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Hersteller: Lifebreath Dateigröße: 2.05 mb Dateiname: Unterrichtssprache:

A good bead of high quality caulking (preferably acoustical sealant) will seal the inner flexible duct to both the HRV/ERV port and the weatherhood prior to clamping. To minimize air flow restriction, the flexible insulated duct that connects the two outside weatherhoods to the HRV/ERV should be stretched tightly and be as short as possible. Twisting or folding the duct will severely restrict air flow. See below for the recommended connection of flexible insulated ducts to the the outside weather- WEATHERHOODINSTALLATION COLLARISSUPPLIEDTO. ENSUREVAPOURBARRIER. EXTERIOR WALL(sideview)IS100%SEALEDTO WALLPLATE12"galvanizedpipesuppliedSCREEN 1/4"(6mm)SCREEN (frontview) 1.. ThermalCollarslidesovergalvanized. sleeveofWeatherhood. 2.. FastenThermalCollartoBelt. 3.. SlidetheInsulatedFlexibleDuctingover. theWeatherhood'sgalvanizedsleeveand. fastenittotheThermalCollar. 4.. Hoodishingedtoallowforeasyaccess. . forcleaningofbirdscreen. hoods and the HRV/ERV. Warmside Ducting To maximize airflow in the ductwork system, all ducts should be kept short and have as few bends or elbows as possible. Forty-five degree elbows are preferred to 90° elbows. Use “Y” tees instead of 90° elbows whenever possible. All duct joints must be fastened with screws, rivets or duct sealant and wrapped with a quality duct tape to prevent leakage. We recommend aluminum foil duct tape.Galvanized ducting from the HRV/ERV to the living areas in the house is recommended whenever possible, although flexible duct can be used in moderation if necessary.To avoid possible noise transfer through the ductwork system, a short length (approximately 12 " or 300 mm) of non-metallic flexible insulated duct should be connected between the HRV/ERV and the supply/ exhaust ductwork system. The main supply and return lines to/from the HRV/ERV must be 6 inches (150 mm) minimum. Branch lines to the individual rooms may be as small as 4 inches (100 mm), but 5 inch (125 mm) lines are preferred . All ducts running through attics and unheated spaces must be sealed and insulated to code. 23 Supply Air Ducting In homes without a forced air furnace, fresh air should be supplied to all bedrooms and living areas, excluding bathrooms, kitchen and utility areas. It should be supplied from high wall or ceiling locations. Grilles that diffuse the air comfortably such as the Techgrille™ are recommended. If the floor is the only option available, then special care should be taken in locating grilles. Areas such as under baseboard heaters will help to temper the air. Also optional inline duct heaters are available for mounting in the supply duct work to add heat if required. In homes with a forced air furnace, you may want to connect the HRV/ERV to the furnace ductwork (see information below). Direct Connection to Furnace Ductwork Should you wish to hard duct the supply air directly into the cold air return of the furnace, remember to check the air flow balance of the HRV/ERV with the furnace fan both "ON" and "OFF" to determine that it does not imbalance the unit more than 10%. Also, it is advisable to include a short length of fabric flex duct or other non-metallic connector in this hard ducted line in order to keep the HRV/ERV separately grounded (electrically) from the furnace. This will avoid a possible shock hazard to service people if a short to ground develops in one of the devices. Indirect Connection to Ductwork If permitted by local codes, an indirect connection may be made between the HRV/ERV supply duct and the furnace return plenum. The fresh air from the unit may be directed at a grille installed in the cold air return duct of the furnace. The fresh air supply outlet from the unit should be no closer than 4 inches (100 mm) and no more than 12 inches (300 mm) from the grille. Stale Air Exhaust System The stale air exhaust system is used to draw air from the points in the house where the worst air quality problems occur. It is recommended that return air ducts are installed in the bathroom, kitchen, and laundry room. Additional return air ducts from strategic locations (i.e. greenhouse, atrium, swimming pool, sauna, etc.) may be installed. Also, the furnace return duct may be used to exhaust from. In this method, the exhaust air is not ducted back to the HRV/ERV with "dedicated lines" from bathrooms, kitchens, etc. Instead, the exhaust air is drawn out of the cold air return of the forced air furnace. This method has become popular and provides good ventilation when installed in accordance with the instructions. The furnace blower must be running when the unit is operating for this system to be effective. Dampers and Grilles The use of balancing dampers and/or adjustable grilles to balance the flow rates into various rooms is recommended. We suggest TECHGRILLE™ air diffusers. • The TECHGRILLE™ is available in 4", 5", 6" and 8" (100, 125, 150 and 200 mm) sizes. • The TECHGRILLE™ is a round, fully adjustable grille, which provides superior, quiet air distribution. Techgri...

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