4
For the Building Owner
• Improved Indoor Air Quality (IAQ)
Introducing fresh, outdoor air to a building is a key component to sustaining excellent indoor air quality.
Outdoor air can be very expensive to heat and cool, but the ERV unit can provide an economical approach to
delivering outdoor air into a building.
• Energy Savings = Quick Payback
The energy recovery unit provides energy savings throughout the year. In the summer, the energy recovery
unit removes heat and moisture out of the outdoor air, but in the winter, heat and moisture are added back into
the fresh airstream. When you combine the energy savings from summer and winter operation, they lead to a
very fast payback period. In most parts of the United States, the payback is less than 2 years!
For the Maintenance Personnel
• Low Maintenance Equipment
Energy Wheel: The most important component in the ERV is the energy wheel.
This device should be inspected and cleaned as necessary, which will vary by
application and environment. Any cleaning that is required is simplified by the
easy accessible wheel with removable segments. Cleaning requires no special
equipment (light detergent and water) and can be performed in a location that is
convenient to you.
Fans: The blowers that are used in the ERV are centrifugal, forward-curved- type
fans. These fans come with easily adjustable pulleys, belt tension bolts and
permanently sealed bearings.
Filters: The 2-inch, 30% efficient MERV 8 filters that are included with the unit are
designed for easy access and removal.
• Quality Construction
Greenheck has focused on the manufacturing and unit designs to create well-
constructed equipment. Investments in automated manufacturing processes
provide accurate and repeatable results, giving excellent part fit and unit strength.
Incorporation of innovative designs add to the quality, while keeping maintenance
work simple to perform.
• Long-Lasting Equipment
Because of our high-quality construction, the equipment that goes to the field is made to last. As reassurance
to the customer, each ERV unit carries a 1-year warranty from the ship date and the wheel components
(segments, cassette, belt, and pulleys) carry a 5-year warranty.
What is the Benefit with
Greenheck Energy Recovery?
Equipment Reduction Using Energy Recovery on 3000 cfm Outdoor Air
Gas Price* Electric Cost**
Cooling
Equipment
Reduction
(tons)
Annual
Summer
Cooling
Savings
Heating
Equipment
Reduction
(MBH)
Annual Winter
Heating
Savings
Approximate
Payback
(Years)***
Boston, MA 1.68 0.1495 8.72 226 161 4544 0.78
Minneapolis, MN 1.14 0.0712 9.55 161 217 3261 0.88
St. Louis, MO 1.34 0.0558 12.1 356 173 3088 0.35
Raleigh, NC 1.48 0.073 11.3 424 138 2790 0.57
Houston, TX 1.10 0.1011 13.0 1701 111 1089 0.22
Tampa, FL 1.59 0.0974 13.1 1779 89 988 0.21
Portland, OR 1.21 0.071 4.17 2 123 2930 2.34
Phoenix AZ 1.13 0.0766 9.40 271 161 1478 1.95
* Average gas price (dollars per therm) per region in the first six months of 2007 (source: Energy Information Administration)
** Average electricity cost (dollars per kWh) in March of 2007 (source: Energy Information Administration)
*** Assumptions: $3/cfm energy recovery cost; $650/ton avoided cooling equipment cost; 75.6% effective energy wheel; 12 hrs/day 5 days/week operation
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