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PSC vs ECM Motors In Commercial HVAC Systems

Posted by Pete Gagnon on May 16, 2018 11:08:00 AM

ECM Motors = Energy savings and added functionality

ECM motors are providing a variety of benefits to commercial HVAC systems over traditional PSC motors. These motors are used in pumps, fans, and increasingly in compressors and other motor applications. An ECM pump or fan motor is electrically commutated, which means it uses a DC circuit controlled by an internal microprocessor to vary the speed and torque of the motor to match changing system requirements. 

PSC motors, or permanent split capacitor, use non-polarized capacitors and brushes to deliver electricity to the rotating parts. These brushes are known to wear out over time. ECM motors do not use brushes, thereby reducing maintenance and extending service life.

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Topics: Commercial HVAC, ecm motors, psc motors

Museum Air Quality and HVAC Design Part 5: Equipment Location

Posted by Nick Chiarelli on Apr 9, 2018 11:49:07 AM

4 Benefits of Properly Located HVAC EquipmenT

The potential hazards and maintenance efforts associated with poorly located HVAC equipment can be a perpetual battle for facility managers and building maintenance staff.

If HVAC equipment is difficult to access, it is less likely to be properly maintained. Inadequate maintenance leads to component failure, which can be catastrophic in a museum setting.

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Topics: Museum HVAC Design, hvac equipment

Museum Air Quality and HVAC Design Part 4: Economizer Systems

Posted by Nick Chiarelli on Apr 9, 2018 11:48:47 AM

Intro To HVAC Economizer Systems

Every building owner wants a lower energy bill. With museum applications in particular, implementing energy saving measures or selecting HVAC economizer systems first requires a full understanding of the system’s capabilities and potential effects in order to avoid negative impacts to the building, its occupants, and its artifacts. 

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Topics: Museum HVAC Design, hvac economizer

Museum Air Quality and HVAC Design Part 3: Condensation Prevention

Posted by Nick Chiarelli on Apr 9, 2018 11:48:25 AM

HVAC Equipment and Tricks For Condensation Prevention

HVAC design for museums in cold weather climates often requires an attention to detail that's typically not necessary when humidification is not a factor.

Because cold, dry, outdoor air must be heated and humidified prior to discharging into the gallery space, and because exterior windows and mullions have the potential to get colder than the space dew point, special care needs to be taken to ensure that condensation does not form on these elements.

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Topics: Museum HVAC Design, hvac condensation, hvac equipment

Museum Air Quality and HVAC Design Part 2: Filtration

Posted by Nick Chiarelli on Apr 9, 2018 11:48:06 AM

HVAC Design Considerations for effective and Versatile Filter Performance

The presence of airborne pollutants, both particulates and gases, can be damaging to any museum collection or exhibit. Particles in the form of dirt, skin, salt, hair, etc., can rapidly collect on artifacts and display spaces if not properly managed.

Once this layer of dust forms, it makes an easy meal for small organisms and bugs, which can then lead to mice and other rodents. All of these are unwelcome guests in a museum, as their feeding activity and presence alone will assuredly cause damage to sensitive materials. 

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Topics: Museum HVAC Design, hvac filtration

Precious Art:  Museum Air Quality and HVAC Design Considerations

Posted by Nick Chiarelli on Apr 9, 2018 11:47:43 AM

KEY Factors FoR High Performance HVAC Design

When it comes to museum galleries, nothing is more important than ensuring the longevity of the precious artifacts located within. One of the most important aspects in preserving the integrity of special collections is the indoor air quality provided by the HVAC system.

Striking a careful balance between performance expectations, ambient weather conditions, and proper HVAC design will help to ensure that museum air quality meets the requirements of the specific artifacts in each gallery.

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Topics: Museum HVAC Design

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