Delta Electronics VFB25ACH Breez 80 CFM Humidity Sensor Exhaust Fan, Less than 0.3 Sone

Item #: BCI1121978
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Technical Specs

Installation Guide
CAD Sheets
Specification Sheet
What comes in the box?
Amperage 0.12
CFM 80
CFM (High) to Sones 80 to .3
Collection BreezSignature
Configuration Bath Fans
Duct Size 4" Round
Energy Star Yes
Grille Length 12.36
Grille Shape Square
Grille Width 12.36
Heater Included No
Housing Depth 7.98
Housing Length 9.68
Housing Shape Square
Housing Width 9.68
Humidity Sensing Yes
HVI Certified No
Installation Type Ceiling
Light Included No
Material Galvanized Steel
Night Light No
Series BreezSignature
Sones 0.3
Speeds 1
UL Listed Yes
Voltage 110
Wattage 8

Delta Electronics VFB25ACH Breez 80 CFM Humidity Sensor Exhaust Fan, Less than 0.3 Sone

Extra Savings on Installation - NO Special Switch or Wiring Needed!

  • Highly efficient DC Motor, noise level less than 0.3 Sone
  • Cycle switch ON/OFF for humidity sensor mode and full speed mode
  • Annual energy cost for 24/7 operation is approximately $7.62
  • Self adjusting motor to humidity levels
  • Blue and amber LED indicator lights to show humidity sensor mode and full speed mode

Innovative design for long life, low noise and low power consumption, the Delta Breez humidity sensor exhaust fan model VFB25ACH delivers air flow rate of 80 CFM at <0.3 Sone.  Power consumption is only 8 Watts with an efficiency rating of 10 CFM/Watt. The life expectancy for this fan is 70,000 hrs, which is about 8 years running continuously. This quiet energy efficient bathroom fan combines several design innovations, including a switching power supply that converts AC 110~220V power source to DC power to drive a DC brushless motor. This design provides a quieter solution with energy savings up to 65% compared to traditional AC motor products.  Users can cycle switch on/off for humidity sensor mode and full speed mode. This product has a default humidity threshold setting of 50% humidity environment. In humidity sensor mode, fan will kick in when the humidity level reaches 50% and above, and will turn off automatically after the humidity level comes back down to lower than 50%. The motor will adjust the speed according to humidity levels. When humidity level is high, the fan will spin faster to quickly exhaust the moisture. When humidity level is low (but still higher than 50%), the fan will run at a lower speed, which allows you to continue to vent for better indoor air quality. This product also incorporates a dual color (blue and amber) LED indicator to show if it is running at humidity sensor mode or full speed mode.

Because of the effects it has on health, comfort, and serviceability, indoor air quality in our homes is becoming an increasing concern to many people. The American National Standards Institute (ANSI) has recommended a mechanical exhaust system to be installed in your home to provide whole building air ventilation (ASHRAE Standard 62.2-2007) in order to improve indoor air quality. This Delta Breez VFB25ACH humidity sensor exhaust fan is an excellent product to achieve this goal with its superior features of ultra low power consumption, and almost silent operation. Cycle switch on/off in between humidity sensor mode and full speed mode for continuous or smart operation. The energy cost for operating this fan 24/7 for an entire year is less than approximately $7.62.

Power rating of 110~220volts/50~60Hz; DC Brushless motor equipped with thermal cutoff fuse; Galvanized steel body housing; Detachable 4" diameter duct adapter; Built in back draft damper; Easy installation; Housing dimensions (LxWxD) = 9.68" x 9.68" x 7.98"; Grille dimensions = 12.36" x 12.36"; Attractive grille design using ABS material; Grille attaches directly to housing with torsion springs; UL and cUL listed for tub/shower enclosure when used with GFCI branch circuit wiring; DC motor technology provides built in soft start function to reduce motor start noise and automatically powers OFF when impeller is locked abnormally; 3 year limited warranty.

Additional Delta Electronics Links


This product is listed under the following manufacturer number(s):

  • VFB25ACH

*Denotes a finish or option that has been discontinued

10 Questions from the Community

  • Does fan cut itself off automaticaly when the humidity comes back down to normal?

    A. Yes, the Delta Electronics VFB25ACH Humidity Sensing Exhaust Fan first automatically slows down as the humidity decreases and then does turn off automatically when the humidity is back to normal. It can also be set to whisper mode to provide always-on whole house air recirculation. The estimated energy cost for doing so is around $8 per year.

    54% of 41 people found this useful. Was this useful? yes (22) | no (19)
  • Is this fan rated for installation above a shower?

    A. The Delta Electronics VFB25ACH is UL and cUL listed for tub/shower enclosure when used with GFCI branch circuit wiring.

    50% of 12 people found this useful. Was this useful? yes (6) | no (6)
  • what is cfm/ what is somes?

    A. Thank you for your question. CFM stands for "Cubic Feet per Minute" and is a measurement of how much air this product moves. Sones are a measurement of sound, this particular product is very quiet.

    56% of 9 people found this useful. Was this useful? yes (5) | no (4)
  • Does this fan, the Delta Electronics VFB25ACH, need a special switch?

    A. The Delta Electronics VFB25ACH will work with a standard light switch.

    50% of 14 people found this useful. Was this useful? yes (7) | no (7)
  • Can you adjust the humidity level at which the fan turns itself on?

    A. The Delta Electronics VFB25ACH is pre-programmed and will run at humidity levels higher than 50%. (Early models were pre-set at 40%.)When they are lower than that, the fan runs slower.

    38% of 13 people found this useful. Was this useful? yes (5) | no (8)
  • do you need to have a switch?

    A. Yes, it is highly recomended that you use a switch. This has more than one setting and to be able to use this effeciently and to it's full capacity, you must use a switch.

    55% of 11 people found this useful. Was this useful? yes (6) | no (5)
  • Does the Humidity sensor adjustable or it fix.

    A. The Delta Electronics VFB25ACH is not adjustable. It is fixed to actuate the fan at 50% or higher relative humidity. (Note: Early models were pre-set at 40%.)

    42% of 12 people found this useful. Was this useful? yes (5) | no (7)
  • Does the Delta VFB25ACH fan have a built-in damper?

    A. The Delta Electronics VFB25ACH does have a built in back draft damper.

    33% of 6 people found this useful. Was this useful? yes (2) | no (4)
  • Is the fan supposed to run continuously when it's on the humidity sensing setting? I installed the fan this past weekend, and it doesn't shut off unless I turn it off.

    A. The Delta Electronics VFB25ACH is pre-set to run when the humidity is higher than 50%. (Note: Early models were pre-set at 40%.) You can also turn it on and off manually by toggling the wall switch.

    29% of 7 people found this useful. Was this useful? yes (2) | no (5)
  • Can Delta Breeze be installed on wall?

    A. The Delta Electronics VFB25ACH is designed for ceiling installations only.

    50% of 8 people found this useful. Was this useful? yes (4) | no (4)

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Warranty Info


Delta Electronics Inc. ("Delta Electronics") warrants to that the Breez ventilation fan products will be free from defects in material or workmanship. This warranty is limited to three (3) years from the original date of purchase.

Limitations and Exclusions

1. During the warranty period, a replacement for any defective product will be supplied free
of charge for installation by the consumer. The warranty provided herein does not cover
charges for labor or other costs incurred in the troubleshooting, repair, removal, and
installation service.

2. All returns of defective parts or products must include the product model number, and
must be made through an authorized Delta Electronics distributor. Authorized returns
must be shipped prepaid. Repaired or replacement products will be shipped by Delta
Electronics F.O.B. shipping point.

3. Delta Electronics shall not be liable for any indirect, incidental, consequential, punitive, or special damages arising out of or in connection with products use or performance,
regardless of the form of action whether in contract, tort (including negligence), strict
product liability or otherwise.

4. This warranty does not extend to fluorescent lamp starters and tubes.

5. The warranty does not cover if user does not comply with manufacturers installation

6. To qualify for warranty service, you must notify Delta Electronics at the address or
telephone number below.

7. Delta Electronics shall have no liability to the original owner-user with respect to any
defect caused by abuse, misuse, neglect, improper transportation or storage, improper
testing, improper installation, improper operation, improper use, improper maintenance,
improper repair, improper alteration, improper modification, tampering or accident of
products or parts thereof, or unusual deterioration or degradation of products or parts
thereof due to a physical environment beyond the requirements of products'


Delta Electronics, Incorporated
4405 Cushing Parkway
Fremont, CA 94538

US Toll Free Number: 1-888-979-9889

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