Brivis Evaporator Fan Vibrating Machine
Brivis Evaporator Fan Vibrating Chair

POST a QUESTION or COMMENT about air conditioning or heat pump system equipment or control or ductwork noises: cause, significance, cure

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

I have a Brivis ducted evap unit with 8 outlets and I find it next to useless. I've tried experimenting using it in different ways but it just doesn't seem to give me relief from the heat. I've tried fan down low, fan up high, multiple rooms with windows open, windows only open in room I'm in, hoping for that pressure effect. BRIVIS MOTOR VIBRATION MOUNT (SET OF 4) VM. Vibration mount - Set of 4 (as required in each unit) price (inc GST) $56.00. BRIVIS MOTOR MOUNTING. INCLUDES MOTOR, 10 BLADE V/P FAN WITH GREEN HUB & COLLET. Price (inc GST) $999.00. TURBO / AXIAL MOTOR - V/S 425W MCE425. The vibration levels at the blade-pass frequency is to be measured at the fan shroud or stack. These CTI vibration standards are given for each major type of tower construction: concrete, metal, wood & fiberglass. All CTI standards are expressed in units of displacement (mills-pk-pk).

Brivis Evaporator Fan Vibrating Machine

Air conditioner or heat pump noise diagnosis & cure:

HVAC systems can produce a stunning range of noises many of which can help lead quickly to the trouble source and thus can help tell us what repair is needed.

This air conditioning repair article discusses the diagnosis and repair of air conditioning compressor noises which range in importance from normal (if annoying squeaks and squeals, to rattling loose bolts and hardware, to shrieking and howling or death-rattles that sometimes (not always) presage costly compressor damage indicating air conditioning compressor or A/C compressors at or near end of their life.

We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

A/C & Heat Pump System Noise Diagnosis & Repair Noises: How to Diagnose Air Conditioner Compressor, Fan, Refrigerant Piping, Ductwork Noises

In the A/C system noise diagnosis article below we discuss how we approach listening to and interpreting noises coming from an air conditioning or heat pump system.

Topics: how to diagnose & repair noises or sounds traced to HVAC systems including compressor/condenser units, air handler units, air conditioners, heat pumps, furnaces, ductwork, motors & controls. Recordings of HVAC system noises.

Categories of sound by HVAC system sound type & what the sound significes.

Article Series Contents

NOISES, HVAC SYSTEM DIAGNOSIS - home
NOISES, HVAC SOUND DESCRIPTIONS - Five groups of HVAC sounds, listed alphabetically from Banging to WuWuWu help track down the noise source & suggest repairs
- HVAC NOISE-1 BANG BUZZ VIBRATE - banging, bearings, buzzing
- HVAC NOISE-2 CHATTER CLANK FAN GROAN - chattering, clanks, clunks, cyclical, fan, groans, growls, honking
- HVAC NOISE-3 HISS HOWL HUFF HUM - hiss, howl, huff, hum, groan, woo wuu wuff or humming noises
- HVAC NOISE-4 POP, RATTLE, ROAR, RUMBLE - loud start, popping, rattling, roaring, rumbling, running water
- HVAC NOISE-5 SCREAM SING TRUMPET WHINE WUWU - scream, sing, squeal, trumpet, water gurgling, whine, whistling, wuwuwu
- HVAC SYSTEM NOISE DIAGNOSIS FAQs - questions & answers about HVACR noise diagnosis & cure
- NOISES, HVAC SOUND RECORDINGS - recordings & video examples of HVAC system noises
NOISE / SOUND DIAGNOSIS & CURE - home

This article discusses how to diagnose & repair air conditioning compressor noises from the compressor/condenser, air handler, duct work, filters, or controls

Diagnose & repair air conditioning system noises: compressor, fans, air handler, ductwork, Recordings of air conditioner or heat pump noises & sounds
Air conditioner buzzing may be just a loose part
Air conditioner humming, clanking, buzzing noises can indicate a minor or a serious problem - it depends ...
AIr conditioner or heat pump noises may diagnose lost cooling capacity
Air conditioner or heat pump noises may predict equipment damage
Recordings of A/C or Heat Pump Sounds & Noises: Submit, Listen-to, or Comment on These Sounds

If your air conditioning or heat pump system has lost its cooling capacity or won't start
see REPAIR GUIDE for AIR CONDITIONERS.

See HOW to DETERMINE COOLING CAPACITY of air conditioning equipment if the system seems to be working but is inadequate to cool your building. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.

First question in diagnosing HVAC system noises is where are the noises coming from?:

Ductwork noises: sounds originate in the ductwork, or may be conducted via ductwork from another source, including noise sources not necessarily having anything to do with the air conditioning or heat pump equipment itself.
See DUCT SYSTEM NOISES
and DUCT VIBRATION DAMPENERS
and SOUND CONTROL for AIR DUCTS, HVAC
Indoor Air Handler Noises: sounds are coming from the air handler/cooling or 'blower' unit located indoors.
See AIR HANDLER & DUCTWORK NOISE DIAGNOSIS just below.
Indoor Air Conditioner/Heat Pump Noises from a Wall Mounted Split System Unit are discussed at How to Diagnose Noises
at SPLIT SYSTEM Air Conditioner / Heat Pump Indoor Wall-Mounted Unit Noises later in this article.
Outdoor A/C or Heat Pump Noises: are the sounds from the compressor/condenser unit located outdoors,
see NOISES AT THE COMPRESSOR/CONDENSER & CONDENSER FAN UNIT
Other noises: is the noise somewhere else and perhaps from another source having nothing to do with the HVAC system?

Second question in diagnosing air conditioner or heat pump noises & sounds: what does the noise sound like?

See our CATALOG OF AIR CONDITIONER & HEAT PUMP NOISES by Description of the Sound in the article below

Air Handler & Ductwork Noise Diagnosis & Cure for HVAC Systems

Air handler / blower indoor cooling unit noises: see air leaks, bubbling, clicking, duct noises, fan noises and vibration dampener noises and the articles on these problems listed just below.
Air leaks in ductwork often make a roaring or hissing sound.
See LEAKY DUCT CONNECTIONS and
also
see VIBRATION DAMPENERS for a discussion of devices used to isolate noises produced by HVAC air handlers such as air conditioners and furnaces.
Hissing that continues for a time then stops may be due to a refrigerant leak or due to an emergency overpressure relief valve on the refrigerant system.
See HISSING SOUNDS, HVAC from A/C or heat pump system
Banging, clanking HVAC systems -
see BANGING A/C or HEAT PUMP
and
see COMPRESSOR CONDENSER NOISE
and see BANGING NOISE at AIR HANDLERS or in DUCT SYSTEMS
and see BANGING HEATING SYSTEM NOISES - complete list
Bubbling or hissing in the refrigerant piping is discussed
at REFRIGERANT LEAK REPAIR
and
at WATER SOUNDS IN HVAC PIPINGsounds in HVAC refrigerant piping or coils
Buzzing sounds (also crackling) at electrical components anywhere, including compressor relay switches, electrical connections at any component, and quite seriously, at circuit breakers can be an indication of arcing and an electrical problem needing prompt attention.
See BUZZING sounds from A/C or heat pump.
Also
see ELECTRICAL SYSTEM NOISES.
Also
see CHATTERING RELAY CONTROL SWITCHES as buzzing and chattering can be confounded
Chattering noises: in relays or switches; see CHATTERING RELAYS, HVAC EQUIPMENT
Or see CHATTERING RELAY CONTROL SWITCHES
Also see FAN NOISES, HVAC as ticking and chattering may be traced to a fan problem.
Clicking noises from relays & controls can be heard at either the compressor/condenser