PHFA – Pennsylvania Housing Finance Authority

Pennsylvanie Housing Finance Authority

PHFA - Pennsylvania Housing Finance Authority

Project: Passive House & LEED Platinum Historical Renovation and Tower Expansion.

Quick Facts:

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USA

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2019

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Harrisburg, PA

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Murray Associates

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RFS

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PHFA

Goal:

To accommodate growth, the Pennsylvania Housing Finance Authority (PHFA) renovated their headquarters and added a new 8-story tower. As a proponent for buildings constructed to the Passive House concept, it is fitting that PHFA chose to design the project to meet PHIUS Passive House requirements.

Requirement:

The Passive House consultant sought to provide ventilation meet local code requirements, using air handlers with energy recovery meeting Passive House Institute requirements for:

high heat recovery effectiveness
high electrical efficiency
low casing leakage
low cross-contamination
self-balancing control

Solution:

Continuous ventilation is provided by 2 Passive House Institute certified Swegon GOLD RX air handling units with rotary heat recovery exchangers. Heating season supply air is tempered by the rotors. Hot and humid outdoor air in the summertime is tempered first by the rotors, then cooled further by integral direct-expansion (DX) coils and wrap-around heat pipes. The DX coils are connected to the buildings Variable Refrigerant Flow (VRF) system, and provide a second stage of cooling. Swegon’s IQ Logic controllers activate this second stage of cooling only as required to meet the supply air temperature setpoint. This prevents unnecessary mechanical cooling when outdoor air conditions permit.

Solution:

Location	Size	Airflow (CFM)	Electrical efficiency (W/CFM)	Heat recovery efficiency (%)
Roof	50	4400	0.49	84
Mechanical Room	25	2400	0.51	84

Outdoors and on the roof, a size 50 delivers 4400 CFM using only 0.49 W/cfm – well below the threshold of Passive House applications.

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Explore the themes, and trends impacting the built and natural environment

Learn about our solutions and technology

Explore the themes, and trends impacting the built and natural environment

We’re here to support you during all the phases of a project

Feel good inside

Explore the themes, and trends impacting the built and natural environment

Learn about our solutions and technology

Explore the themes, and trends impacting the built and natural environment

We’re here to support you during all the phases of a project

Feel good inside

PHFA – Pennsylvania Housing Finance Authority

PHFA - Pennsylvania Housing Finance Authority

Project: Passive House & LEED Platinum Historical Renovation and Tower Expansion.

USA

2019

Harrisburg, PA

Murray Associates

RFS

PHFA

Goal:

To accommodate growth, the Pennsylvania Housing Finance Authority (PHFA) renovated their headquarters and added a new 8-story tower. As a proponent for buildings constructed to the Passive House concept, it is fitting that PHFA chose to design the project to meet PHIUS Passive House requirements.

Requirement:

Solution:

Solution:

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