CSI Specifications

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Product Information

For RenewAire product data, including equipment description, catalog, and instruction manuals, visit www.renewaire.com/our-ervs/. This product is available in several different configurations. The equipment is generally installed as part of a building's HVAC system.

For any questions regarding this product, please contact your local authorized RenewAire representative. To find your local representative, visit www.renewaire.com/how-to-buy/find-a-dealer/ and select your region.

SECTION 23 72 00 - AIR-TO-AIR ENERGY RECOVERY VENTILATOR

PART 1 - GENERAL

1.1 SUMMARY

This section includes air-to-air energy recovery ventilators intended for indoor installation. In this document, these units may be referred to by the abbreviation "Energy Recovery Ventilator" (ERV) for brevity.

1.2

General provisions and contract drawings, including general requirements of Division 01, Division 23 specification sections, and common HVAC work requirements, apply to the work specified in this section.

Section 23 09 00: Controls and Instrumentation

1.3 DOCUMENTS TO BE FURNISHED

• Product Data: For each type or model of energy recovery ventilator, include the following:
• Unit performance data for supply and exhaust air, indicating system operating conditions.
• Enthalpy core performance data for summer and winter operation.
• Scaled drawings for each installation type, with isometric and plan views, indicating the location of connected ductwork and clearance requirements for servicing.
• Estimated gross weight of each installed unit.
• Filter types, quantities, and sizes
• Installation, Operation, and Maintenance (IOM) manual for each model.

Documents to be furnished for LEED certification:

• Provide data for prerequisite E01: Documentation indicating that the units comply with ASHRAE Standard 62.1-2010, Section 5 - 'Systems and Equipment'.

Execution Drawings:

• For air-to-air energy recovery ventilators, include plans, elevations, sections, details, and attachments related to other work.
• Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, on-site assembly method, components, and the location and size of each on-site connection.

1.4 QUALITY ASSURANCE

• Source Limitations: Procure air-to-air energy recovery ventilator with all components or accessories from a single manufacturer.
• For fabrication, installation, and testing of the work covered by this section, employ only properly trained and experienced workers who are thoroughly familiar with the required elements and the manufacturer's recommended installation methods.
• The ERV core shall be guaranteed free from manufacturing defects and shall retain its functional characteristics, under normal operating conditions, for a period of ten (10) years from the date of purchase. The remainder of the unit shall be guaranteed free from manufacturing defects and shall retain its functional characteristics, under normal operating conditions, for a period of two (2) years from the date of installation.
• The manufacturer shall be able to provide proof of independent core testing by Underwriters Laboratory (UL), verifying a maximum Flame Spread Index (FSI) of 25 and a maximum Smoke Developed Index (SDI) of 50, thus satisfying NFPA90A and NFPA 90B requirements for materials in a compartment handling air intended to be circulated in a duct system. The test method shall comply with UL 723.
• Certifications:
• Energy recovery cores used in these products shall be certified by a third-party agency in accordance with AHRI Standard 1060 for energy recovery ventilators. AHRI published certifications shall confirm the manufacturer's published performance for airflow, static pressure, temperature and total efficiency, purge air (OACF), and exhaust air leakage (EATR). Products not currently AHRI certified will not be accepted. OACF shall not exceed 1.02 and EATR shall be 0% of balanced airflow.

1.5 COORDINATION

• Coordinate the size and location of all building penetrations required for the installation of each energy recovery ventilator and associated electrical systems.
• Coordinate the execution of associated plumbing, HVAC, and electrical work.

PART 2 – PRODUCTS

2.1 MANUFACTURERS

• Available Manufacturers: Subject to compliance with the specifications contained herein, manufacturers offering products that may be incorporated into the work include, but are not limited to:
• RenewAire
• The manufacturer shall have been in the business of manufacturing energy recovery ventilators for at least 10 years.

2.2 FACTORY-FABRICATED UNITS

Air-to-air energy recovery ventilators shall be fully factory assembled and consist of a fixed plate cross-flow heat exchanger with no moving parts, a single-wall insulated cabinet of 20-gauge galvanized steel G90, filter assemblies for supply and exhaust air, an enthalpy core, with all specified internal components and accessories installed and tested at the factory. The entire unit, except for site-installed components, shall be factory assembled and tested.

2.3 CABINET

• Materials: Insulated single-wall metal cabinet, fabricated to allow access to internal components for servicing.
• Exterior Casing: 20-gauge galvanized steel (G90), complying with ASTM A653 for components not receiving a painted finish.
• Access doors shall be equipped with hinges and airtight closed-cell foam gaskets. Door pressure taps, with captive plugs, shall be provided for measuring traverse pressure to allow for accurate airflow measurement.
• The unit shall be factory equipped with duct flanges on all duct openings.
• Cabinet Insulation: Unit walls and doors shall be insulated with 1-inch thick, 4-pound density material, faced with aluminum foil and wire mesh, high fiberglass panel insulation, providing a cleanable surface and eliminating any risk of fresh air exposure to fiberglass, with a minimum R-value of 4.3 (hr-ft2-°F/BTU).
• Enthalpy Core: The energy recovery core shall be total enthalpy type, capable of transferring both sensible and latent heat. energy between air streams. Latent energy transfer shall be accomplished by direct water vapor transfer from one airstream to the other, without exposing the transfer medium in subsequent cycles directly to exhaust air, then to fresh air. No condensate drain shall be permitted. The energy recovery core shall be designed and constructed to allow for cleaning and removal for servicing. The energy recovery core shall be warranted for ten years. Performance criteria shall comply with AHRI Standard 1060.
• Frost Passive Control: The ERV core shall operate without condensation or frosting under normal operating conditions (defined as outdoor temperatures above -10 °F and indoor relative humidity below 40%). Occasional more extreme conditions shall not affect the core's usual operation, performance, or durability. No condensate drain shall be permitted.

2.7 FILTER SECTION

The ERV shall be equipped with 2-inch thick disposable pleated filters [MERV 8][MERV 13] located in the outdoor and exhaust air streams. All filters shall be accessible from the exterior of the unit.

PART 3 – EXECUTION

3.1 EXAMINATION

• Prior to commencing installation, examine the area and conditions to verify that the location is correct and in accordance with installation tolerances and other conditions that may affect equipment performance. Refer to the equipment's operation and installation manual.
• Verify the rough-in installation of plumbing, electrical, and HVAC system to verify actual location and compliance with equipment requirements. Consult the equipment's operation and maintenance manual.
• Proceed with installation only after all unsatisfactory conditions have been corrected.

3.2 INSTALLATION

Installation shall be performed in accordance with these written specifications, project drawings, manufacturer's installation instructions as documented in the manufacturer's operation and maintenance manual, best practices, and all applicable building codes.

Install the equipment with necessary clearances for servicing and maintenance.

3.3 CONNECTIONS

In all cases, industry best practices shall be followed. Connections shall be made in accordance with the installation requirements indicated above.

Duct installation and connection requirements are specified in Division 23 of this document.

3.4 SITE QUALITY CONTROL

The contractor shall inspect site-assembled components and equipment installation. Results shall be reported in writing to the architect/engineer. Inspection shall include a complete commissioning checklist comprising (at a minimum) the following items: Completed commissioning checklists as found in the manufacturer's operation manual. Insert any other requirements here.

3.5 START-UP SERVICE

Contractor responsible for performing start-up service. Clean the entire unit, comb coil fins as necessary, and install clean filters. Refer to Section 23 'Testing, Adjusting, and Balancing' and comply with the provisions therein.

3.6 DEMONSTRATION AND TRAINING

The contractor shall train the owner's maintenance personnel in the adjustment, operation, and maintenance of the entire makeup air unit. Refer to Division 01 Section Closeout Procedures, Demonstration, and Training.