Frequently Asked Questions

Blood pressure is the measure of blood force circulating on the walls of your blood vessels.
Systolic is the maximum pressure your heart contracts in a cycle while Diastolic is the minimum value the blood pressure reaches when the ventricles relaxes.

Provided below is the table for your reference.
Blood Pressure Categories Systolic (top) Diastolic (bottom)
Low Blood Pressure < 90 mmHg < 60 mmHg
Normal Blood Pressure < 120 mmHg < 80 mmHg
Elevated Blood Pressure 120 - 129 mmHg < 80 mmHg
Stage 1 Hypertension > 130-139 mmHg > 80-89 mmHg
Stage 2 Hypertension > 140 mmHg > 90 mmHg
Hypertensive Crisis > 180 mmHg > 120 mmHg
Hypertensive Crisis > 250 mmHg > 120 mmHg

Home monitoring can help you keep track of your blood pressure and help your doctor diagnose potential health conditions.

Zen BP is a hospital grade device that is clinically proven to be accurate.

Managing your lifestyle plays an important role in controlling your blood pressure.

Here are things you can do:
  • Lose extra pounds - be more active and exercise regularly
  • Eat healthy - try DASH or Dietary Approaches to Stop Hypertension eating plan
  • Kick and limit habits - quit smoking and limit alcohol intake
  • Reduce stress - do things that makes you happy

It is normal for your blood pressure to change because your body adapts to different situations. Medicine intake, stress level, activity levels may affect your blood pressure. For meaningful comparison, you can take your blood pressure on a regular basis under similar conditions.

Zen BP can be used on both arms but most people prefer to use it on their non-dominant hand. Although, we recommend you to use it on your left arm because it is closer to your heart.

There are different causes of getting inaccurate readings like:

  • Wrong cuff positioning and body posture, not on a sitting position, your arm and back are not supported; your feet are not flat on the floor.
  • Eating, drinking alcohol or caffeinated beverages, smoking, exercising, and the likes before taking the BP measurements.


Our body necessarily reacts to stress, disease, medicines and other situations we are doing.If you are going to take your blood pressure, make sure you are in a proper position and rest for at least 5 minutes.

You can download and install Zen BP app from App Store for iOS and Google Play for Android devices.

It takes around 5 hours to fully charge the battery of your Zen BP for the first use. The next or succeeding uses may only require 2 to 3 hours.

Zen BP Monitor can be used within 24 hours continuously or an average of 48 times.

The monitor has a battery indicator which you may see on the upper right corner of screen.

Washing the cuff is not recommended instead you may wipe the inner side of the cuff with a soft cloth, and lightly moistened with Ethyl alcohol.

Zen BP may still be used without the app. However, the app allows you to save vital readings for more individuals, whereas, the Zen BP itself can only save data records up to a maximum of 2 persons.

Zen BP can record the blood pressure readings, pulse rate and time, the readings will store automatically on the device. You can preview all the readings by clicking the historical data review button.

Zen BP is safe for check-in baggage as long as it is turned off and secured properly inside the pouch.

Zen BP is rated IP22, a standard rating for indoor devices, which means that it can be expected to work properly under water droplet situations. Although, we advise to keep the unit dry and away from harsh conditions.

The standard warranty period is 12 months or 1 year from the date of delivery.

Service center may be coordinated with the store or dealer where you purchased the BP monitor. You may contact us at (02) 410-4613 loc 108/109 or email us at customercare@drzens.com so we can personally assist you.

You may contact us at (02) 410-4613 loc 108/109 to address your concern and help you properly.

Primary Filter – It traps dust particles such as floating debris, pollen, dust mites and pet dander.

Cold Catalyst Filter – Absorbs air pollutants, toxic gas and smoke particles.

Cellular-Activated Carbon Filter – A nanocrystal non-toxic filter that resolves and disintegrate formaldehyde and benzene harmful gas and odor.

Antibacterial filter – An anti-molds and moisture filter that kills germs and bacteria

High Efficiency Particulate Air (HEPA) Filter – Blocks tiny dust particle larger than 20 nanometers in diameter such as Allergens, viruses and PM2.5 particles that can easily enter our lungs. Achieved 99.97% filtering rate.

Ultraviolet (UV) Sterilizing light – A powerful 365 nanometer wavelength UV light that kills germs, bacteria, mites, fungus, and other contaminants.

Anion Purification – Double core negative ion filter that eliminate dust and static electricity. Activates the physiological activities of the human body and increases clean, healthy air moisture to help people suffering from asthma and Allergic rhinitis.

The filters are automatically installed once you purchase Purifirst.

Purifirst works only for about Php 0.85 per hour!

The standard warranty period is 12 months or 1 year from the date of delivery.

  • Before you plug the power cord, remove first the yellow sticker on top of the power button and the plastic cover of the filters inside.
  • Gently pull both sides of the front cover of PuriFirst to open the front panel.
  • Unlock the two filter clip located at the upper left and right corner of the filters by rotating it inward then remove each filter and its plastic cover one by one.
  • Place the filter back, there is a number indicated at the upper portion of every filter. The sequence of the filter should be 3 at the inner part, 2 at the middle and 1 at the front. Lock the two filter clip and return the front panel cover.
  • When you’re ready, Plug the PuriFirst power cord at any convenient power outlet.
  • Turn on the power switch using the remote control or manually by pressing the “power” button.
  • When the PuriFirst is already on, it will automatically set to “Auto” mode.
  • The “Auto” mode will automatically turn on the anion/ionizer and UV filter and set the fan speed according to the particle count within the area; you will see the particle count on the display panel.
  •      - High Fan Speed will be activated in “auto” mode and when the particle count is >250, you will see that the front indicator light will turn into red.
        - Medium Fan Speed will be activated in “auto” mode when the particle count is < 250, You will see that the front indicator light will turn into orange.
        - Low Fan Speed will be activated in “auto” mode when the particle count is < 120, You will see that the front indicator light will turns into green.
  • You can also select the fan speed manually to the speed you want by pressing the “speed” button, but this time the auto mode will be turn off.
  • The Ionizer or “Anion” button will let you turn on or turn off either manually or using the remote control.
  • The “UV” button will let you turn on/off the Sterilizing UV light via manual or via remote control.
  • You can also press the “sleep” button when you are going to sleep to reduce the consumption of electricity. All lights on top and front panel will turn off but it will continuously operate.
  • In case you forget to press the “sleep” button, Purifirst has a light sensor that will automatically set to a sleep mode 5-10 minutes after turning off your room lights.
  • You can set the operating time by pressing the “timer” button, you can set the time with the increments of 30 minutes and at a maximum of 12 hours setting. Five (5) seconds after setting the time, it will go back to the display of the particle count, if you want to cancel the timer, just make a long press on the “timer” button.
  • You can also press the “Child lock” button to activate child lock mode.
  • If you want to make the purified air product smell scented, just pull out the infuser box located at the right side of the purifirst, and then put 2-3 drops of water base essential oil.
  • To turn off the device just press the “power” button manually or via remote control.