RenewAire EV Series ERV

Safety Warnings and Cautions

WARNING: Risk of Fire, Electric Shock, or Injury. Observe all applicable codes and follow these guidelines:

• Always unplug the unit before servicing or cleaning. Ensure the unit is not running before opening the access door.
• This manual provides suggested installation methods; local codes and standards may require additional measures.
• Installation and electrical wiring must be performed by qualified professionals in accordance with all applicable codes, standards, and licensing requirements.
• Structural alterations for installation must comply with all building, health, and safety code requirements.
• Connect the unit only to a 120 VAC grounded receptacle protected by a 15 or 20 amp circuit breaker. Do not remove the unit's line cord.
• Do not install the unit or controls where they can be reached from a tub or shower.
• The unit must be properly ducted to the outdoors.
• The outside air inlet must be located away from sources of hazardous air, such as auto exhausts.
• Ensure sufficient air for proper combustion and exhausting of gases from fuel-burning equipment that may be in the affected area. If the unit exhausts air from a space with chimney-vented fuel-burning equipment, take steps to ensure the combustion air supply is not affected, following the heating equipment manufacturer's requirements and applicable codes.
• This unit is intended for general ventilation only. Do not use it to exhaust hazardous or explosive materials and vapors. Do not connect it to range hoods, fume hoods, or collection systems for toxics.
• When cutting or drilling into walls or ceilings, avoid damaging electrical wiring and other hidden utilities.
• Use the unit only as intended by the manufacturer. Contact the manufacturer if you have questions.

WARNING: There is no known safe level of cigarette smoke. While any ventilation system may improve spaces where cigarettes are smoked, it cannot protect against severe long-term health hazards of exposure to cigarette smoke.

CAUTION:

• To avoid motor bearing damage and noise, keep drywall spray, construction dust, etc., out of the unit.
• Do not connect power to the unit's external control terminals, as this will damage the unit. External terminals are for unpowered controls designed for low-voltage operation only.

CAUTION: Provide Adequate Service Access for Maintenance The unit requires regular filter and core inspections. Install the unit where you can access the core for cleaning and replacing filters, and where you can access wiring for installation and service.

CAUTION: Do not remove or disable the wiring interconnection between the Overload Relays and the Contactors, as the motor(s) will not be protected against overload without it.

CAUTION: DO NOT WASH THE ENERGY EXCHANGE CORE. Keep it away from water or fire to avoid damage. Always handle the core carefully.

Owner Information

NOTICE: Information recorded here is specific to one ERV. Make copies for additional ERVs and identify each copy by its unit tag.

UNIT INFORMATION

Record model and serial numbers from the RenewAire unit label (located outside the appliance). This information is needed for factory assistance.

ERV Model: _________________________

Serial Number: _________________________

NOTE: This page is to be completed by the installing contractor. The completed document is to be turned over to the owner after start-up.

Diagram of a typical unit label showing model, serial number, electrical ratings, and performance data.

Table of Contents

Table of Illustrations

1.0 Overview

1.1 Definitions

Energy Exchange System: Cross flow fixed-plate enthalpic energy exchange core: engineered, proprietary resin-media composite. Provides both sensible and latent heat transfer.

Access Door: Front panel opens to provide access to filters, blowers, and energy exchanger. Snap latches and hinges provided for easy service.

Insulation: 1" foil-faced EPS foam throughout.

Blower/Motor: A single high efficiency PSC motor directly drives two large diameter centrifugal blowers for quiet operation.

Warranty: Ten year limited warranty on energy exchange core; five year limited warranty against defects in material and workmanship on all other components.

1.2 Description

1.2.1 Purpose of an ERV System

Many modern homes are built airtight for energy efficiency and comfort. This results in natural air infiltration rates that are often too low for acceptable indoor air quality. An ERV removes gaseous pollutants such as odors, winter-time excess humidity, formaldehyde, smoke, radon, vapors from cleaning products, and other chemicals. It does not remove dust or small particles.

1.2.2 When Should You Use Your ERV?

Use your ERV when windows are closed and ventilation is needed. When outdoor air is warmer or cooler than comfortable, the ERV allows for quieter, more secure home operation with closed windows and saves energy.

1.2.3 Using an ERV with Air-Conditioning

An ERV works effectively with air-conditioning. Its "enthalpy-transfer" energy-exchange core reduces the moisture content of incoming outside air, making it the preferred ventilation method during air-conditioning to minimize moisture introduction.

1.2.4 Controlling Excess Humidity During Cold Weather

When first turned on at the start of the heating season or upon installation, the ERV may need to run full-time for several days to reduce indoor humidity levels. A properly set dehumidistat will manage this. If using a proportional timer control (PTL or FM), set it to "100%" for several days to address excess humidity during cold weather.

2.0 Unit Placement

2.1 Before You Begin

Read all instructions before installation. Review supplemental instructions for any controls. Carefully unpack and inspect the unit for shipping damage. Open the access door and inspect the interior. Attach the four duct collars to the unit using the provided screws.

2.2 Location of the Unit

Select a location ensuring:

• The fresh air intake vent from the outside is at least 10' from any other contaminated exhaust vent and is at least 30" long.
• Ducts to the outside are as short and straight as possible for optimal system performance and balance (equal intake and exhaust air).
• The power cord reaches an electrical outlet.
• The access door can be opened for cleaning filters and the core. Provide at least 24" of clearance at the front for service access to blowers, filters, and the energy exchange core.
• The exhaust outlet and fresh air inlet on the outside of the building are at least ten feet apart to prevent cross-contamination. The exhaust duct should be approximately the same length as the fresh air duct.
• The exhaust outlet does not discharge into an enclosed space or any other structure.
• The exhaust outlet and fresh air inlet are not installed through the roof.

Mounting on a concrete foundation wall is preferred as it isolates blower vibration. If the unit is in a conditioned space, only the OA and EA ducts require insulation. For unconditioned spaces (attic, crawl space), all four ducts must be insulated, and the application should be evaluated by an HVAC design professional or RenewAire.

RenewAire's concentric vent kit can combine exhaust and outdoor air terminations. If a combined termination is used with non-kitchen exhaust, minimum separation is not required if exhaust air concentration in intake airflow does not exceed 10% (ASHRAE 62.2-2019, Section 6.68).

Diagram illustrating required service clearances around the unit, showing door swing and minimum service area dimensions.

NOTE: Ducts inside a building connected to the outside must be insulated with a sealed vapor barrier on both the inside and outside. Insulation should have an R-value of at least R-6; R-8 is recommended.

CAUTION: Provide Adequate Service Access for Maintenance The unit requires regular filter and core inspections. Install the unit where you can access the core for cleaning and replacing filters, and where you can access wiring for installation and service.

2.3 Duct Sizes and Insulation

The Exhaust Air Duct and the Outside Air Duct connect the unit to the outside, typically using flexible insulated duct.

2.3.1 Duct Sizes

• Exhaust Air & Outside Air (EA & OA):
• EV130: 6" round insulated duct; 8" round insulated duct may be used for maximum airflow.
• EV200, EV240, and EV300: 8" round insulated duct recommended.
• Supply Air & Return Air (SA & RA):
• 6" round or 8" oval rigid un-insulated.

2.4 Ductwork Applications

• For Houses Without Ducted Heating or Cooling Systems: Typically, one or two fresh air grilles in a central area provide effective supply air distribution. Fresh air grilles should be in traffic areas (hallways, stairways) rather than sitting areas, as supply air is not fully conditioned. For high-occupancy rooms, supply air can be split.
• For Houses With Ducted Heating or Cooling Systems: Units are often installed with the supply air duct connected directly to the return duct of the main HVAC system. Connect the supply air duct at least three feet from the return plenum to avoid furnace blower suction issues.
• For Installations Collecting Stale Air from Specific Rooms: Locate stale air return grilles (RA) in rooms where moisture and odors are generated (bathrooms, kitchen) or where contaminants are present (home workshop). Grilles in other areas can be dampered. A central hallway location is also acceptable but less effective for rapid humidity/odor removal from kitchens and bathrooms. Locate RA grilles near the ceiling on inside walls or in ceilings.
• Stale Air Return Grille Sizes:
• Bathroom: 4" x 10" or 6" x 10" (40-60 sq. in.)
• Kitchen: 6" x 10" (60 sq. in.)
• (8" round for EV300)
• Can an ERV be Used to Ventilate Bathrooms? Yes, a RenewAire ERV can serve as a central exhaust system replacing bathroom exhaust fans. Tie a grille in each bathroom back to the ERV. A successful installation should provide at least 50 CFM of exhaust per moisture-producing bathroom. The EV130 is suitable for up to two bathrooms, EV200/EV240 for up to four, and EV300 for up to six. Install a control in each ventilated bathroom.
• For Houses Where Radon is a Concern: While radon entry prevention (under-slab suction, etc.) is the primary defense, if moderate radon levels persist, the unit should slightly pressurize the basement. Radon mitigation installation is beyond this manual's scope; consult a radon mitigation professional.

Diagrams illustrating various ductwork configurations: separate room air pick-up, separate return/supply air, furnace return air back into return air, and furnace return air back into supply air. These diagrams show the paths of outside air (OA), exhaust air (EA), return air (RA), and supply air (SA), often indicating minimum distances and connections to the furnace.

NOTE: ERV blower may be operated separate from furnace blower.

NOTE: The furnace blower must be operated any time the ERV is operated. Use furnace fan "on" continuous low speed or optional FM control to cycle the furnace fan on the ERV.

3.0 Installation

3.1 Mounting the Unit

The unit may be installed in any orientation, prioritizing the simplest duct layout and connections.

• Mounting on a Concrete Foundation Wall: Mount the hanging bracket to the wall using appropriate concrete anchors. Apply pre-cut foam tape to the unit's mounting flange where it contacts the hanging bracket, and to two holes on the opposite flange. The tape should form a "U" shape to cushion the flanges. Lift the unit and slide its flange into the hanging bracket. Fasten the opposite flange to the structure using metal flat washers and screws (provided by others). Safety screws should also be installed through the bracket and flange. Ensure screws are properly selected for the loads and substrate.
• Mounting to a Stud Wall: Use the supplied hanging bracket kit as described for mounting to a concrete foundation wall.
• Suspending from Floor Joists or Trusses: Screw the unit directly to joists or trusses using the hanging bracket and integral flange, following the same procedure as for mounting to a concrete foundation wall.

Diagram illustrating mounting the ERV to a stud wall, showing bracket, screws, and foam tape.

CAUTION: The vapor barrier should be continuous and sealed against air and moisture leakage to prevent condensation or ice formation on duct surfaces or insulation in cold weather.

CAUTION: Risk of injury when lifting unit and installing overhead. Get a helper and wear eye protection.

3.2 Installing Outside Air and Exhaust Air Ducts

Ducts connecting the unit to the outside must be well-insulated. Band or tape the inner duct liner to the inner flange of the collar, securing with a sheet metal screw. Straighten insulation and slide the outer duct jacket onto the outer flange of the duct collar, securing with band or tape. Inlets and outlets should be screened against insects and vermin and shielded from weather to prevent rain or snow entry.

3.3 Installing Return Air Ducts

Stale air returns are connected by ducts to the unit. Empty stud cavities are often used, connecting to six-inch pipes at the bottom or top of the wall cavity. Seal all joints with duct sealant or tape. Local codes may require metal ducting from boots to grilles. Use rigid ducts for easier airflow. If duct runs are long (over 25' for 130 CFM or over 10' for 200 CFM) or have excessive bends, use eight-inch insulated flexible duct. Securely fasten and seal the duct collar.

DO NOT USE MORE FLEX DUCT THAN NECESSARY! Longer flex duct runs reduce ventilation performance. Stretch flex duct and avoid sharp bends.

3.4 Installing Supply Air Ducts

Use a five-foot section of flexible insulated duct to connect the unit to the supply air ports. This helps reduce noise transmission. Stretch the flex duct tightly for good airflow.

CAUTION: Install Fresh Air Inlet Away From Sources of Contaminants.

• Do not locate the fresh air inlet where vehicles may be serviced or left idling.
• The fresh air inlet should be at least 10' away from any exhaust sources (dryer vents, chimneys, furnace/water heater exhausts, carbon monoxide sources).
• Install 12" above ground level.
• Never locate the fresh air inlet inside a structure.

3.5 Controls

For continuous operation, no controls are needed. For controlled operation, use an optional RenewAire Percentage Timer Control (PTL or FM). Percentage timers can be located conveniently, often near the thermostat, to provide regular background ventilation. For rooms like bathrooms, use optional RenewAire Push-button Lighted (PBL) Controls in those rooms for secondary control.

Schematic diagram showing a typical control system with a PTL percentage timer and multiple PBL push-button controls.

WARNING: DANGER OF ELECTRICAL SHOCK WHEN SERVICING AN INSTALLED UNIT. Always unplug the unit before connecting or servicing controls.

CAUTION: Do not place any stale air returns in garages.

CAUTION: Do not connect Dryers to the unit. Do not connect Range Hoods to the unit.

4.0 Operation

4.1 Starting Up the Unit

• Inspect the installation to ensure all ductwork is correctly installed and sealed, filters are in place, and controls are connected.
• Shut and latch the unit's door.
• Plug the unit into a 115 VAC outlet; it may start immediately.
• Use the control to turn on the unit and check control operation.
• Verify that the unit's safety interlock switch turns off the unit when the door is opened.

4.2 Verifying Unit Performance

4.2.1 Airflow

Airflow should be present in both airstreams. External wall caps are often the easiest place to confirm airflow. For precise airflow measurement, permanently install flow measuring stations and manometers, which can also help determine when filters need cleaning or changing.

4.2.2 Use Static Taps to Measure Airflow Rates

Refer to Differential Static Across Core tables in Section 4.4.

4.2.3 Use Damper to Balance Airflow to Desired Rates, if necessary

The ERV's blower motors are suitable for volume control via inlet dampers. A balancing damper is provided in the unit parts tray. After measuring airflow, use the damper to balance it. Place the damper between the duct collar and the unit for the airstream with higher flow. Slowly move the damper into the duct until the desired airflow is recorded, then secure it with 1/8" tek screws.

Diagram showing the installation of a balancing damper within the ductwork, illustrating its placement and securing method.

NOTE: The unit is considered balanced if the difference between the two airflows is not more than 10 CFM.

NOTE: Install the damper so that it slides from the unit door down to the duct collar.

NOTE: Drilling through the case while the unit is running may draw metal shards into the unit.

4.3 Measuring Airflow

4.3.1 Equipment Required

• A magnehelic gauge or similar device capable of measuring 0-1.0 in. water of differential pressure.
• Two pieces of natural rubber latex tubing (1/8" ID, 1/16" Wall recommended).

4.4 Measuring Cross Core Static Pressure

Individual differential static pressures (DP) are measured using installed pressure ports on the front of the unit's core access doors. Do not relocate pressure ports.

• To read SCFM of Supply Air (SA): connect the "high" pressure side (+) of your device to the Outside Air (OA) port and the "low" pressure side (-) to the Supply Air (SA) port.
• To read SCFM of Room Air (RA): connect the "high" pressure side (+) of your device to the Room Air (RA) port and the "low" pressure side (-) to the Exhaust Air (EA) port.
• If the gauge reading drops below zero, reverse tubing connections.
• Use the reading displayed on your measurement device to cross-reference CFM output using the conversion chart.

Airflow diagram for EV130, EV200, EV240, EV300 units, indicating supply air (SA), exhaust air (EA), room air (RA), and outside air (OA) paths.

Tables showing Differential Static Across Core (DSP) vs. CFM for different models.

CAUTION: Ensure clean filters are installed before balancing airflow. Dirty or clogged filters reduce airflow.

5.0 Maintenance

Keep your ERV performing optimally by following these cleaning procedures.

5.1 To Clean the Energy Exchange Element

1. Remove the filters.
2. Vacuum the exposed faces of the energy exchange core with a soft brush attachment.
3. Re-install the filters.
4. Vacuum dust from the rest of the unit case. Dust typically collects only on the entering faces of the core; the interior remains clean due to laminar airflow.

5.2 Inspect and Change the Filters Regularly

Service filters every three months during regular use, or as needed. Filters should be replaced after several cleanings.

1. Release latches and swing the access door open. Remove the door by sliding it to one side.
2. Remove filter clips.
3. Pull out the filters.
4. Vacuum the filters with a hose attachment.
5. Re-install filters and clips (orange side of filter facing the core). Refer to Section 5.5 for Service Parts.
6. Re-install the door and fasten latches.

Replacement filters are available from your installing contractor. Alternatively, filters can be made from 3/4"-1" firm, spun polyester filter media.

• Filter Sizes:
• EV130: 10 ½" x 10 ½"
• EV200/EV240/EV300: 10 ½" x 21 ¾"

Contact your HVAC contractor or RenewAire for more information.

5.3 Motor Maintenance

The blower/motor package requires no lubrication. Vacuum clean the blower wheels when cleaning the energy exchange core. Manually rotate the blower wheel to confirm it is not rubbing against the blower inlet or housing.

5.4 General Cleaning and Inspection

Perform general cleaning and visual inspection when changing filters.

1. Remove paper, leaves, etc., from inlet and outlet screens.
2. Inspect for insect nests.

5.5 Service Parts

Diagram showing service parts for the EV130 unit, including filter clips, filters, core assembly, duct collar, hanging bracket, door, interlock switch, control board, and motor.

NOTE: Filters must be used to prevent the energy exchange core from becoming blocked by dust, which reduces unit efficacy. The supplied filters typically keep the core clean for many months; finer filters can be used but require more frequent cleaning.

6.0 Factory Assistance

For factory assistance, have the information from the "Unit Information" page ready (model and serial numbers). This helps identify the unit correctly.

To contact RenewAire Customer Service:

• Call: 800-627-4499
• Email: RenewAireSupport@RenewAire.com

About RenewAire

For over 40 years, RenewAire has pioneered indoor air quality (IAQ) enhancement in commercial and residential buildings. Their fifth-generation, static-plate, enthalpic-core Energy Recovery Ventilators (ERVs) optimize energy efficiency, reduce capital costs through load reduction, and lower operational expenses by minimizing equipment needs, leading to significant energy savings. RenewAire ERVs are competitively priced, easy to install, use, and maintain, offering a quick payback and the industry's best warranty with low claims due to innovative design, expert workmanship, and Quick Response Manufacturing (QRM).

As the North American pioneer of static-plate core technology, RenewAire is the largest ERV producer in the USA. Committed to sustainable manufacturing, their Waunakee, WI plant is 100% wind-powered and is LEED Gold, Green Globes certified, and ENERGY STAR Building certified. In 2010, RenewAire joined the Soler & Palau (S&P) Ventilation Group to access the latest energy-efficient air-moving technologies. Visit renewaire.com for more information.

RenewAire LLC, 201 Raemisch Road | Waunakee, WI | 53597 | 800.627.4499 | RenewAire.com

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