1 week ago

Hart-Hammer, Inc.

If you will soon need to replace Water Source Heat Pumps in your facility, do yourself a favor and consider AAON. With many long anticipated features like Bottom Side Access, these units are an excellent choice! ... See MoreSee Less

If you will soon need to replace Water Source Heat Pumps in your facility, do yourself a favor and consider AAON. With many long anticipated features like Bottom Side Access, these units are an excellent choice!

3 weeks ago

Hart-Hammer, Inc.

Go Garcia!! This has always been Hart Hammer's mantra instilled in us by Pat Hart. Give us an opportunity and we will succeed!

The book summary reads "Message to Garcia has carried its simple message of hard work, integrity and dependability to readers around the world for over 100 years. One of the keystones of American self-improvement literature, this short celebration of the diligence and loyalty shown by one man is truly a life-changing classic that demands to be read again and again."
... See MoreSee Less

Go Garcia!!  This has always been Hart Hammers mantra instilled in us by Pat Hart.  Give us an opportunity and we will succeed!

The book summary reads Message to Garcia has carried its simple message of hard work, integrity and dependability to readers around the world for over 100 years. One of the keystones of American self-improvement literature, this short celebration of the diligence and loyalty shown by one man is truly a life-changing classic that demands to be read again and again.

1 month ago

Hart-Hammer, Inc.

The unnecessary cost of designing for low cross leakage

Efforts to design for an exhaust air transfer ratio (EATR) of 0% frequently increase energy costs without providing any meaningful improvement in IAQ. In most applications, the optimal EATR selection point for energy recovery wheels is in the range of 2-4% - a rate that balances the tradeoffs between IAQ, energy costs, and installation costs.

Understanding these tradeoffs allows engineers, equipment manufacturers, and building operators the most flexibility to meet building performance objectives over a wide range of operating conditions.

Airxchange engineer Samantha Alleva presents the tradeoffs in a peer reviewed article published in the November, 2017 issue of ASHRAE Journal.

Read the full ASHRAE Journal Article as a .pdf file - no registration required - www.airxchange.com/Collateral/Documents/English-US/ASHRAE_Journal_EATR_Alleva_Nov2019_dist.pdf
... See MoreSee Less

The unnecessary cost of designing for low cross leakage

Efforts to design for an exhaust air transfer ratio (EATR) of 0% frequently increase energy costs without providing any meaningful improvement in IAQ. In most applications, the optimal EATR selection point for energy recovery wheels is in the range of 2-4% - a rate that balances the tradeoffs between IAQ, energy costs, and installation costs.

Understanding these tradeoffs allows engineers, equipment manufacturers, and building operators the most flexibility to meet building performance objectives over a wide range of operating conditions.

Airxchange engineer Samantha Alleva presents the tradeoffs in a peer reviewed article published in the November, 2017 issue of ASHRAE Journal.

Read the full ASHRAE Journal Article as a .pdf file - no registration required - http://www.airxchange.com/Collateral/Documents/English-US/ASHRAE_Journal_EATR_Alleva_Nov2019_dist.pdfImage attachment
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