This property is useful in the cooling season if an air conditioning system is used to lower the indoor humidity. The enthalpic core will allow moisture to be transferred from a humid air flow to a dry air flow. Why transfer moisture in the summer (cooling season)? As there is no defrost in an ERV it is not recommended for areas where the temperature drops below -4 ˚C (25 ˚F). Where do you use an ERV instead of an HRV?Īn ERV is recommended for warm, humid areas with heavy air conditioning use. Because the supply and exhaust air streams are completely separate, there is very little cross leakage of any dust or germs.īecause the surface of the core is a turbulent flow area, dust sticks to it easily however, because the inside of the element is a laminar flow area, virtually no dust sticks to it. It is very flexible in terms of installation.Ĥ. No rotating parts, so maintenance is easy and the unit lasts a long time.Ģ. Here's a list of characteristics of the fixed plate core.ġ. What's the difference between this type of core and a rotary type? Therefore, when ventilating in the summer, less moisture brought into the home means less work for the air conditioner, and energy savings for you.ĭuring the winter, an ERV recovers some humidity from the exhaust air, reducing the need for humidification, if the required ventilation rate would make the home too dry. In fact, about 2/3 of the energy used by the air conditioner system is to remove moisture. A humidifier should be used to increase the humidity to a comfortable level.Īnd damp situation. If the air in the home is too dry for comfort, an ERV will not help. This will aggravate moisture problems in the home and encourage the growth of mold and mildew. An ERV would transfer the latent heat (humidity) from the exhaust air back into the incoming airstream. This is because the air inside the home during the winter months will be more humid than the outside air. NOT NECESSARILY!! In cold climates such as most of North America, an HRV works better than an ERV. Therefore, a core which transfers energy is called an enthalpic core. This energy is a combination of the sensible and latent heat. This (moisture transfer) is called latent heat.Įnthalpy is the term used to describe the energy content of air. The term ERV (Energy Recovery Ventilator) is usually used to describe a unit with an enthalpic core that transfers moisture as well as heat from one air stream to the other. The core in an HRV (Heat Recovery Ventilator) transfers heat from one air stream to the other.
What is the difference between an HRV and an ERV? The ERV will transfer both sensible and latent heat from the incoming fresh air to the outgoing stale air thereby reducing the load (due to ventilation) on the air conditioning system.ĮRVs are not suitable for climates where the temperature drops below -4˚C (25˚F).Īll Heat Recovery Ventilators carry a Lifetime Warranty on the heat recovery core and a 5 (five) year replacement parts warranty.Īll Energy Recovery Ventilators carry a 5 (five) year warranty on the energy recovery core and a 5 (five) year replacement parts warranty.ĭuring the warranty period, if any core experiences a failure or perforation caused by normal use while owned by the original purchaser, a replacement core (FOB our plant) will be supplied at no expense. An ERV is designed for use in warm humid areas with heavy air conditioning use. During summer months when the indoor space is air conditioned, the Heat Recovery Ventilator will help in cooling the incoming fresh air with the stale air that is being exhausted.Īn Energy Recovery Ventilator (ERV) is designed to provide fresh air into a building while exhausting an equal amount of stale air. During the winter months, the incoming cold fresh air is warmed by utilizing the heat recovered from the stale air before it is exhausted to the outdoors. Ī Heat Recovery Ventilator (HRV) is designed to provide fresh air into a building while exhausting an equal amount of stale air. Installing Ducting from Weatherhoods to the HRV/ERV.
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