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0 ! 3.6.1 FULLY DUCTED SYSTEM (AS ILLUSTRATED IN SECTION 2.1) Stale air exhaust ductwork • Install the stale air exhaust registers where the contaminants are produced: kitchen, living room, etc. Position the registers as far from the stairway as possible and in such a way that the air circulates in all the lived-in spaces in the house. • If a register is installed in the kitchen, it must be located at least 4 feet (1.2 m) from the range. • Install the registers 6 to 12 inches (152 to 305 mm) from the ceiling on an interior wall OR install them in the ceiling. Fresh air distribution ductwork • Install the fresh air distribution registers in bedrooms, dining rooms, living room and basement. • Keep in mind that the fresh air registers must be located as far as possible from the stale air registers. • Install the registers in the ceiling OR 6 to 12 inches (152 to 305 mm) from the ceiling on an interior wall. The duct lenght should be at least 15’ (4.6 m). (The fresh air will then flow through the room and mix with room air, ensuring a continuous renewed airflow.) • If a register must be floor installed, direct the airflow up the wall. - 10 3. INSTALLATION (CONT’D) 3.6 INSTALLING THE DUCTWORK AND REGISTERS (CONT’D) 3.6.2 CENTRAL DRAW POINT SYSTEM (AS ILLUSTRATED IN SECTION 2.2) Stale air exhaust ductwork Same as for Fully Ducted System, described on point 3.6.1. Fresh air distribution ductwork WARNING When performing duct connections, always use approved tools and materials. Respect all corresponding laws and safety regulations. Please refer to your local building code. CAUTION When performing duct connections to the furnace supply duct, this duct must be sized to support the additional airflow produced by the HRV/ERV. Also, use a steel duct. It is recommended that the HRV/ERV is running when the furnace is in operation to prevent backdrafting inside HRV/ERV. 0 ! There are 2 methods for connecting the unit to the furnace/air handler: Method 1: Supply side connection • Cut an opening into the furnace supply duct at least 18 inches (0.5 m) from the furnace/air handler. • Connect this opening to the Fresh air to buildingport of the HRV/ERV (use steel duct, see figure beside). • Make sure the HRV/ERV duct form an elbow inside the furnace/air handler ductwork. • If desired, interlock (synchronize) the furnace/air handler blower operation (see Section 5). Method 2: Return side connection • Cut an opening into the furnace return duct not less than 10 feet (3.1 m) from the furnace/air handler (A+B). • Connect this opening to the Fresh air to buildingport of the HRV/ERV (see figure beside). NOTE: For Method 2, it is not essential that the furnace/air handler runs when the unit is operation, but we recommend it. If desired, interlock (synchronize) the furnace/air handler blower operation (see Section 5). VJ0036 B A VJ0035 MINIMUM 18” (0.5 M) A+B= NOT LESS THAN 10’ (3.1 M) STEEL DUCT - 11 3. INSTALLATION (CONT’D) 3.6 INSTALLING THE DUCTWORK AND REGISTERS (CONT’D) 3.6.3 SIMPLIFIED INSTALLATION (AS ILLUSTRATED IN SECTION 2.3) WARNING When performing duct connections, always use approved tools and materials. Respect all corresponding laws and/or safety regulations. Please refer to your local building code. CAUTION When performing duct connections to the furnace supply duct, this duct must be sized to support the additional airflow produced by the HRV/ERV. Also, use a steel duct. For a Return-Return installation, the furnace blower must be in operation when the HRV/ERV is in operation. 0 ! There are 2 methods for connecting the unit to the furnace/air handler: Method 1: Supply-return connection Method 2: Return-return without BA VJ0037 A+B= NOT LESS THAN 10’ (3.1 M) MINIMUM 18” (0.5 M) STEEL DUCT B A VJ0038 A+B= NOT LESS THAN 10’ (3.1 M) MINIMUM 3’ (0.9 M) Stale air intake • Cut an opening into the furnace/air handler return duct not less than 10 feet (3.1 m) from the furnace/air handler (A+B). • Connect this opening to the Exhaust air from buildingport of the HRV/ERV. Fresh air distribution • Same instructions as for Method 1 or Method 2, Section 2.6.2. For Method 2 (Return-return), make sure there is a distance of at least 3 feet (0.9 m) between the 2 connections to the furnace/air handler. NOTE: For Method 1, it is not essential to synchronize the furnace blower operation with the unit operation, but we recommend it. CAUTION If using Method 2, make sure the furnace/air handler blower operation is synchronized with the unit operation! See Section 5. - 12 3. INSTALLATION (CONT’D) 3.7 CONNECTING THE DUCTS TO THE UNIT Insulated flexible ducts Use the following procedure for connecting the insulated flexible ducts to the port of the unit (Exhaust air to outsideand Fresh air from outsideports). CAUTION Make sure the balancing dampers are set to their appropriate position before connecting the ducts to the ports. See Section 3.3. VJ0039 VJ0040 Pull back the insulation to Attach the flexible Pull the insulation Pull the vapor barri...

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