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DriSteem introduces new humidifier

EDEN PRAIRIE, Minnesota, 12 April 2021: DriSteem introduced its RTS humidifier RX series, which it described through a Press release as a compact, elegant, cabinet-style, resistive-to-steam humidifier that is ideal for any application where reliable humidity control is needed.

For added application flexibility, the company said, there are 21 models to choose from, with capacities up to 324 lbs/hr (147 kg/h). In addition, the standard single stage solid state relay (SSR) control allows for a tight range of relative humidity control, keeping it within +/- 1 % RH, the company added.

According to DriSteem, the RX series offers a number of features that make it stand out against other steam humidifiers in the market:

  • Removable front covers with quarter-turn latches that allow easy one-sided access to the tank and electrical connections
  • Large clean-out and heater plate for easy access when cleaning the tank
  • DriSteem’s programmable smart drain and scale management technology, which adjusts drain intervals automatically based on water quality:
    • Removes precipitated minerals from the tank
    • Skimming removes foam and suspended minerals
  • Matching Space Distribution Units that disperse steam with no visible vapor trail (SDU-I-RX)
  • Functionality of Vapor-logic controller with an intuitive touchscreen interface:
    • Start-up wizard for simplified setup; scan QR codes to access product manuals
    • Color-coded alerts to reduce down-time and technical calls
    • Contextual Help link on every screen
    • Standard BACnet connectivity
  • Indoor and outdoor models
  • Wide voltage ranges
  • International approvals
  • EN1717-compliant for protection of potable water supplies from pollution caused by back-flow

“The new RX series,” said Mysty Hanson, DriSteem Product Manager, “offers a next generation breakthrough in our resistive steam humidifiers, with ease of maintenance, installation flexibility, and environmental protection, while continuing DriSteem’s legacy of sustained quality and dependability.”

ASHRAE Epidemic Task Force releases updated Building Readiness Guide

ATLANTA, Georgia, 02 February 2021: With the performance of many HVAC systems in buildings still being evaluated, the ASHRAE Epidemic Task Force has updated its reopening guidance for HVAC systems to help mitigate the transmission of SARS-CoV-2, ASHRAE said through a Press release.

“The Building Readiness Guide includes additional information and clarifications to assist designers and commissioning providers in performing pre- or post-occupancy flush calculations to reduce the time and energy to clear spaces of contaminants between occupancy periods,” said Wade Conlan, Lead, ASHRAE Epidemic Task Force Building Readiness team. “New information includes the theory behind the use of equivalent outdoor air supply, method for calculating the performance of filters and air cleaners in series, and filter droplet nuclei efficiency that help evaluate the systems’ ability to flush the building.”

According to ASHRAE, major updates to the building readiness guidance include the following:

  • Pre- or post-flushing strategy methodology: The strategy has been updated to include the use of filter droplet nuclei efficiency, which is the overall efficiency of filter, based on viable virus particle sizes in the air, to assist in determining the impact of the filter on the recirculated air on the equivalent outdoor air. This allows the filter efficiency as a function of particle size, using ASHRAE Standard 52.2 test results, to be estimated based on the expected size distribution of virus-containing particles in the air. This calculation is currently based on Influenza A data and will be updated as peer-reviewed research becomes available for the distribution of particle sizes that contain a viable SARS-CoV-2 virus. Additionally, a chart has been added to help determine the time to achieve 90%, 95% or 99% contaminant reduction, if the equivalent outdoor air changes per hour is known.
  • Flushing time calculator: There is now a link to a view-only Google Sheet that can be downloaded for use, to help determine the available equivalent outdoor air changes and time to perform the flush. This sheet is based on a typical mixed AHU with filters, cooling coil, with potential for in-AHU air cleaner (UVC is noted in the example), and in-room air cleaning devices. Provided efficiencies of MERV-rated filters are based on the performance of over 200 actual filters from MERV 4 through 16, but the tool also allows users to enter custom characteristics for specific filters.
  • The sheet also calculates the filter droplet nuclei efficiency, based on the cited research but allows a user to adjust the anticipated distribution of virus, as desired. It also allows specification of the zone (room) air distribution effectiveness from ASHRAE Standard 62.1 to account for the impact of the HVAC system air delivery method on the degree of mixing. Default calculations assume perfect mixing. Finally, the tool allows for the target air changes to be adjusted if an owner wants to achieve a different per cent removal in lieu of the recommended 95%. 
  • Heating season guidance: The guide now includes data to consider for heating of outdoor air and the potential impact on pre-heat coils in systems.
  • Adjustments to align with Core Recommendations: The Core Recommendations were released in January 2021, and this guidance document needed to be updated to ensure that the information provided aligned with the intent of those recommendations. This included minimum outdoor air supply and filter efficiency requirements and their role in an equivalent outdoor air supply-based risk mitigation strategy.

According to ASHRAE, the guidance still addresses the tactical commissioning and systems analysis needed to develop a Building Readiness Plan, increased filtration, air cleaning strategies, domestic and plumbing water systems, and overall improvements to a system’s ability to mitigate virus transmission.

DriSteem wins award for its GTS LX Series Humidifier

EDEN PRAIRIE, Minnesota, 16 December 2020: DRI-STEEM Corporation (DriSteem), manufacturer of humidification, evaporative cooling and water treatment products, has received the BUILD Construction & Engineering award for the ‘Best in Commercial Humidification Solution Provider of 2020’ for its GTS LX Series Humidifier.

Making the announcement through a Press release, DriSteem said the Best in Commercial Humidification Solution award is selected by the BUILD Construction & Engineering research team. Those selected met merit-oriented criteria, researched via public domain with many factors taken into consideration, the company said. The nominee proved evidence of expertise within its field, dedication to customer service and client satisfaction with an ongoing commitment to excellence and innovation, the company added.

“We are truly thrilled to receive this prestigious award, five years running,” said Mysty Hanson, Product Manager, DriSteem. “It is always an honor when your work is recognized in the industry as being one of the best.”

According to DriSteem, the GTS LX Series Humidifier is the only gas-fired humidifier that combines the highest efficiency on the market with ultra-low NOx in a single design, thermal combustion efficiency, 94% higher heating value of fuel and 103% lower heating value of fuel. All LX Series humidifiers, the company said, feature new touchscreen displays. The new display, it added, has all the industry-leading functionality of its Vapor-logic controller, with intuitive interface animated graphics, and a Set-up Wizard for easier start-ups.

According to DriSteem, additional LX Series highlights include:

  • Condensing design for highest efficiency and PVC venting.
  • Ultra-low NOx certified to SCAQMD 1146.2 standards.
  • Smart drain technology adjusts drain intervals automatically based on water quality.
  • Universal water control for use with any water type, including RO/DI water.
  • Modulating output with minimum 5:1 turndown for accurate humidity control.
  • Outdoor and indoor models for application flexibility.
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