American Aldes Raises the Bar on Home Ventilation with Improved VentZone® Systems

American Aldes is pleased to announce the newly designed VentZone® System, the most advanced and effective home ventilation system on the market today. The system combines zoned bathroom exhaust plus whole-house ventilation with a single heat or energy recovery ventilator. For the homeowner, this means healthy indoor air quality throughout the home with extra boost ventilation in the bathrooms as needed while maximizing energy efficiency.

Traditional systems ventilate a bathroom in one of two ways; individual fans for each bathroom, or an inline bathroom fan connected to all bathrooms. The former is expensive as it requires purchasing, installing, and ducting several fans plus installing a vent in the exterior of the home for each bathroom. The later wastes energy and can over ventilate a home since all bathroom exhaust is either on or off and does not allow the homeowner to operate ventilation in each bathroom independently.

The innovative VentZone® System provides centralized, zoned bathroom exhaust plus whole house ventilation with a single heat or energy recovery ventilator. It gives the homeowner the ability to turn on individual bathroom ventilation as needed, yet only requires one ventilator to provide exhaust for all the bathrooms.

As air is removed from the bathrooms through ALDES’ patented Zone Register Terminals® (ZRT), it it passes through an ALDES heat or energy recovery ventilator (also called an air exchanger). As air is being exhausted from the home, fresh air is also being brought in at the same rate. The air exchanger tempers the incoming air using the energy from the outgoing air without the air streams mixing. This provides balanced ventilation, avoids negative pressure on the home, and improves indoor air quality while maximizing energy recovery. The technology built inside the air exchanger does this in the most energy efficient manner possible to avoid losing heating or cooling energy from within the home.

American Aldes’ VentZone® System and Aldes ZRTs are both past recipients of the Innovation Award for Ventilation by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE).

The company has built upon this already-successful system in several ways.

  • Near universal compatibility with advance dry contact control, allowing direct interlock with HVAC systems and most air exchanger controls.
  • Onboard low-voltage supply to power up to five Aldes Zone Register Terminals (ZRTs). The entire system is designed for ease of installation by a single trade in most cases.

Ventzone® kits are available for homes with 2-5 bathrooms. Each kit includes an ERV or HRV, Zone Register Terminals (ZRTs) and controls for each ZRT.
“Forward-thinking builders and HVAC installers have recognized the benefits of VentZone® System for years, and homeowners appreciate the energy savings year after year,” said Tom Heidel, Residential and Ecommerce Business Development Manager at American Aldes. “These improvements take the award-winning Aldes VentZone® System even further in terms of healthy indoor air quality, energy savings, and ease of installation.”

Click on the video below for a demonstration.

About American ALDES
American ALDES is the premier manufacturer of ventilation products and systems for homes, multi-family dwellings, hotels, schools and numerous other commercial applications. Products are designed for superior airflow control, energy-efficient performance, and a healthy indoor environment.
American ALDES is a based in Florida and is a subsidiary of the ALDES Group, an international, family owned group of more than 1,300 employees and 17 subsidiaries in 13 countries.

What is a Central Ventilation System?

Maybe you’ve heard the terms central ventilation, local ventilation and hybrid ventilation and wondered what’s the difference and why does it matter? Here’s a brief explanation to help sort it out.

A central ventilation system can be defined as a centrally located ventilator specifically designed to provide controlled, continuous, low-level movement of air in and out of the home for general ventilation. It contributes to healthy indoor air for everyone in the home, and protects the home from mold and mildew.

A central ventilation system provides low-level, continuous flow using one of three methods: supply, exhaust or balanced. The continuous low-level flow of air removes and dilutes the pollutants commonly found in homes. A central ventilation system should not be confused with a central heating or air conditioning handling unit.

Local ventilation, such as bathroom and kitchen fans, is designed to remove the high levels of humidity, odors, and other pollutants that are typically created by common activities such as take a shower or cooking. This type of ventilation eliminates these pollutants at the source, but it does not capture it all. Local ventilation methods do not have the distribution efficiency to provide the whole-house continuous ventilation that tight homes need.

Hybrid ventilation systems provide continuous low-level ventilation for the entire home, as well as local (or boost) ventilation for kitchens, laundry rooms and bathrooms, if necessary. Some systems have the additional benefit of a heat or energy recovery ventilator to maximize heating and cooling efficiency. See the Aldes VentZone® Zoned IAQ with Heat or Energy Recovery video for details and benefits of this method.

Obtaining Credits for Ventilation Systems under LEED for Homes Program

This document is a guideline of the maximum potential points American Aldes ventilation products can contribute to obtaining certification under the U.S. Green Building Council’s (USGBC) LEED for Homes Rating System. Future documents will summarize points available from other LEED programs such as LEED for Homes Mid-rise; LEED Homes Initiative for Affordable Housing; REGREEN Residential Remodeling Program; and LEED for New Construction. This information is based on the LEED for Homes Rating System, January 2008.

The information in this document is intended to help promote participation in the LEED for Homes program and show how American Aldes ventilation products contribute towards available Certification Levels. This document is strictly an interpretation of the program; final credit approval is subject to the interpretation of the USGBC and the approved LEED for Homes Provider.

American Aldes ventilation products provide solutions to meet Prerequisites under the Indoor Environmental Quality (EQ) category and up to 18 points in the LEED for Homes Rating System. These points can be a simple way to obtain a significant portion of the LEED for Homes certification thresholds.

Download the full document

Clean Air Solutions for Homes Impacted by Wildfires

American Aldes has developed clean air solutions that positively pressurize homes with filtered fresh air to help prevent the infiltration of unwanted contaminants. Wildfires can spread ash and soot for hundreds of miles. Homeowners often complain of dust and ash build-up inside their homes, even though they are far removed from the danger of flames. Most people do not understand the cause or how this may affect their health, and even fewer understand that a solution exists to minimize this phenomenon.

Ash, soot, and dust enter homes and apartments through leaks and infiltration points such as windows, doors, and common crevices around wall penetrations. Wind and negative pressure, which is caused by exhaust fans or leaky air conditioning duct systems, are generally the cause for “pulling” these contaminants into the home. Similar to other hazardous contaminants, ash and corresponding dust can cause health problems for millions of people.

More than ever, homeowners are in need of solutions that filter the air brought into their homes so their families are not exposed to the dangerous particulates caused by wildfires. The EPA reports that there are approximately 2 million emergency room visits per year in the United States due to asthma attacks, and 19% of families have at least one asthmatic person. The toxic smoke and ash resulting from wildfires can severely aggravate asthmatic symptoms and can be problematic and even dangerous for all people in higher concentrations.

American Aldes recommends keeping homes sealed as tightly as possible and using mechanical ventilation to provide the clean, fresh air that is necessary for good health. Sealing a home tightly without providing a source of filtered, fresh air from outside is dangerous and can trap all kinds of pollutants inside a home. The EPA estimates that the air inside a home is 2 to 5 times as polluted as the air outside a home.

Filtering Supply Ventilator (FSVS) filters outside air to remove contaminants and particulates before introducing a continuous, low-volume of fresh air into a home. This fresh air would then be cleaned for distribution throughout the home, either by an existing air conditioning and/or heating system’s ducts, or directly with its own duct system.

Blending Ventilator (BVS) is a type of supply ventilator that also blends conditioned air from inside a home with precise amounts of fresh air from outside the home before distributing the tempered-filtered air to habitable living spaces. A Blending Ventilator provides the additional benefit of filtering both indoor and outdoor air. Important Note: If fires are in very close proximity, fresh air supply ventilation systems should be turned off to avoid inducing sparks or embers into a home.

Both of these filtered supply air strategies can create positive air pressurization of the home, preventing unwanted contaminants such as smoke, ash and other volatile organic compounds from entering the home through uncontrolled leakage points.

As an example, thousands of homes and apartments surrounding airports use American Aldes BVS and FSVS Ventilators to provide filtered fresh air under the federally funded FAA Noise Mitigation Program. These types of programs are intended to minimize noise, airplane exhaust soot, and pollution from entering homes surrounding airports.

BVS and FSVS fans are available as kits or standalone fans. See Residential System Solutions and Fans for more details.

Upper East Side, 83-unit Luxury Condominium Residence to Include Aldes Products

New York City’s Upper East Side is known for its luxury high rises, stylish boutiques, and upscale restaurants. One of newest additions is The Kent, an elegant 30-story, 83-unit condominium residence just a few blocks from Central Park. Among the amenities are an indoor pool and sauna, fitness center, sound lounge, canine spa, and zoned ventilation with centralized heating and cooling systems that include American Aldes Zone Register Terminals (ZRTs) and Constant Airflow Regulators (CARs).

Aldes ZRTs provide on-demand boost airflow, typically used in bathrooms and laundry rooms to exhaust humidity and odors. Aldes CARs automatically regulate airflow in duct systems to constant rates. These ZRTs and CARs are frequently the preferred ventilation products for multi-family buildings such as apartments and condominiums for simplicity and performance.

Architect Beyer Binder Belle has offices in New York City and Washington, D.C. and have been involved in such high profile projects as Grand Central Terminal, Rockefeller Center, the Apollo Theater. New York-based Interior designer Champalimaud has won awards for projects across the globe. Developer Extell’s full service real estate development team has nearly three decades of experience in New York and beyond.

The Kent topped out earlier this year and is expected to be complete in early 2018. The two to five-bedroom condominium residences are expected to bring $2.4M to over $20M each.

Aldes ZRTs and CARs have been installed in hundreds of apartments, condos, and other multifamily buildings across the United States and beyond. In New York City alone, manufacturer’s representative A.D.E. Systems has facilitated the sale of Aldes products in The Enclave at Cathedral, Citizen 360, 53w53, 520 Park Avenue and many others in the Big Apple. To see other projects where Aldes products have recently been installed, please visit our Featured Projects Map.

Nearly 1,000 Aldes airflow & zone control products to be installed in The Legacy Minneapolis

Take a drive along the Mississippi River in the Mill District of Minneapolis and you’ll see one of the city’s largest developments underway, The Legacy Minneapolis. The 374-unit condo development borders Gold Medal Park and is spread out over 3 connected sections; a 14-story tower, and 8-story tower and a 17-story tower. The staggered design is intended to visually separate what would have otherwise been one large tower per the original building plans. Inside, American Aldes Zone Register Terminals (ZRT) and Constant Airflow Regulators (CAR) will help maintain energy-efficient, effective airflow throughout the building to each residence.

Aldes ZRTs provide on-demand boost airflow, typically used in bathrooms and laundry rooms to exhaust humidity and odors.  Aldes CARs automatically regulate airflow in duct systems to constant rates. These ZRTs and CARs are frequently the preferred ventilation products for multi-family buildings such as apartments and condominiums for simplicity and performance.

Shamrock Development—the company spearheading The Legacy Minneapolis—is no stranger to the city. Shamrock has developed over 5,000 lots over the past 30 years throughout the metropolitan area, with the late Jim Stanton at the helm. Mr. Stanton passed away in June, 2017. The building has been designed with an eye to providing residents with common spaces and a sense of community, including roof terraces, exercise space, a dog run, rain garden, pool, spa, roof deck with lawn bowling, fire bowls and gas grills. It is expected to open in fall 2018.

Aldes ZRTs and CARs have been installed in hundreds of apartments, condos, and other multifamily buildings across the United States and beyond. In Minneapolis alone, Aldes products have been installed in JW Marriott Minneapolis Mall of America, Pentagon Apartments, The Bridges, Radisson Blu Minneapolis, 4 Marq and others. Please visit our Featured Project Map to learn more.

5 Effective Ventilation Solutions for Condos & Apartments

Shared walls, air balancing, energy efficiency, stack effect, changes in local code…engineers face these challenges and more when designing centralized ventilation systems for multi-family dwellings. It’s no easy task to comply with codes and regulations, plus satisfy building owners and developers. American Aldes and our manufacturing representative partners have worked alongside engineers for nearly 35 years designing cost-effective solutions that are easy to integrate into designs, install, and maintain. Here’s a look at five popular solutions from Aldes that’ll help you design ventilation systems for apartments and condominiums without the headache.

  1. The most configurable line of split-system Heat and Energy Recovery Ventilators with sizes up to 10,000 CFM. Each unit is built to your specifications, with multiple core options, duct configurations, supplemental heating and cooling, economizer controls, and they’re AHRI Certified. HRVs and ERVs exhaust stale air and humidity from buildings and bring in fresh air while maximizing energy efficiency and reducing the load on heating and cooling systems.
  2. Constant Airflow Regulators (CAR-II) correct stack effect by automatically adjusting to the changes in static pressure, so energy is not wasted and optimum air quality is maintained. CARs don’t require any electric or pneumatic sensors or controls and are a low-cost solution for balancing ventilation systems, eliminating the need for on-site balancing and repeat maintenance, keeping the system running at optimal performance year-round. These are perfect for new construction or retrofit projects.
  3. Zone Register Terminals (ZRT) provide energy saving demand control, self-balancing ventilation without the need for individual fans in bathrooms or other high humidity areas. They provide up to four different control schemes without the need for pneumatic, electronic or DDC control systems. Parallel Damper In-Line Zone Register Terminals (ZRT-PDIL) also replace individual fans or VAV terminals, and provide combination low-flow indoor air quality ventilation and on-demand high flow spot ventilation using the same central exhaust or supply fan system. The ZRT-PDIL is your simple solution to provide makeup air for equipment like kitchen range hoods, or demand based ventilation for high volume applications.
  4. Constant Exhaust Registers and Constant Supply Registers (CERs and CSRs) combine the constant airflow regulators (explained in #2 above) with an exhaust or supply grille constructed of heavy-gauge extruded aluminum. Airflow rates are factory set based on what is specified, and are quickly installed like any grille, so no additional labor is required. Need one of these with a fire damper? We’ve got it. Constant Exhaust or Supply Registers with Fire Dampers (CER-FEA or CSR-FEA) regulate airflow and include a grille and a two-hour rated fire damper.
  5. Constant Exhaust Grille (CEG-II) automatically regulates airflow and can be adjusted to distinct pre-calibrated airflow settings, making it easy for the contractor to make on-site adjustments if ventilation demand changes.

If you’re thinking that looks interesting, but how do I know it works well? Don’t just take our word for it. Visit our project map to see a small sampling (and by that we mean hundreds!) of multi-family buildings across the nation that have recently installed these products and others.

Aldes has a full lineup of products for centralized systems, but if it’s unitized/compartmentalized you’re designing, we have cost effective, energy efficient systems for that too. In fact, we’ve got compact sized heat and energy recovery ventilators perfect for apartments or condos, and ENERGY STAR rated fan small enough to fit into tight spaces. Have look at these options at

5 Benefits of De-Centralized Ventilation in Schools

Compare the number of students in a typical classroom to the number of employees in the average office space of the same square footage and you’d find the density in schools is 3 times higher. Bringing in the proper amount of outdoor air and delivering it to each space efficiently can be a challenge. Couple that with the varying uses and activity levels of each classroom and there can leave a high potential to save—or lose—ventilation costs on each classroom. De-centralized ventilation systems, in which each classroom or zone can be managed separately by a light commercial heat or energy recovery ventilator, can have some big benefits. Here are a few worth considering.

  • Demand-based ventilation. Classrooms may be filled with students from 8 am to noon two days per week, and full the entire school day on the other three days. Rather than running at full ventilation rates on all 5 days, districts save money by ventilating only on the days and times it’s needed.
  • Flexible maintenance schedule. De-centralized ventilation systems use smaller heat or energy recovery units that can be maintained without shutting down ventilation to the entire building; only the classroom or zone it manages. Facility staff can plan on performing maintenance during the school day when students are at lunch or other activities.
  • Simple to control and balance. It’s simple to implement a control strategy with light commercial heat or energy recovery ventilators since the system is not dependent on VAV systems. Even better, since the ventilator is dedicated to one classroom or zone, there are no long duct runs, and balancing is quick and easy with only 1 (or a few) connection(s) per fan versus central systems which may have dozens of connections per fan.
  • Convenient access. Select light commercial heat or energy recovery ventilators are small enough to fit above drop ceilings, so they can be accessed easily without the liability and weather-related challenges of accessing a rooftop or dedicating space in a mechanical room.
  • Improved motor performance. All American Aldes light commercial heat or energy recovery units have direct-drive backward-inclined motors for improved performance and reduced maintenance since there are no belts to maintain or change.

Only Aldes makes light commercial heat and energy recovery ventilators with plate-type exchangers rather than wheels, so there’s no moving parts and they easily slide out for cleaning; dual side access doors for building maintenance staff to service the unit from either side; and multiple speed blowers built into the unit controls as a standard feature. Aldes light commercial series are simple to install and require no special wiring, just plug them in.

While de-centralized systems have plenty of benefits, some districts may prefer centralized systems. Either way, Aldes has solutions with a wide range of heat and energy recovery ventilators just right for schools, from 650 CFM all the way up to 10,000 CFM. In fact, schools across the country are choosing a variety of Aldes HRVs and ERVs for their durability, energy savings, low maintenance, and competitive pricing. Learn more at

American Aldes and HTS Texas Secure Sale of 173 Commercial ERVs in Prestigious School District

American Aldes’ and their North Texas representative Heat Transfer Solutions (HTS) of Texas has secured sales of 173 Energy Recovery Ventilators serving four schools in the Frisco Intermediate School District.  Frisco, Texas is located just north of Dallas, and is one of the nation’s fastest growing cities in the United States, coming in fourth with a population growth of 6.3% between 2014 and 2015 according to the U.S. Census Bureau.

The Frisco Intermediate School District is also undergoing tremendous growth with thousands of new students coming into the school district every year.  Business expansion and corporate relocations to the area, resulting in new jobs in several sectors and a boom in residential housing have contributed to population growth and the need for more schools.

To accommodate the growing student population, the district is adding several new schools across four campuses. The E650 and E1100series light commercial energy recovery ventilators are being installed in the new Memorial High School (85 ERVs); Lawler Middle School (36 ERVs); Tally Elementary School (26 ERVs); and Liscano Elementary School (26 ERVs).

Part of the challenge was adapting the standard light commercial ERVs to meet some unique design criteria found in each school.  It required a collaborative effort between the American and Canadian Aldes teams to quickly make the changes necessary in order to secure the projects.

Aldes’ representative HTS is the largest independent commercial HVAC manufacturers’ representative in North America. The company represents more than 100 HVAC suppliers and has close to 600 employees in 16 cities across Canada and the United States.

“HTS recognized the opportunity to provide these schools with Aldes energy recovery ventilators that will save the district on energy costs and provide healthy indoor air for thousands of students,” said Tom Heidel, National Distribution Sales Manager at American Aldes. “We are pleased that HTS continues to be aggressive in securing specifications and sale for our air exchangers and look forward to future growth with HTS.”

Download the School Ventilation brochure

New expansion at Gaylord Texan Resort adds 300 guest rooms, precise airflow provided by Aldes ZRTs

American Aldes, through its partnership with HTS Texas, has sold more than 600 Zone Register Terminals to be installed in the Gaylord Texan Resort and Convention Center’s new expansion, Vineyard Tower, scheduled to open in 2018.

Vineyard Tower will add 303 guest rooms and 86,000 square feet of meeting space to the already-sprawling 1,511 guest room resort and convention center. This will make it one of the top three largest non-gaming convention center hotels in the United States.

Aldes Zone Register Terminals (ZRTs) provide on-demand boost airflow, typically used in bathrooms and laundry rooms to exhaust humidity and odors. When combined with an optional airflow regulator, they can also be used for continuous low-volume airflow to maintain healthy indoor air. ZRTs are frequently the preferred ventilation products for multi-unit buildings such as apartments, condominiums and hotels.

In the guestrooms at Vineyard Towers, ZRTs will provide constant balanced and regulated exhaust and makeup air in each guestroom at the recommended rate at all times, and provide efficient demand ventilation when needed; ensure healthy indoor air quality for guests; control stack effect; and maximize energy efficiency in the process.

Gaylord Hotels, a part of Marriott International, Inc., are well-known for their sprawling resort and convention centers and “everything in one place” concept. In addition to luxurious guest rooms, these properties include retail shops, spas, outdoor lounges, restaurants, fitness centers, pools, and a variety of meeting spaces, all in spectacular settings.

American Aldes has a longstanding relationship with Marriott hotels, and has provided engineering solutions to the hotel industry that come with green savings. Marriott incorporated Aldes products into its global design standards and saves an estimated $200 per room in energy savings annually with ZRTs versus traditional ventilation methods. (See the case study)

Marriott International, Inc. is the world’s largest hotel company based in Bethesda, Maryland, USA, with nearly 6,000 properties in 120 countries and territories. Marriott operates and franchises hotels and licenses vacation ownership resorts. Gaylord Hotels are among the company’s 30 leading brands.

Vineyard Tower is currently under construction and will open in late 2018.