Custom Air Handling Unit Design Critical Decisions

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The design of an air handling unit is a major decision and is a complex and sophisticated activity but here are the critical design decisions when designing a custom AHU.
Enclosure Construction

  • Structural Capacity and Air Tightness
    1/200th of the span deflection and less then 1% casing leakage at 1.5 times the total of the unit static pressure profile
  • Corrosion Resistance/Unit Life Span
    Aluminum or ThermoComposite – 30+ year life
    Galvanized Steel – 10-15 year life before major repairs may be required
  • Rigid Foam vs Fibrous Batt Insulation
    Foam provides significant strength, rigidity and air leakage control vs batt insulation at minimal or no added cost

Component Velocities (minimum velocities apply in VAV systems)

  • Recommended Velocities For Optimum Performance and Energy Use
  • Cooling Coils 450 fpm max, 250 fpm min
  • Heating Coils 800 fpm max, 250 fpm min
  • Media Filters 350 fpm, 150 fpm min
  • Steam Humidifiers 800 fpm, 350 fpm

Use of Air to Air Energy Recovery

Indoor Air Quaility

  • Level of Filtration
  • Odor Control

Sound Control

  • Does system require interior acoustical treatment or sound attenuators

Type of Fans

  • Fan Array vs individual fans
  • N+1 fan redundancy
  • AC motors w/ VFD’s vs ECM Fans

General

  • Component removal and service
For More Information - askRick

 

 

COVID-19: Testing shows 99.4% Inactivated by Needlepoint Bipolar Ionization

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Testing is in –  Needlepoint Bipolar Ionization Inactivates COVID-19! 

This is great news for our HVAC community.  This technology can be easily added to most HVAC systems quickly and at a very reasonable cost.

It has taken a while for the testing because the SARS-CoV-2 (the virus that causes COVID-19) virus samples have not been available.  We had tested other virus types with great success and had suspected the same result against the most current pathogen.  We are now able to share that third party testing shows that Needlepoint Bipolar Ionization inactivates 99.4% of SARS-CoV-2 in 30 minutes.  These are very, very good results!

Complete Report:  COVID-19 – Needlepoint Bipolar Ionization – Test Results

Is it safe?

Bipolar ionization has been around for decades. This technology will not generate anything that is not already prevalent in the atmosphere.  Ions are healthy and they are abundant in normal, outdoor environments.  The older style of ion generators used perishable glass/composite tubes and would also create potentially harmful ozone during the process.  A newer technology uses Needlepoint modules to develop bipolar ionization.  They were developed in the mid-2000’s and do not create harmful levels of ozone.  Needlepoint technology has been tested in accordance with UL 2998, which limits ozone to 0.005 parts per million (5PPB) by volume.  These systems are safe for indoor environments.

Is it cost effective to Install?

Needlepoint bipolar ionization (NBPI) can be installed in existing or new HVAC equipment. This type of technology is a simple addition to most any HVAC system. You can also have it done when you’re in need of air filtration repair. It does not involve increasing system pressure, adding fans, up sizing filters, or making large changes to air handlers or duct work.  In most cases, NBPI can be simply attached on the entering side of a cooling coil. NBPI products require little maintenance and most require no replacement parts. NBPI products are typically designed to last the life of the associated air handling system.

Please contact us to discuss designing your system using Needlepoint Bipolar Ionization (NBPI).

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

Needlepoint Bipolar Ionization (NBPI) brings back Univ. of Wisconsin Teams

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University of Wisconsin –  Upgrades AHU’s with Needlepoint Bipolar Ionization (NBPI)

UW football players are returning to campus this week on a voluntary basis. (Photo: Adam Wesley/USA TODAY NETWORK-Wis)

The University of Wisconsin will welcome a limited number of athletes back to campus this week, with voluntary strength and conditioning activities to begin June 15.

The plan includes the voluntary return for members of the football and volleyball teams for health assessments and COVID-19 testing. Next week’s strength and conditioning activities will all take place in the Forward Center inside Camp Randall Stadium and in the weight room at the McClain Center. Other facilities, including the Kohl Center, will remain closed.

The number of athletes inside each room will be restricted to mitigate risk of spreading COVID-19. Athletes will be screened daily (including a temperature check) before entering the facilities.

Athletes will be briefed on full health procedures, and each athlete must undergo nasal-swab testing for the virus. If they develop symptoms or believe they have come into contact with someone who has tested positive, they will be swabbed again.

The athletes will be required to wear masks except during conditioning activities. Those with suspected symptoms will be instructed to self-isolate while awaiting test results, and they’ll be required to sit out for 72 hours after receiving a negative result.

An individual testing positive must be symptom-free for 72 hours before receiving a repeat COVID-19 test. Upon receipt of a negative result and follow-up exam, the athlete can return to gradual participation once cleared by a team physician.

Needlepoint Bipolar Ionization (NBPI) added by Global Plasma Solutions

UW said it was installing Global Plasma Solutions bi-polar ionization units to air-handling units in its facilities, employing a process that helps kill viruses in the environment. The university is also ramping up cleaning procedures.

Members of the basketball team will return later in June, followed by hockey teams. Additional athletes will return for voluntary workouts as the summer progresses, provided all goes well.

“We have been working for several weeks on a carefully-constructed plan to begin welcoming our student-athletes and selected staff members back to campus,” UW athletic director Barry Alvarez said in a UW release. “We’re very happy to be able to take this step forward, but very cognizant of the need to take great care that our people remain safe. I want to thank our staff, the medical professionals we have worked with and our campus leadership for their efforts in helping us.”

Story by:  JR Radcliffe, Milwaukee Journal Sentinel.  Published 2:32 p.m. CT June 8, 2020 | Updated 2:43 p.m. CT June 8, 2020

Please contact us to discuss designing your system using Needlepoint Bipolar Ionization (NBPI).

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

Needlepoint Bipolar Ionization (NBPI) Increases Filter Efficiency to Fight COVID-19

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How to save on expensive cost of up-sizing filters  

Needlepoint Bipolar Ionization technology produces positive and negative ions that travel with the supply air into the space. In the space, these ions cause particles like dust, dander, pollen, bacteria and virus to attract and stick together (agglomeration). This action significantly increases the effectiveness of existing filters. MERV 8 + GPS = MERV 13.
Our cutting-edge рrосеѕѕ is a tесhnоlоgу thаt uѕеѕ needlepoint bipolar іоnіzаtіоn. Whеn аррlіеd tо hеаtіng аnd сооlіng units, thе іnnоvаtіоn dеlіvеrѕ many unique bеnеfіtѕ thаt are rеlеvаnt to еnd-uѕеrѕ. Fіrѕt, thе technology lіmіtѕ the flow оf оutѕіdе аіr. Whеn outside аіr еntеrѕ a building, thе vеntіlаtіоn system іѕ ѕuѕсерtіblе tо thе grоwth оf microorganisms.

 

Easy to Install

Needlepoint bipolar ionization (NBPI) can be installed in existing or new HVAC equipment. This type of technology is a simple addition to most any HVAC system, you can request it when you first get ac services. You can also have it done when you are in need of air filtration repair. It does not involve increasing system pressure, adding fans, up-sizing filters, or making large changes to air handlers or duct work.  In most cases, NBPI can be simply attached on the entering side of a cooling coil. NBPI products require little maintenance and most require no replacement parts. NBPI products are typically designed to last the lifetime of the associated air handling system.

Air ԛuаlіtу is a major соnсеrn not оnlу fоr business оwnеrѕ but thе реорlе they еmрlоу аnd thе сuѕtоmеrѕ thаt frequent fасіlіtіеѕ аѕ wеll. Evеrу buѕіnеѕѕ is unіԛuе which іѕ whу bipolar ionization through nееdlероіnt is a capability wоrth соnѕіdеrіng.

Please contact us to discuss designing your system using Needlepoint Bipolar Ionization (NBPI).

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

COVID-19: Creating a Safer Workplace with cleaning services Miami

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How Does COVID-19 Spread?

It is extremely important to understand how the COVID-19 virus is spread.  What we know is that this is an extremely small virus.  It is about 0.12 microns which is tiny (a human hair is 50-70 microns).  Being this small, the virus doesn’t travel well by itself. There are three ways that people get infected.

Droplets  When an infected person coughs, sneezes, or talks, droplets with the virus fly into the air from their nose or mouth.   Anyone who is within 6 feet of that person can breathe those droplets into their lungs. These droplets do not stay in the air. They fall to surfaces.

Aerosolized transmission  Research shows that the virus can live in the air for up to 3 hours.  At 0.12 microns, the virus just floats around in the air.  The smaller the size, the longer it stays airborne.  When you breathe air that has the virus floating in it, the virus can travel deep into your lungs.

Surface transmission   You can also catch COVID-19 by touching surfaces such as counter tops or doorknobs which have been coughed or sneezed on by someone who has the virus and then touching your nose, mouth, or eyes. The virus can live on surfaces like plastic and stainless steel for 2 to 3 days. To stop surface transmission, surfaces must be cleaned thoroughly.

How can HVAC systems reduce the spread of COVID-19?

An HVAC Solution: Needlepoint BiPolar Ionization (NBPI)

A reasonable solution to this problem would be to add something to the supply air delivered to the space which would inactivate aerosolized and surface virus.  This additive needs to be safe for humans and added at a reasonable system cost. That would be a great solution if you use the best services like cleaning by spotless florida.

Bipolar Ionization of Air

As crazy as it sounds, this solution is already available.  Ionization of air has been around since 1879.  Actually, it’s been around since the beginning of time.  Ionization of air occurs naturally in our world and is strongest around crashing ocean waves, waterfalls, mountains and electrical storms (the freshest air available).  There are manufacturers that provide products that that can cost effectively add ions (both negative and positive) to supply air.  These products have been tested, proven and made available in the HVAC market for over 20 years. They have not gained wide acceptance because building owners have not been motivated to use them. They provide fresh, clean air which has not been a priority for most buildings.   Until now, buildings were designed for comfort, cooling and heating and not necessarily for indoor air quality or to protect the occupants in the building.  This has now changed. Today, that is what we need.

How does Bipolar Ionization work?

Bipolar Ionization starts at the air handling unit where millions of ions per second (positive and negative) are produced and then travel through the duct work and into all building spaces.  In the space, these ions provide two key functions; particle reduction and pathogen reduction.

Particle Reduction

Let’s say a person sneezes in a space.  At that point, millions upon millions of virus particles are launched into the air where they will remain for a long time.  Because COVID-19 is so small, the virus particles will not be swept along in normal air currents.  They will stay suspended in the space environment for up to 3 hours.  The positive and negative ions that are generated with Bipolar Ionization technology travel with the supply air into the space.  In the space, the positive and negative charged ions release their charge to particles (like dust, dander, pollen, bacteria and virus).  Those particles in turn seek out oppositely charged particles and stick together (agglomeration).   Through particle agglomeration, they start sticking together and growing larger.  As they gain more and more surface area, the particles become large enough to be moved by the airflow back to the filter.  They are captured and retained in the filter at the air handling unit.  Since both polarities of ions are created, particles are not attracted to objects in the space and the overall net static charge is neutral.

Pathogen Reduction

Bipolar ionization injected into the air attacks and inactivates viruses and kills mold spores and bacteria. With living organisms like mold spores and bacteria, the ions steal away hydrogen from the pathogens, leaving them to die.  If it is a virus like COVID-19, it is not a living organism and it is not going to have hydrogen in it.  In this case, the ions produce a chemical reaction on the cell membrane surface that inactivates the virus destroying its ability to reproduce.  Bipolar ionization can reduce 99.9% of microbes in a matter of minutes.  This pathogen fight takes place in both air and on surfaces, within the space (not just in the air handling unit).  Another huge advantage is that bipolar ionization purifies the space on a continuous basis, not just during application (like chemical disinfectants or even portable UVC systems).

Is it safe?

Bipolar ionization has been around for decades. This technology will not generate anything that is not already prevalent in the atmosphere.  Ions are healthy and they are abundant in normal, outdoor environments.  The older style of ion generators used perishable glass/composite tubes and would also create potentially harmful ozone during the process.  A newer technology uses Needlepoint modules to develop bipolar ionization.  They were developed in the mid-2000’s and do not create harmful levels of ozone.  Needlepoint technology has been tested in accordance with UL 2998, which limits ozone to 0.005 parts per million (5PPB) by volume.  These systems are safe for indoor environments.

Is it cost effective to Install?

Needlepoint bipolar ionization (NBPI) can be installed in existing or new HVAC equipment. This type of technology is a simple addition to most any HVAC system. You can also have it done when you’re in need of air filtration repair. It does not involve increasing system pressure, adding fans, up sizing filters, or making large changes to air handlers or duct work.  In most cases, NBPI can be simply attached on the entering side of a cooling coil. NBPI products require little maintenance and most require no replacement parts. NBPI products are typically designed to last the life of the associated air handling system.

Please contact us to discuss designing your system using Needlepoint Bipolar Ionization (NBPI).

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

Reducing Spread of COVID-19 with HVAC System Retrofit

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Using GPS Needlepoint Bipolar Ionization to Retrofit and Upgrade Existing HVAC System

The challenge for reducing the spread of COVID-19 has two categories. One of them is our daily behavior which includes social distancing, wearing masks, cleaning, and sanitation as recommended by CDC. The other category is office lay out, occupant flow and HVAC improvements.

For years, there have been known proven methods for cleaning the supply air. There is a difference between providing cleaner air to the space and eliminating the pathogens from the contaminated environment.

To reduce the pathogens from the air supply through the HVAC system and thus reducing the spread of pathogens, we recommend Bipolar Ionization provided by Global Plasma Solutions.

Bipolar Ionization has been used for clean rooms and health care facilities for many years. It is relatively simple concept and can be applied to traditional ducted systems. Producing a natural bio-climate rich in positive and negative oxygen ions will help neutralizing the particles. The negative ions contain an extra electron while the positive ions are missing an electron resulting in an unstable condition. In an effort to restabilize, these bipolar ions seek out atoms and molecules in the air to trade electrons with, effectively neutralizing particulate matter, bacteria and virus cells, odorous gases and aerosols, and VOCs.
Read complete article

Please contact us to discuss designing your system using GPS bipolar ionization technology.

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

DAC Proudly Representing Global Plasma Solutions (GPS) in the Fight Against COVID-19

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Used in large-scale ventilation systems worldwide, bipolar ionization could be a secret weapon in the war against COVID-19

  • Bipolar ionization technology releases charged atoms that attach to and deactivate harmful substances like bacteria, mold, allergens, and viruses.
  • It first arrived in the US in the 1970s as a tool to control pathogens in food manufacturing.
  • Bipolar ionization has already proven effective against SARS, norovirus, and several influenza strains.
    Read more

 

Please contact us to discuss designing your system using GPS bipolar ionization technology.

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

Global Plasma Solutions (GPS) Bipolar Ionization Destroys Viruses

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GPS’ Bipolar Ionization Destroys Viruses

Especially during times like these, we are excited to represent Global Plasma Solutions, a leader in bipolar ionization. GPS features technology that destroys viruses!

John Oxford is UK’s top expert on influenza and Emeritus Professor of Virology at the University of London.  His work on the 1918 strain of influenza (Spanish flue) is world famous.

In the following video, he discusses how bi-polar ionization technology destroys viruses:

Please contact us to discuss designing your system using GPS bipolar ionization technology.

Featured Manufacturer:
Global Plasma Solutions

For More Information - askRick

 

Annexair Unveils First Ever Biocomposite Ventilation Unit

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Recycled plastic water bottles promotes sustainable air conditioning!

Annexair has unveiled a brand-new eco-friendly ventilation system: a Biocomposite central air unit made of recycled plastic water bottles!

The Biocomposite unit was unveiled during the Expo AHR in Orlando, Florida, and will be competitively priced on the HVAC market. This new product was thoughtfully designed in-house after seven years of R&D and provides many benefits to commercial building owners who care about the environment:

  • Operating this unit would reduce the greenhouse gas effect by about 85% compared to conventional steel units;
  • Not only is it 100% recyclable and good for the environment, this Biocomposite casing does not require any metal components;
  • The Biocomposite resin is fire-resistant, has no impact on the environment nor on the human health;
  • The Biocomposite casing consumes less energy, is sustainable and fully resistant to corrosion and rust;
  • As the casing is 50% to 60% lighter than conventional units, it means less weight on building structures and during transportation;
  • The unit should generally last 50 to 60 years, and even longer if well maintained;

“The year 2020 is pivotal for the Annexair team and also for our entire industry,” said François Lemieux, Annexair president. “We can no longer ignore the devastating effects of climate change. That’s why we believe in a renewed business model that can meet the requirements of the North American market.”

The experts at Annexair reckon that in one year they would recover approximately 30 million recycled plastic bottles for the assembly of their units. In order to meet their business objectives in terms of sustainability, Annexair will also halt production of their steel HVAC units in 2021. The new unit, produced in Drummondville, Canada, will be available starting August 2020.

Read more about building with biocomposites

Please contact us to discuss designing your system using Biocomposite technology.

Featured Manufacturer:
Annexair

For More Information - askRick

 

Project Snapshot: Alkermes

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Project Name: Alkermes
 Architect: Elkus Manfredi Archtects
Mechanical Engineer: AHA Consulting Engineers
Mechanical Contractor: Hamel & McAlister
Equipment: (2) Custom Penthouse AHUs, (2) EAHUs, (1) Konvekta Heat Recovery Skid (6) MK Plastics High Plume Dilution Fans, (2) 450 ton Oil-Free Chillers
Manufacturer: Konvekta, Cambridgeport, MK Plastics, Smardt, Ingenia
Size: 140,000 CFM Supply / 140,000 CFM Exhaust
DAC Sales Engineer: Matt Tefft

Project Overview

Alkermes, a global bio-pharmaceutical company, develops products that are designed to make a meaningful difference in the way patients manage disease.  Experiencing tremendous growth, Alkermes constructed a new 220,000 square foot, office-to-lab conversion core/shell building at 900 Winter Street as an expansion to their current facility within the Reservoir Woods at 852 Winter Street.

Solution

In order to house base building mechanical equipment to support laboratory space demands, the custom supply AHUs by Cambridgeport were provided with equipment vestibules to support base building mechanical needs.  The (2) large vestibules are housing the Konvekta energy recovery skid, main chilled water piping, energy recovery piping, expansion tanks, air separators, chilled water pumps and VFDs. By integrating the mechanical space into the rooftop custom AHU vestibules, the building is able to maximize the square footage for usable space.

Project Highlights

Konvekta:

  • The Konvekta pumped glycol energy recovery system provides variable flow pumped glycol energy recovery between the 100% OA and 100% exhaust air-streams, treating 140,000 CFM of supply air and 140,000 CFM of exhaust air. The coils are manufactured specifically for efficiency and turn-down.  The system will be remotely monitored for performance and guarantees energy recovery performance to the owner.  When energy recovery alone is not enough to meet supply unit temp setpoint requirements, heat (one boiler installation is complete, via boiler hot water) is injected into the glycol ER loop via plate / frame heat exchangers enabling the energy recovery coil to provide both heating and energy recovery functionality. This means, no hot water coil required in the AHU or any branch HW piping to the AHUs.  Konvekta will provide reports to the owner on how the system performed for proof of performance.

 

 

Smardt: (2) 450-ton custom / oil free air-cooled chillers are on the roof.  These chillers include:

  • (4) Magnetic bearing (Turbocor) compressors
  • Integral free cooling and low ambient kit, down to -40°F ambient operation. When cold enough outside, the chillers provide cooling during winter months without the need to operate compressors.  This means no need for separate fluid coolers that require additional piping, controls and roof space.
  • Low noise condenser fans with inlet and outlet attenuation
  • Custom electrical layout: Dual points of power to provide flexibility in generator sizing during emergency scenarios. Free cooling and a portion of mechanical cooling will be available power outage to provide cooling needs to critical spaces at lower power consumption rates than single point of power would provide
  • Industry leading efficiency, especially at part loads
  • No oil!

Cambridgeport:

  • Custom AHUs and large equipment vestibules
  • EC fan arrays

 

 

 

 

 

MK Plastics:

  • High plume dilution lab exhaust fans
  • Direct drive, arrangement #4
  • Motors are down low at roof level for ease of serviceability
  • High nozzle velocities to create a safe plume which allows for a large range of fan turndown before needing any bypass air as per ANSI Z9.5. (3,000 FPM min velocity required).

 

Ingenia:

  • Custom recirculation AHU serving a clean room for the biologics suite
  • Custom feature included anti-microbial powder coat interior liner to provide the ultimate cleanliness, the unit served ceiling installed HEPA filtration

 

Related Manufacturers

Konvekta, Smardt, Cambridgeport, MK Plastics, Ingenia

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