Important?

HVAC checks are professional inspections that look at your home’s heating, ventilation, and air conditioning systems. It checks how well these systems are functioning, and whether they’re doing their jobs efficiently. 

One of the many HVAC air quality myths is that when you get your HVAC systems checked, you can be sure that your IAQ is also fine. But in reality, HVAC assessment focuses on the equipment that moves and conditions the air in your home. It doesn’t check the air quality itself. 

Still, HVAC checks also matter. Here’s why.

• Your HVAC system runs year-round
• Small issues, when ignored, may become expensive repairs fast
• Dirty HVAC systems push contaminants into your home
• Poor airflow can strain the entire system
• Skipping checks shortens the lifespan of these systems
• Filters and ducts get clogged over time 
• A poorly maintained system cannot filter air properly 

What Does Indoor Air Testing Include?

Indoor air quality testing covers a number of checks. Each assessment targets a different pollutant or contaminant in your home. What gets tested depends on your concerns, your health issues, and what the professional recommends. 

Here’s what thorough indoor air quality testing for homes usually includes:

• Particulate Matter Testing: This test checks for tiny airborne particles in the air that can irritate your lungs, like dust, pollen, and soot. 
  
• Mold and Spore Testing: This test detects the presence of mold and mold spores and identifies the type of mold present. With around 47% of homes in the US having mold and dampness issues (as per the National Institutes of Health), this is a crucial part of indoor air health testing.
  
• Humidity and Moisture Assessment: This assessment evaluates moisture levels in the air. Moisture contributes to mold growth and allows colonies to thrive. 
  
• VOC Testing: This identifies if volatile organic compounds are present in your home. VOCs are released by various household products like paints, cleaning products, furniture, and building materials.
  
• Carbon Monoxide Testing: This test checks for the presence of carbon monoxide, an odorless and colorless gas that becomes dangerous even at low concentrations.
  
• Radon Testing: This test measures radon levels in your home. Radon is a naturally occurring radioactive gas that seeps in through foundations and lower floors. The EPA recommends that action be taken if radon levels are 4 pCi/L or higher. 
  
• Allergen Testing: This type of check helps identify specific allergens like pet dander, dust mites, and pollen that are actively circulating in your living space.
  
• Formaldehyde Testing: In this test, experts check the levels of formaldehyde that come from building materials, furniture, adhesives, and everyday household products.

At InHaus Lab, we check for all these air contaminants. Give us a call and book your indoor air quality testing appointment today. 

What Do HVAC Checks Include?

An HVAC check covers all the equipment that takes care of your heating, ventilation, and air conditioning. Here, a trained technician goes through each component methodically to catch small problems before they turn into bigger ones. 

Here’s what a thorough HVAC check includes:

• Filter Inspection and Replacement: The technician checks your air filters for dirt and blockage, and replaces them if they’re no longer effectively trapping particles. 
• Thermostat Calibration: This ensures that your thermostat is reading and regulating the temperature accurately. 
• Ductwork Inspection: Here, the technician examines the ducts for leaks, blockages, or damage that could reduce airflow or pull in unfiltered air.
• Coil Cleaning: Both the evaporator and condenser coils are checked and cleaned to make the heat exchange more efficient.
• Refrigerant Level Checks: Experts check the refrigerant levels to make sure the system is cooling your home efficiently and to see if there are any leaks. 
• Electrical Component Inspection: All wiring, connections, capacitors, and contractors are checked for wear, corrosion, or damage that could cause system failure. 
• Drainage System Checks: The condensate drain and drip pan are inspected and cleared to prevent water buildup, leaks, and mold growth.

Indoor Air Testing vs HVAC Checks: Key Differences Between the Two

To understand which of these two checks is needed for your home right now, you need to understand the indoor air testing vs HVAC comparison. Check out the key differences between these two types of assessments below:

Indoor Air Testing vs HVAC Checks: How They Work Together

Your HVAC system and your indoor air quality are both deeply connected. When the HVAC systems aren’t running properly, your indoor air health suffers. And when your air quality is poor, it ends up clogging or affecting the HVAC system in other ways. 

This is why homeowners need to stop looking at it as an indoor air testing vs HVAC check debate and start considering the importance of each assessment. 

An HVAC check tells you if the system is working well. An air quality assessment tells you if it’s doing its job right. You need both answers to get a full picture of your indoor air health. 

When to Get IAQ Testing Done?

You need to get your indoor air quality tested if:

• You or someone in your home has unexplained allergies or health issues
• You’ve recently renovated or had new furniture installed
• You’ve moved into a new home (whether it’s recently built or older)
• There's a musty smell or visible mold anywhere in your home
• Your home has poor ventilation
• Someone’s existing respiratory issue has suddenly worsened
• You haven't had your air tested in over a year

When to Get HVAC Checks Done?

You need to get your HVAC systems checked if:

• Your energy bills have gone up without any clear reason
• Your HVAC system is making unusual noises
• Some rooms feel warmer or cooler than others
• You haven't had a check done before summer or winter
• The system is over 10 years old
• You've noticed more dust settling around your home than usual
• Your humidity levels feel off, and it’s either dry or too damp

Some homeowners ignore these signs, while others are prompt about their HVAC checks. This Reddit post goes into the details of how often homeowners get their HVAC inspected. 

Get to Know Your Home Better With Indoor Air Testing

Ultimately, both indoor air quality testing and HVAC checks are important for your home. You need to schedule both these services regularly. That way, you can take care of HVAC systems maintenance and indoor pollutants detection.

When you get your IAQ tested, make sure you look for a service provider who performs comprehensive air quality assessments. 

At InHaus Lab, this is exactly what we do. We’ve tested over $100 million worth of homes in Denver, Aspen, Minneapolis, and Vail, and we’ve helped uncover hidden air quality issues in more than 80% of them. 

With our science-backed methods, we can help you, too. Get in touch with us, and we’ll share a quote with you in just 30 minutes. 

Indoor Air Testing vs HVAC Checks FAQs

1. Indoor air testing vs HVAC checks: which is more important?

Both matter, but for different reasons. HVAC checks keep your heating, ventilation, and air conditioning systems running well. Air quality testing tells you what’s in the air you’re breathing. 

2. Does my HVAC system affect the indoor air quality in my home?

Absolutely. A dirty or faulty HVAC system can circulate dust, mold, and pollutants straight into your rooms. This makes the air quality worse indoors.

3. Does indoor air testing include HVAC checks in 2026?

Not usually. They’re separate services. Air quality testing for homes measures the level of air contaminants indoors. HVAC checks look at the condition of your equipment. 

4. How often should I schedule HVAC checks?

The sweet spot is twice a year. Schedule one check before summer and one before winter. Don’t skip these assessments because they can save you money in the long run. 

5. How often should I get my home’s indoor air quality assessment done?

Once a year works best for most homes. However, if someone has allergies or asthma, or if you’ve had recent renovations, do it sooner. 

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References:

• EPA, “Indoor Air Quality”
• National Institutes of Health
• EPA, “What is EPA's Action Level for Radon and What Does it Mean?” 
• Reddit