Miami Valley South Hospital Aeroseal Project

Hospital Improves Ventilation, Reduces Energy Costs with Aeroseal

Sealing ducts with Aeroseal allowed administrators to reduce exhaust fan speed while increasing air exchange rate – savings resulted in 3-year payback.

Among its buildings, Miami Valley Hospital South in Centerville, Ohio includes a 60,000 sq ft
medical office building, a state-of-the-art cancer center and a main hospital unit. During routine
HVAC maintenance, the facility’s test and balancing experts found that leaks, common throughout
many of the duct systems employed on campus, were leading to significant HVAC performance
inefficiencies. With an ongoing mandate to reduce energy use, hospital administrators knew that by
fixing the leaks, they could potentially save a substantial amount of energy.

The duct system serving the hospital’s six-story medical office building (MOB) presented the ideal opportunity for hospital administrators to try a new approach to duct sealing that eliminated the lengthy processes involved in manually locating and sealing each individual leak.

In Brief

  • Building: Miami Valley Hospital South MOB
  • Location: Centerville, Ohio
  • Service Technician: Siemens Industry Inc.
  • Aeroseal Contractors: Service-Tech
  • TAB: Kahoe Air Balance Company
  • Goal: Reduce energy use / save on utility costs
  • Before Aeroseal: 1,673 CFM of leakage
  • After Aeroseal: 576 CFM of leakage
  • Results: kWh savings of 57,000 = $5,278/annually

Aeroseal technicians took one day to aeroseal the MOB duct system. The facility’s TAB expert
and its facility operations manager were on hand to watch the process and to view a graph
depicting the leakage rate as the sealant did its job.

The final aeroseal printout report for this single duct system showed the leakage drop from the initial 1,673 CFM down to 576 CFM. As a result, engineers were able to reduce the fan speed, saving 57,000 kWh. The hospital estimates annual savings of more than $5,000 with an ROI attainment in a little more than two years.
After receiving similar results on a second trial project, hospital administrators are looking at several other HVAC systems within the facilities that could benefit from Aeroseal duct sealing.


“This approach offers a way to get to sections of the ductwork that you wouldn’t otherwise be able to reach. It can also find and seal a lot of smaller leaks – leaks you wouldn’t otherwise find. A lot of small leaks multiply out to equal a BIG leak – and potentially big energy savings.”

Larry Berna
Facility Operations Manager
Miami Valley Hospital South

“Once the walls are up, it’s very difficult to get to a majority of leaks. So if you have a lot of ductwork that is hard to access, using this technology could make a lot of sense.”

Jason Heppe
Test & Balancing Engineer
Kehoe Air Balancing Company

“I focus exclusively on healthcare facilities, and I think that any one of my clients would have an application for this technology. If this (sealing project) was done manually, it would have potentially taken weeks rather than a couple of days to complete.”

David Smith
Account Executive
Siemens Industry Inc.

About Aeroseal Technology

Before/After Aeroseal
  • Developed at Lawrence Berkeley National Laboratory in 1994.
  • Research for aeroseal technology was partially funded by the U.S. Department of Energy.
  • Aeroseal is the only duct sealant technology that is applied from the inside of the duct system. It is delivered as a non-toxic aerosol mist that seeks out and plugs leaks.
  • Aeroseal has proven to be 95% effective at sealing air duct leaks.

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