ERV Questions & Answers

What is the difference between an HRV and an ERV?

The core in an HRV (Heat Recovery Ventilator) transfers heat from one air stream to the other. This is called sensible heat. 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. This (moisture transfer) is called latent heat.

Enthalpic - what does it mean?

Enthalpy is the term used to describe the energy content of air. This energy is a combination of the sensible and latent heat. Therefore, a core which transfers energy is called an enthalpic core.

Is an ERV better than an HRV?

NOT NECESSARILY!! In cold climates such as most of North America, an HRV works better than an ERV. This is because the air inside the home during the winter months will be more humid than the outside air. An ERV would transfer the latent heat (humidity) from the exhaust air back into the incoming airstream. This will aggravate moisture problems in the home and encourage the growth of mold and mildew. If the air in the home is too dry for comfort, an ERV will not help. A humidifier should be used to increase the humidity to a comfortable level.

and damp situation. In fact, about 2/3 of the energy used by the air conditioner system is to remove moisture. Therefore, when ventilating in the summer, less moisture brought into the home means less work for the air conditioner, and energy savings for you.

During 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.

What's the difference between this type of core and a rotary type?

Here's a list of characteristics of the fixed plate core.

1.No rotating parts, so maintenance is easy and the unit lasts a long time.

2.It is very flexible in terms of installation.

3.The core can easily be changed.

4.Because the supply and exhaust air streams are completely separate, there is very little cross leakage of any dust or germs.

Can the core become clogged with dust?

Because 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.

Where do you use an ERV instead of an HRV?

An ERV is recommended for warm, humid areas with heavy air conditioning use. As there is no defrost in an ERV it is not recommended for areas where the temperature drops below -4˚C (25˚F).

Why transfer moisture in the summer (cooling season)?

The enthalpic core will allow moisture to be transferred from a humid air flow to a dry air flow. This property is useful in the cooling season if an air conditioning system is used to lower the indoor humidity. You will then have dry, cool air in the exhaust of the ERV, and warm humid air in the supply stream. With these conditions, the ERV will be able to transfer the moisture and heat of the supply air to the exhaust air. In this way, the ERV will supply to the home air which is cooler and drier than outside. Remember that an ERV is not a dehumidifier, and on its own will not take moisture out of the air.

So why use an ERV?

A properly operating air conditioner will not only lower the temperature in your house, but will also lower the humidity level. This prevents an uncomfortable cold

What is the maintenance?

About once a year you should use a vacuum cleaner to remove the dust from the core's surface. DO NOT WASH WITH WATER!!

Is an air filter needed?

To prevent clogging of the core, an air filter should always be installed on the supply and exhaust sides of the core.

How much ventilation do I need?

During seasons when your windows and doors are closed, the ERV should operate continuously when the dwelling is occupied, and either continuously or intermittently when not occupied.

For most installations the ERV will normally be set to operate continuously on low speed with the option of going to high speed as the need arises. For example; if you are entertaining and there is a large number of people present (some may be smoking), the unit should be switched to high speed.

Your ERV may be equipped with automatic or manual switches, but all ERVs will have a manual speed control override.

155MAX, 95MAX, 200MAX specifications

Lifebreath is well-known for its innovative heat recovery ventilators that enhance indoor air quality while conserving energy. Among their acclaimed models, the Lifebreath 150SP, 200MAX, 150MAX, and 200STD stand out for both their functionality and design, delivering optimal performance for various residential and commercial applications.

The Lifebreath 150SP is designed for spaces requiring effective air exchange while maintaining energy efficiency. This model boasts a compact design, making it ideal for smaller homes or apartments. One of its main features includes a top-mounted control panel with a user-friendly interface, allowing for easy adjustment of settings. Equipped with a high-efficiency heat exchanger, the 150SP effectively transfers heat from the outgoing stale air to the incoming fresh air, minimizing energy loss. Additionally, the unit operates quietly, ensuring that comfort is not compromised.

On to the 200MAX, this model is engineered for larger spaces. With increased airflow capacity, it ensures consistent air quality in bigger areas while optimizing energy consumption. The 200MAX features advanced filtering systems that capture dust, pollen, and other allergens, promoting a healthier indoor environment. Its built-in defrosting system operates automatically, enhancing efficiency during colder months. The 200MAX also supports optional accessories, such as a programmable timer and an energy recovery ventilator, allowing users to customize performance to meet specific needs.

The Lifebreath 150MAX pairs the efficiency of the 150SP with added versatility. This model is suitable for mid-sized spaces and comes equipped with a dual motor system. This unique feature provides users with the flexibility to adjust airflow independently, accommodating varying room conditions. The 150MAX excels in both heating and cooling modes, ensuring comfort year-round.

Finally, the Lifebreath 200STD offers a straightforward approach to ventilation without compromising on performance. Designed for standard residential applications, the 200STD is easy to install and maintain, featuring a washable pre-filter. This model is energy efficient and operates quietly while delivering excellent air exchange rates, making it perfect for families seeking reliable indoor air management.

In conclusion, the Lifebreath range—150SP, 200MAX, 150MAX, and 200STD—showcases superior design and cutting-edge technology. With their focus on energy efficiency, user comfort, and adaptable features, Lifebreath models uphold a promise of high indoor air quality and sustainable living. These systems not only contribute to a healthier environment but also reduce energy costs, making them an ideal investment for any modern building.