Recycled Parts Moderator Newsgroup, Discussion Board and Trading Place > Recycling Codes
> Plastic
> Greenheck energy recovery ventilators must sell now
Greenheck energy recovery ventilators must sell now
I am listing these two units for a friend of mine. He purchased a hockey rink in Chagrin Falls, Ohio and they came with it. They are crated and have never been used! He wants to get rid of them so feel free to make an offer on one or both! MY FRIEND SAYS THAT THESE ORIGINALLY SOLD FOR $7000 EACH but you can have both units for $5000 or $2500 apiece. You may pick them up or we will have them truck freighted at actual cost (they are heavy!) Please email me for exact dimensions, weight approx. 500 lbs (estimated) I have copied the manufacturers brochure, hope it helps. For additional photos, please request.
• 1.5 in. wg external static pressure
• Office Buildings • Restaurants
To provide a healthy and productive indoor environment, adequate ventilation is necessary. ASHRAE Standard 62, Ventilation for Acceptable Indoor Air Quality, prescribes
ventilation requirements. However, providing adequate ventilation AND controlling energy costs may appear to be mutually exclusive objectives. Greenheck recognized this
dilemma and accepted the challenge of developing ventilation equipment that enables an HVAC system to meet both objectives. The result is the Greenheck Energy Recovery
Ventilator, which allows the HVAC system to meet the Standard 62 ventilation rates while controlling energy costs and humidity levels. This product line offers the
system designer an economical solution to many Indoor Air Quality problems. In many markets payback is less than one year. Additionally, Greenheck’s energy recovery
ventilators are easy to apply in new construction or renovation installations. Greenheck has combined its expertise in ventilation products with the latest technology in air-to-
air heat exchangers. The heart of the energy recovery ventilator is a light-weight polymer enthalpy wheel. Silica gel desiccant is permanently bonded to the polymer, which
provides a long and reliable energy transfer life. This state of the art wheel design has low pressure drop characteristics that enable the ventilator to accommodate external
Static pressure requirements up to 1.50 in. wg. Also, in contrast to heat wheels of the 1970's, Greenheck’s wheels were designed specifically for commercial and
institutional installations with minimal maintenance in mind. For comfort ventilation applications up to 12,000 cfm, it is the best all around total energy recovery device
Energy recovery wheels certified by the ARI Air-to-Air Energy Recovery Ventilation Equipment Certification Program in accordance with ARI Standard 1060. Actual performance in packaged equipment may
vary. Certified Ratings are available in the Certified Product Directory at http://www.ari.org/directories/erv
The basic objectives for providing acceptable Indoor Air Quality are to control indoor
contaminant levels while maintaining desired indoor air temperature and humidity. Compliance with the prescribed ventilation rates in ASHRAE Standard 62 appear to satisfy
the contaminant issue. However, simply increasing outdoor air requirements with “traditional†HVAC systems may not address the humidity issue properly
and often leads to significant energy cost increases. The best solution for most commercial and institutional facilities will include an enthalpy wheel
product. These products transfer temperature and moisture properties from one airstream to another. The result is capturing the cooling or heating energy from
the exhaust air before it leaves the HVAC system.
• Extracts moisture from outdoor air.
• Reduces ventilation cooling load up to 4 tons per 1,000 cfm.
• Adds moisture to outdoor air.
• Reduces heating and humidification costs by up to 60,000 Btuh per 1,000 cfm at design temperature.
The Greenheck ERV product line provides complete airflow performance coverage from 400 cfm to 12,000 cfm. Four product arrangements offer installation flexibility for both
interior and exterior applications . All models include the latest technology for air to air energy transfer. Light-weight polymer energy transfer wheels
with a permanently bonded silica gel coating, require minimal maintenance and are a key contributor to economically priced energy recovery ventilators. Standard features are
• Licensed to bear the AMCA seal for Air Performance.
• Enthalpy wheel certified by ARI Standard 1060 for recovering both sensible and latent energy (Sensible only wheel optional).
• Energy recovery wheel with long, reliable life.
• Quiet running, forward curved blowers.
• Housing lined with foil faced insulation.
• Adjustable motor pulleys for final system balancing.
• All internal electrical components are factory wired. Motor starters and disconnect switch are standard.
• Neoprene isolation on motor/blower assembly to minimize noise transmittance to building is standard.
• Compact housing and multiple ducting arrangements for maximum design flexibility.
• All exterior arrangements are provided with intake and exhaust hoods as standard.
These product features contribute to the key benefits of low maintenance, effective control of humidity and economical IAQ solutions.
Proper maintenance is the key to extending the life of any component within an HVAC system. One way to help assure that maintenance is done properly is to minimize the
work involved for the people who perform it. With this in mind, we designed our energy recovery ventilators so that minimal maintenance is required. Here's how:
• Removable side or hinged panels provide easy access to energy wheel, blowers, motors and drive components.
• Wheel cassette slides out easily for inspection and maintenance.
• Wheel sections are easily removed, without tools for periodic cleaning.
• Filters are readily accessible.
• Moisture is transferred entirely in the vapor phase to eliminate the requirement for condensate drains.
• Light weight polymer enthalpy wheel contributes to low shaft and bearing loads, resulting in reliable, long life operation.
Low first cost and maximum energy savings combine to yield an extremely attractive payback on Greenheck Energy Recovery Ventilators. By
incorporating ERVs into the HVAC system, air conditioning and heating equipment can be downsized considerably. In hot and humid climates
the energy recovery ventilator cost is offset by the avoided increase in air conditioning equipment cost and payback is immediate. In many other climates,
payback is typically less than one year.
Humidity is an important factor to consider for providing comfortable room conditions and a healthy environment. Additionally, controlling humidity levels
can prevent building asthmatic and structural problems. More than 75% of all IAQ problems start with comfort complaints. If these are not addressed,
employees will continue to complain and become less productive. From the health perspective, humidity levels that are too high may promote growth
of mold, bacteria, viruses and fungi. Low humidity may cause irritation and increase respiratory symptoms. Energy recovery ventilators are perfectly suited to
help control humidity. In the summer, when outdoor humidity is high, the energy wheel dehumidifies the outdoor air. This greatly reduces the latent load on
the air conditioning equipment and also eliminates rising indoor humidity levels that can occur in hot, humid climates. In the winter, when outdoor air is dry,
the energy wheel humidifies the outdoor air. This increases comfort and reduces the amount of humidification required.
This compact design is ideal for the space limitations that routinely complicate interior installations.
Where roof mount or pad mount installations are preferred, Greenheck offers three arrangements to provide the flexibility to simplify system design and
installation. The housing and hood design minimize re-entrainment of exhaust air.
Ideal for roof mount installations where both exhaust and supply ducts penetrate the roof deck and attach to the bottom of the energy recovery ventilator.
Ideal for roof mount installations where the supply airstream is to be routed directly into a rooftop HVAC unit. Exhaust air enters the ERV from below.
Suited for pad mounting, where both the exhaust and supply ducts connect to the end of the ERV.
ARRANGEMENT A - INTERIOR MOUNTED ARRANGEMENT B - ROOF MOUNTED
Fresh, outdoor air enters the energy recovery ventilator and is pre-treated before entering the heating / cooling equipment. The energy source
for pre-treating the outdoor air is the portion of the return air to be exhausted through the energy recovery ventilator. Energy Recovery Ventilators may be applied in many
HVAC installations. Integrating the energy recovery ventilator into the air conditioning duct system is a common installation. This approach enables the
specifying engineer to use the same basic design as traditional HVAC systems, but with the savings provided by energy recovery. The main modifications, as
compared to traditional systems, simply involve routing fresh outdoor and stale exhaust air through the energy recovery ventilator. In most cases, additional ductwork
is minimal. This means of providing adequate outdoor air to the occupied spaces is the same in concept no matter how the air conditioning equipment is configured. Since the
energy recovery ventilator and air conditioning equipment are integrated, or coupled together, the appropriate amount of fresh outdoor air is provided
whenever the air conditioning equipment is operating. There are many system configurations that utilize this concept.
only one space. For additional design flexibility, the energy recovery ventilator may also be duct mounted.
With Packaged Rooftop Equipment
The integrated system concept provides the simplest, lowest cost application for ERVs when the outdoor air to total supply air percentage (i.e., 25%) is the same for
all spaces. However, when a single HVAC unit services multiple spaces where outdoor air requirements (as a percent of total supply air) differ significantly, the
integrated system is not the best approach. An example may help illustrate this concept. Assume that a packaged rooftop unit serves an office building
and provides supply air that is made up of 25% outdoor air and 75% return. Employee A, in an office with a high thermal load, receives 200 cfm of supply air which
includes 50 cfm of outdoor air. Employee B, in an office with a low thermal load, receives only 40 cfm of supply air which includes just 10 cfm of outdoor air. In this
example, employee A receives far more than the 20 cfm per person prescribed by ASHRAE Standard 62, which translates into higher energy and equipment costs to
condition the extra 30 cfm. Conversely, employee B received far less than the Standard prescribes, which translates into lower productivity and potential lawsuits.
In cases as described above, integrated systems are unable to effectively address both the indoor air quality and energy conservation issues.
De-coupled systems should be strongly considered where thermal loads vary significantly from space to space. The de-coupled concept uses a dedicated
system for ventilation air delivery, which allows independent control of ventilation air and thermal conditioning. The air conditioning equipment
processes 100% return air and supplies it back to the occupied space. Exhausting stale air and supplying fresh outdoor air is handled by the energy recovery
ventilator. For multiple space applications where outdoor air requirements (%) vary significantly from space to space, the de-coupled system has the following
• Adequate outdoor air is supplied to all occupied spaces.
• Compliance with ASHRAE Standard 62 for all spaces can be easily demonstrated.
• Requires the lowest total outdoor air quantities, which results in the lowest energy consumption.
• Provides the lowest initial cost in most cases.
Applying the de-coupled system with energy recovery makes a good concept great. The energy recovery ventilator conditions the outdoor air to temperature
and humidity values at, or near, room conditions. Depending on the climate and preference of the specifying engineer, supplemental heating or cooling
for the ventilation air may not be necessary. If supplemental heating or cooling is desired Greenheck’s Models ERH, ERCH, or ERT should be considered.
For specific performance for all arrangements, use Greenheck’s Computer Aided Product Selection (CAPS) program. All models are available in A, B, C, & D arrangements.
A wide variety of dampers are available in either gravity or motorized operation. Dampers are internally mounted at the supply and exhaust inlet.
Motorized dampers are factory wired to single point power connection.
Standard size 2 inch pleated, medium efficiency filters and filter racks are available for supply and/or exhaust air streams.
Greenheck’s Permatector coating is available for a durable, long lasting finish. Decorative paints are available in a variety of colors to match existing
Prefabricated roof curbs are available to ensure compatibility between ventilator, curb and roof opening. Standard construction is galvanized steel
and includes fiberglass insulation. Curbs are supplied with duct adapters. Consult factory for curb outside dimensions and roof openings required.
The supply and exhaust side are internally lined with 20 gauge galvanized steel.
A louvered intake hood with 2 inch aluminum mesh filters and exhaust hood with an integral backdraft damper are available.
Pressure taps sense excessive pressure drop across the filter and sends a signal to a dirty filter indicator light. Light and control box are available from the factory.
Sensor monitors wheel rotation. Signal may be sent to remote indicator light. Light and control box are available from the factory.
Economizer Control (Free Cooling)
When cool outdoor air is available, the energy wheel may be controlled to provide free cooling. Economizer operation can be initiated by the unit
sensors alone or in conjunction with a call for cooling (field wired). Two factory installed options are available.
• Wheel Off: De-energizes the wheel when the outdoor temperature is below the field adjustable set point (enthalpy sensor also available). An
automatic economizer override is included to engage the wheel for winter heating operation.
Wheel Modulation: Modulates the energy recovery wheel to maintain a 55°F discharge temperature during economizer operation.
Control centers in Greenheck energy recovery ventilators enable control of the energy wheel and fans via 24-volt control signals (by others). Controls
Speed control for system balancing is available for model ERV-251. Belt driven models are available with two speed motors or variable frequency drives.
Panel side doors are a standard feature on all units. Hinged access doors are available on models ERV- 361, ERV-521, ERV-581, ERV-522 and ERV-582.
Access doors are removable hinge type with lift and turn latches for access to internal components.
• GFCI Service Outlet (wiring by others)
• Service Lights (wiring by others)
Because Greenheck Energy Recovery Ventilators have a low frost threshold, frost control options are not necessary in many climates. Where outdoor
temperatures may drop below the frost threshold during the ERV operational hours, three frost control options are available. The map at left indicates the
frost control options, if any, that are appropriate based on climactic conditions during typical 16 hour per day operation.® Accessories
The frost threshold is the outdoor temperature at which
FROST THRESHOLD TEMPERATURE frost will begin to form on the ERV wheel. For
Greenheck Energy Recovery Ventilators, the frost threshold is typically below 5°F. Frost threshold is dependent on indoor temperature and humidity. The
table at right shows how the frost threshold temperatures vary depending on indoor conditions.
Greenheck P.O. Box 410 • Schofield, WI 54476-0410 • Phone (***) 359-6171 • greenheck.com
