Walter Shillington writes about products he knows firsthand. His articles focus on healthcare, electronics, watches, and household items.
One of the first air purifiers I reviewed was a large unit capable of removing the foulest of odors from a very large room. I loved it. However, due to the high cost of replacing this device's exotic four-stage filter, it is best fitted for areas where the air is unusually putrid.
Another smaller air purifier fits unobtrusively atop a shelf in my kitchen. Replacement filters are available at a reasonable cost, and this device works effectively. Unfortunately, the highest fan setting is excessively noisy and seldom used.
The biggest lesson I've learned is the importance of purchasing an air purifier that is well matched to the job it is intended to perform. Consider the initial price of the device, room size, noise level, and replacement filter cost when choosing a new unit.
Today I am examining The Dreo Macro Pro Air Purifier. This device is capable of cleaning the air of a large room and features the ability to automatically adjust its fan speed when changes to air quality are detected.
The Dreo Macro Pro is composed of black plastic with gray accents. It is 15.4 inches tall with a diameter of 9.8 inches.
A fan draws air through tiny holes perforating the sides of this air purifier. This air passes through a prefilter, H13 HEPA filter, and an activated carbon filter. It is then directed upward, exiting through the top of the device.
This air purifier is fitted with an air quality sensor. One option that can be selected using a top-mounted touch-sensitive button is an automatic mode that utilizes the air quality sensor output to adjust the fan's speed.
Power is provided using an AC adapter that plugs into the back of the device.
- Manufacturer: Dreo
- Name: Macro Pro Air Purifier
- Model: DR-HAP002
- Weight: 3.3 kilograms (7.3 pounds)
- Dimensions: 25 x 39 centimeters (9.8 x 15.4 inches)
- Power required: 120V 60Hz 1A
- Rated power: 36 watts
- Tobacco Smoke CADR: 183 m³/h
- Dust CADR: 175 m³/h
- Pollen CADR: 204 m³/h
- Noise level: 20dB~54dB
- Filter: Combined Prefilter/H13 HEPA Filter/Active Carbon Filter (replaceable)
The Macro Pro is a medium-sized unit that is attractively designed with flowing curves and an easy-to-operate control panel.
This air purifier is designed for use in medium to large-sized rooms. It is fitted with a combination H13 True HEPA filter, activated carbon filter, and prefilter, which captures up to 99.97% of airborne particles. These include dust, pollen, dander, hair, and smoke particles as small as 0.3 microns.
The filter change reminder LED will flash when the filter reaches the end of its useful lifespan. Replacements are available at a reasonable cost.
The Dreo Macro Pro has a CADR (clean air delivery rate) in the range of 175 cubic meters per hour. This figure denotes the amount of air that is cleaned of particles sized 0.3 microns or larger within 60 minutes.
Due to its generously sized filter and the ability to select one of three different speeds, this air purifier can competently clean the air of medium to large-sized rooms.
This air purifier may be set to three different speed settings. In the sleep mode, the fan revolves slowly, creating no detectable sound. The noise is more noticeable but not particularly disturbing when the second setting is selected. Like all devices of this type, the Macro Pro becomes considerably louder when running at its highest speed. Noise levels range between 20dB and 54dB.
Air Quality Sensor and Indicator Light
Modern air purifiers like the Dreo Macro Pro utilize an air quality sensor to determine the condition of nearby air. The fan's speed will automatically increase if poor quality air is detected when the device is in auto mode. As air quality improves, the air purifier will decrease the fan's rotation rate. This type of system reduces power usage and minimizes noise levels.
The air quality is reflected by the color of the indicator light visible at the front of the air purifier. When the device is initially turned on, the LED will flash a series of colors. Then it will turn red as the sensor begins to test the air. The fan speed will increase to maximum if the air purifier is set to auto.
The sensor will continue analyzing the air until its sample size is sufficient to determine air quality. Providing the air is clean, the indicator will eventually turn blue, and, in auto mode, the fan speed will drop to its lowest level.
I smoked a cigarette while sitting alongside the Dreo Macro Pro during one test. As the surrounding air quality decreased, the indicator noted the change, and the fan speed increased. As the air was cleaned, the air purifier again reduced its fan's rotation rate.
The controls include several settings intended to adjust the fan's speed. I usually select auto mode, allowing the rotation rate to be determined by air quality.
Other buttons are used to set a timer or activate the device's child lock.
If properly maintained, this air purifier will last for many years. The fabric prefilter should be cleaned with a soft dry brush every few weeks, and the primary filter is rated for six to eight months.
This mid-sized device perches atop a cabinet in my dining room. It is well constructed, easy to maintain, and reasonably priced replacement filters are available.
It is an excellent example of the current generation of air purifiers that automatically control fan speed using a built-in air quality sensor. This new capability, in my opinion, is a game-changer. The Dreo Macro Pro is recommended.
© 2022 Walter Shillington