Indoor air quality affects us daily, but we don't always consider it. We spend more than two-thirds of our time indoors, which means we're always breathing in air quality. This can have a significant impact on our health. Cambridge Air Solutions has over 60 years of experience in the industrial cooling industry, and we understand the importance of indoor air quality (IAQ). 

What is Indoor Air Quality? 

Indoor air Quality (IAQ) refers to the air quality in buildings and structures (EPA). Buildings with good IAQ have:

  • Ventilation
  • Control of Internal and External Pollutants
  • Comfortable Temperature
  • Comfortable Humidity Levels

Why is Good Indoor Air Quality So Important?

People spend more than two-thirds of their lives indoors, source. Poor indoor air quality can lead to long-term health issues, source. Good IAQ can also prevent the buildup of hazardous gases such as carbon monoxide. 

Increased Production

Employees need more than just a leather office chair to be comfortable. Air quality is often overlooked when thinking about employee comfort. If your employees aren't comfortable, chances are they are stressed out in the workplace. Employees that are comfortable in their workplace are much more productive employees. 

Slows the Spread of Viruses

Buildings with good IAQ are well-ventilated, which helps slow the spread of viruses such as COVID-19 and the Flu. This means less sickness in the workplace and a safer environment for your employees. A healthier workplace is also a wealthier workplace, according to a Harvard study. Better health leads to less sick leave and more productivity, which leads to greater profits. Good IAQ in your building can also reduce allergy or asthma triggers. There are more pollutants in the air when IAQ is low due to poor ventilation. This can cause some diseases, such as asthma, to flare up. 

How to Improve Indoor Air Quality

Invest in your employees with a system from Cambridge Air Solutions. We are a leading manufacturer of commercial and industrial heating, ventilation, and evaporative cooling products. Both our S-Series and SA-Series utilize 100% fresh air to dilute contaminants. This eliminates many of the air quality problems associated with traditional heating systems that recirculate indoor air. Similarly our M-Series offers superior IAQ as it uses only fresh air from outside and noes not recirculate contaminated indoor air. Our ESC-Series also uses 100% outside air to provide tempered make-up air and building cooling. 


Learn More

With the right air quality management system, you can breathe easy. You and your employees will be able to spend more time indoors without worrying about potential health problems caused by poor indoor air quality. To learn more about Cambridge Air Solutions products for improving your indoor air quality, contact a rep today. 


Evaporative cooling has become the system of choice for many business owners in dry climates, utilized to cool their facility while keeping energy consumption and operational costs in check, especially compared to traditional compressor-based cooling. The sheer size of the commercial and industrial facilities that are effectively tempered by evaporative cooling offers insight to the significant savings that can be realized first by the system’s installation and then its continued optimization.

How Do Evaporative Coolers Work?

To optimize performance, we first have to understand how an evaporative cooling system works. The design is simple, yet complex: provide cool, tempered air by converting warmer, dry air through a series of evaporative processes to draw out the air’s natural heat and inject cooler air into your work space. 

Often compared to “swamp coolers” in the southwestern United States, evaporative cooling units utilize more advanced technology that enable them to serve as viable alternatives to conventional cooling beyond just the Southwest and for larger spaces.

There are direct and indirect technologies available in evaporative cooling, essentially designated by the moisture level in your climate and whether or not additional moisture is desired. These systems may be effectively combined in a two-stage unit, such as the ESC-Series, to add additional cooling as the result of the two processes working together. 

Providing comfortable and healthy working environments

The benefits of evaporative cooling extend well-beyond temperature, especially in terms of improved indoor air quality and its effect on your employee’s health and morale. For example, rather than recycling existing and contaminated air in the building,  the 100% outside air brought in by the evaporative cooling system achieves fresher, cleaner air for the workers inside the facility.

The investment of thermal comfort does more than meet a code standard, it signals to your employees that their leadership team cares for them. It increases employee morale and allows them to continue to work at their full capacities, increasing productivity and lowering turnover rate. You probably wouldn’t want to come to work in a 90-degree building on a hot summer day, so why expect your employees to?

4 Tips for Increasing Unit Efficiency 

Have an evaporative system installed? Let’s make sure you are running optimally.

  1. Perform maintenance on your evaporative cooler routinely. Clean the cooling pads, filters, reservoir, and pump at least once a month during the summer months. Maintaining your system will ensure it is operating at peak performance. 
  2. Evaporative coolers rely on temperature differences between the outside air and the wetted evaporative media. Run it during the warmest time of day to get the most out of your system.
  3. Evaporative media should be damp but not wet or dry.  Periodically ensure water levels are within manufacturer recommendations. 
  4. Building ventilation process loads and temperature conditions can vary. For maximum efficiency, ensure your unit is set to meet minimum ventilation requirements while monitoring building humidity levels so as to provide maximum temperature depression without over saturating the space with moisture. 

Come see for yourself

Cambridge Air Solutions Tours are available to answer any questions you may have about cooling your facility. Schedule a tour today to see our own evaporative cooling unit in action at our manufacturing facility and see how it provides cooler air to our facility in the St. Louis summers.

A safe and healthy work environment benefits everyone committed to success. 

The ESC-Series evaporative cooling unit is a semi-custom fabricated air handler that can utilize direct (DEC), indirect (IEC) evaporative cooling, or a combination of both indirect/direct (2-Stage) evaporative cooling to meet specific usage and dimensional requirements. Heating options are also available. The evaporative cooling unit uses 100% outside air to provide tempered make-up air and building cooling. The ESC-Series unit is designed for industrial, commercial, and institutional buildings needing better indoor air quality without the equipment or operating costs associated with mechanical cooling.

Providing a safe and healthy environment for employees continues to be a priority for manufacturing leaders, especially in facilities where manufacturing conditions create a potentially harmful environment for those working inside. Many manufacturing and industrial facilities that are plagued with poor indoor air quality typically do not have adequate ventilation. This lack of proper fresh air can create a variety of poor conditions such as high concentrations of harmful contaminants, hazy indoor conditions, improper process or product quality, OSHA safety violations, or even severe employee illness.

The first step in solving your Indoor Air Quality issues for your manufacturing environment is a properly sized mechanical exhaust system, preferably located nearest to the source of indoor contaminants. The rate of exhaust airflow or amount of fans may vary due to the process or the type of contaminant. As the exhaust fans capture, contain, and expel these harmful gases, fresh air is drawn into the building and into the occupied space thus lowering the concentration of harmful elements.

A proper ventilation strategy must not stop here – as many manufacturing environments needs and processes change, they fail to add the necessary tempered make-up air units, resulting in poor temperature control, negative building pressure, uncomfortable cold spots, and sometimes poor product quality.

In these situations, a right-sized make-up air solution can bring in the clean air that is direly needed. This type of system not only improves the quality of air within the building to meet ASHRAE and local standards, but also protects the health of the employees.

Cambridge M-Series 100% direct-fired units are the most efficient way to offset building exhaust and improve Indoor Air Quality by introducing fresh clean air from outside.  Our Make-Up Air units are designed with reliability and energy savings in mind, along with low costs for installation and maintenance. M-Series heaters include patented Cambridge Low-Fire Start Technology and proprietary stainless steel burners are specifically designed to provide year-round ventilation and tempered make-up air for a wide variety of commercial and industrial facilities.

With CFM ranges from 1800 – 75,000 available and the ability to customize the system to your facility, these units are utilized across the United States in applications from tire factories to paint booths to food processing plants.

Do you feel like your facility is working against you? When the air in your facility is too hot in the summer, too cold in the winter, or too contaminated from your manufacturing process, you can turn to Cambridge Air Solutions for support and guidance. Join us for an Air Solutions tour customized to address your specific questions regarding how our technology can help you address your facility challenges. Your knowledgeable Cambridge guide will walk you and your team through our facility and answer any specific questions you may have regarding HTHV, Makeup Air, or Evaporative Cooling technology.

Video recap from our livestreamed Grand Opening from Tuesday, June 29th, 2021.

This 20 minute tour will be a quick glimpse into a lean workstation as well as a high-level look at what a people-centric culture is all about. We touch on continuous improvement (lean) and a close-up to what expansion during a pandemic looks like. We also showcase our M-Series Make-up air product line that brings in the fresh, tempered air into warehouses, factories and distribution centers all over the county.

Have questions about your specific facility and how to provide ventilation? Ask us anything.
We can arrange for a 45 minute virtual or in-person deeper dive of our technology.Your knowledgeable Cambridge guide will walk you and your team through our facility and answer any specific questions you may have regarding HTHV, Makeup Air, or Evaporative Cooling technology.

Since this tour is customized to specifically to address your facility’s challenges, we ask that you complete the online form below. When you hit the ‘SUBMIT’ button, it will go to our Sales Development Representative for review. The SDR will reach out to you to setup a mutually agreeable time for everyone to meet either in person or online. We encourage you to include everyone on your team who may be involved in the decision to improve the environment of your facility.

Sign up for a 1:1 tour here.

This blog was guest written by Matt Lanham, Regional Sales Manager at Cambridge Air Solutions.

What it Means to "Do Nothing" as a Leader
I’m supposing a few of you are picturing your toes in the sand, a good book, the feel of a gentle breeze and the rush of the tide crashing on the sand.  Maybe a comfy couch, a Saturday afternoon nap with absolutely nothing on your agenda. Sounds good, doesn’t it?

In the facilities management world, doing nothing can take on a different meaning. “Doing nothing” means meeting status quo - nothing more - and it can have a dramatic effect on everything from comfortable workspaces to employee health to retaining the best talent available for the job. When faced with the decision to invest in your facility, it can be tempting to put it off or assume that your current system is performing “OK” and there is no immediate need for action. But now that facility leaders are challenged with creating better cultures and healthier working environments inside their production spaces, the cost of doing nothing is now greater than ever in regards to your employee’s health, productivity and job satisfaction.

Focus on the Ventilation
One of our governing bodies, the American Society for Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), set forth standards to provide necessary minimum ventilation for occupied working spaces. This limit is always being pushed as healthier buildings demand less recirculated and more outside air for worker safety.  With proper filtration and the right amount of exhausted air, workers can experience better cross-flow ventilation, removing a ton of contaminants that can cause health and safety problems.

But indoor air quality (IAQ) is only a small part of a much larger picture. Leading an efficient workforce while maintaining a high level of quality in the end product is paramount to a company’s future. Greater than 85% of all manufacturing in the US comes from small businesses and what the larger big-box warehouse and manufacturers can attest to, worker comfort is a priority for their long-term growth, recruiting and retaining top-notch talent and for the overall safety of people.

Summer Temperatures
As warmer temperatures take hold of a majority of the United States, processes inside of manufacturing spaces cause internal temperatures to rise even faster,  largely due to the processes going on the production floor. While many facilities utilize a combination of intake and exhaust fans, this is just a first step in battling heat stress.  Several recent studies indicate that there is a direct correlation between rising temperatures and productivity levels – so much that there is a 1:1 correlation between temperatures above 77˚F and worker output.  Not to mention at higher temps employees are more likely to have accidents and produce products of a lesser quality. By doing nothing at all, facility leaders are already spending several thousands of dollars daily, weekly or annually in lost productivity and down time. 

Can You Air Condition a Warehouse or a Factory?
Inside our homes, there is great success in using vapor compression/direct expansion (DX) cooling with recirculated air, but with huge heat gains from processes inside manufacturing spaces, DX cooling isn’t adequate enough nor does it provide enough outside air to satisfy minimum occupancy requirements. Moreover, the cost to run DX cooling is some of the highest in the HVAC industry. Some plants consider using chilled water systems, but typically require a large capital investment up front to install chiller plants, pumps and other equipment.

Nature’s way of cooling
For centuries, manufacturing spaces have utilized evaporative cooling to provide temperature depression inside their spaces. They know that because of a very simple design, there are less moving parts and MUCH less energy required to run them. While typically thought as a viable alternative in drier climates, the use of 2-stage evaporative cooling (including an indirect heat exchanger coupled with direct evaporative module), is gaining a lot of traction in climates of the Midwest, Mid-South and Southeast United States. These facility owners know that their customers demand a high quality product, their workers rely on healthier working environments to be productive and they can provide temperature relief without spending a fortune operating their systems.

Come and See for Yourself
At Cambridge Air Solutions, we not only manufacture equipment to help create healthier working environments, but we’ve experienced some of these same challenges – internal heat stress, worker comfort and unhealthy indoor temperatures.  Come connect with us either virtually or in person to see how we have tackled some of these issues, installing a large Two-Stage evaporative unit on our building to help offset internal heat stress while lowering our indoor temperatures to help maintain a healthy work force.

This blog is guest written by Matt Lanham, Regional Sales Manager at Cambridge Air Solutions.

The horsepower paradigm

Watching from the pits of a National Hot Rod Association (NHRA) event, while a team of mechanics ushered a top fuel dragster into their tent, broke the engine down, retooled and quickly rebuilt 6000 horsepower in front of me. These guys know how to harness an extreme amount of power necessary to propel a driver ¼ mile in less than 4 seconds. While I observed the bevy of activity taking place like a well-choreographed production, a team of technicians huddled around a computer display, making minute adjustments to the engine; trying to tweak out every last drop of power necessary to win the next race.

What are these technicians most concerned about? Atmospheric conditions and its direct effect on the generation of the most power they can achieve – all for one 3.6 second race.

A basis of design
I am often asked to substantiate our talking points regarding the true power of our S-Series space heater. Utilized in warehouse and manufacturing environments, these units pack a ton of horsepower to offset heat losses caused by infiltration, open dock doors and skin losses inside buildings. Small in stature, we offer units ranging from 250,000 BTU all the way up to 3,200,000 BTU. Being the only unit available that can achieve 160F discharge and temperature rise does raise some eyebrows. Other manufacturers have claimed to be “like Cambridge”, but the simple fact of the design of the unit offering a blow-thru arrangement, it has inherent advantages over every other heating unit in the market.

More efficient design due to atmospheric gains
Bringing in 100% outside air and introducing it to our blower FIRST before raising the temperature is the basis of the S-series unit. Due to this, we often show our engineering community the effect of our fans processing an air mass that is higher in density – thus containing more oxygen; a vital component in clean combustion.  Without diving into the laws of thermodynamics, fans that process cooler, denser air help produce higher BTU outputs than units that pull air thru a burner – where they are processing warmer, less dense air. Cambridge is the only manufacturer to build its own burner - a fully stainless steel unit - while keeping the mechanical components out of the hot air stream leading to a longer life-cycle of the components.

Healthier buildings using 100% outside air
Indoor air quality is a hot topic lately, largely due to end-users wanting healthier working environments for their most precious asset - their people. Business continuation is dependent on having a consistent and healthy work force and recirculated air inside of spaces isn’t healthy. To offset unhealthy indoor contaminants that build up in spaces that use recirculated air, proper use of HVAC units bringing in 100% outside air is paramount. Recirculation units also offer a lower temperature rise, and need to run for much longer periods of time to offset heat and pressure losses inside of spaces. This is wasted energy.

High performance support
There’s no questioning the 400+ building and case studies we’ve performed in a variety of markets with solid data to support worker comfort, more even temperatures and gas and electrical savings over other technologies out there.  Our contractors have come to love the fact that we make our S-series units the most complete heating and ventilation package there is in the market – taking a lot of the guesswork out of their day searching for missing pieces or parts they thought they were getting. Our support team of engineers, technical trainers and technical advisers are there to help our contractor and engineer community with on-site or virtual training, developing the next solution or running a heat load with layout; giving our customers the confidence they need, knowing the factory is backing them up.

Come visit and ask us anything.
Come witness for yourself what a high performance team of individuals do every day at Cambridge Air Solutions. Come see us virtually for exposure to our Lean journey or a product tour. Come feel that same heart-pumping charge we get seeing our folks improve everything they do – every day.