Bryant HEAT RECOVERY VENTILATOR HRVBB Guide de dépannage

83 The HRV systemComponents of an HRV systemAn HRV system consists of the following equipment:• insulatedductsforincoming(fresh)andoutgoing(

9FIGURE 1Components of a ventilation system using an HRVDuring the heating season, an HRV recovers heat from the outgoing, stale household air and use

10Energy recovery ventilatorsEnergy recovery ventilators (ERVs) are a type of HRV that can exchange both heat and moisture. An ERV can give you more c

11FIGURE 2An HRV with direct ductworkAn HRV can also be installed to work with a forced-air furnace system, as shown in Figure 3. In this case, the HR

12FIGURE 3An HRV installed with a forced-air furnace systemHigh-efficiency motorsSeveral years ago, manufacturers started to introduce a high-efficiency

13when used for continuous circulation. During the summer months, this motor also saves energy by reducing the load on an air-conditioning system.Th

14Table 3 shows the relationship between inflation times and airflow rates. Although this technique is not precise, it will help you estimate the rate o

15pulled back into the house, where you could inhale them. Negative pressure can also increase the rate of entry of undesirable gases and moisture fro

16FIGURE 4Effects of air pressure on a houseAlthough your HRV was balanced during installation, have the system checked by a qualified contractor once

174 Operating your HRVAfter an HRV has been installed, balanced and functioning, its ongoing operation is relatively simple. You can help ensure the

For additional copies of this or other free publications on energy efficiency, contact:Energy PublicationsOffice of Energy EfficiencyNatural Resources Ca

18Low-speed operationTo ensure the removal of indoor pollutants and the supply of fresh outdoor air, an HRV should be operated on low speed continuous

19Frequent or even continuous high-speed operation may be desirable during the first year after a house is built, to exhaust the moisture and pollutant

20Non-heating season operationThe best strategy is to operate your HRV continuously year-round, even during the non-heating season. Except for adjusti

21TABLE 4ATier 1 (effective January 1, 2010) SRE and minimum fan efficacy requirements Minimum Minimum Minimum fan efficacy with 0°C SRE at 0°C SRE

225 Routine maintenanceIf your HRV breaks down, hire a trained contractor to repair it (see “Finding a contractor to service your HRV,” page 15). Do

23 Dirty filters can reduce ventilation efficiency, result in unbalanced airflows and even cause the unit to shut down if it is equipped with an airflow

242. Clear the exterior intake and exhaust vents of obstructions. Check the outside vents regularly to ensure that the screen openings are not obstru

25FIGURE 6Checking exterior inlets and outlets5. Service the fans. The fans on many HRVs are designed to operate continuously without lubrication. Yo

267. Arrange for annual servicing. Your HRV should undergo annual general servicing by a contractor who is accredited by the Heating, Refrigeration a

276 HRV maintenance chartUnless otherwise recommended by the manufacturer, service your HRV according to the following schedule. If the manufacturer

1Heat Recovery VentilatorsProduced byNatural Resources Canada’s Office of Energy EfficiencyEnerGuideThe Heating and Cooling Series is published by Natur

28Contractors Telephone number

297 HRV troubleshooting guideAs with any appliance, problems can arise with your HRV even if it is operated according to the manufacturer’s instruct

30Problem Possible causes and solutionsHRV runs at one speed only•Checkallswitchessettings.•Iftheunitremainsformalfunctionsbyatthesames

318 Need more information?Order free publications from the OEEThe Office of Energy Efficiency (OEE) of Natural Resources Canada offers many publicatio

32Other sources of informationFor more information related to indoor air quality, contact the Canadian Housing Information Centre at Canada Mortgage a

Natural Resources Canada’s Office of Energy EfficiencyLeading Canadians to Energy Efficiency at Home, at Work and on the Road

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3Contents1. Introduction ...42. The need for mechanical ventilation ...5 Circulating fresh air in new h

41 IntroductionThe importance of ventilation in today’s more energy-efficient homes is universally recognized. Introduced as a requirement for airtigh

52 The need for mechanical ventilationCirculating fresh air in new homesNew homes are built to be airtight. This limits the uncontrolled flow of air

6*CAUTION: Do not rely on an HRV to remove combustion by-products from your home or to supply the combustion air requirements of fuel-burning applianc

7How much ventilation does your home need?The capacity of a home’s ventilation system is usually based on the number of rooms in the house. HRV capaci