How to Check Temperature of Air Coming Out of Vents

When you have an air conditioner running, it’s crucial to check the temperature of the air coming out of your vents. This will ensure that your system is working properly and not wasting energy.

It’s not very difficult to do, but it’s important to do it correctly. If your Delta T (Tsupply – Treturn) is below 16deg-22degF, it can indicate a problem with your evaporator that needs repair.

Infrared Thermometer

An infrared thermometer is an effective way to check the temperature of air coming out of vents. These thermometers work by focusing infrared energy from a target onto a sensor called a thermopile. The sensor collects the infrared energy and turns it into heat, which is then turned into an electrical signal.

These thermometers can also measure temperature remotely, without having to touch the target object. This allows them to be used in a variety of applications, including DIY projects, automotive repairs, and heating and cooling system maintenance.

Infrared thermometers use an optical system with a lens to focus the infrared energy from the target object. This is commonly referred to as the field of view or spot.

The field of view widens with the distance between the IR measuring device and the surface being measured. To get the tightest field of view, hold the device at a perpendicular or 90deg angle to the object being measured.

Digital Thermometer

Digital thermometers are a great way to check the temperature of air coming out of vents. They are fast, easy to use and provide accurate results.

You can find many different types of digital thermometers. These include a probe thermometer, temple and forehead thermometer, ear thermometer and other types.

The most common type of digital thermometer is the probe type that can be used to measure oral, rectal and armpit temperatures. It has a long, thin probe that’s ideal for liquids and soft materials.

Another type is the ear thermometer that measures the infrared energy that’s radiated from the ear canal. It’s also less hazardous than mercury thermometers.

Most digital thermometers are made from durable plastics and include a battery that connects to the measuring sensor. They then produce precise readings and display them on an easy to read LCD screen.


The temperature of air coming out of vents is important because it can affect how comfortable your home is. High vent temperatures can cause stratification of your indoor air and create cold spots in certain rooms of your house.

You can check the temperature of air coming out of your vents using a thermostat. Simply place your thermometer in the vent and wait for a few minutes to record a temperature.

If the temperature reads much higher than you expected, this could indicate a problem with your thermostat.

In addition, if some of your vents seem cooler than others, this may indicate an issue with the ductwork or space between the blower and the vents.

Most professionals agree that the temperature of the air that exits a vent should be 16deg-22 degrees lower than the temperature of the air going into it. This is called Delta T and it can help you ensure your home stays warm or cool without having to use too much energy.

Paper Thermometer

You can check the temperature of the air coming out of your vents using a paper thermometer. These are small devices that have an infrared sensor. They work well and are cheap to boot.

You may also want to look into a non-contact infrared thermometer. These can be a little tricky to use, but they are a great choice for checking the temperature of a room or a specific area.

If you’re looking for the best way to check the temperature of air in your vents, the Tempa*DOT(r) single-use thermometer is one of the most hygienic ways to do it. These thermometers are specifically designed to prevent the transfer of pathogens that could potentially harm a patient. They come in a variety of colors to suit your needs, and are easy to clean and store. They’re a clear winner for the medical industry and they are an excellent choice for consumers too. Shop them at Emergency Medical Products today!

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