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.

Cambridge High Temperature Heating & Ventilation (HTHV) Space Heating Systems are designed to meet a building's heat and air load requirements and be energy efficient. 

Discharge air from the S-Series HTHV Heater creates a large volume of fresh, warm air flowing throughout the building which eliminates higher ceiling temperatures and uncomfortable drafts. The S-Series Heater utilizes 100% fresh air to dilute contaminants generated within the building. This virtually eliminates air quality problems associated with infrared heaters or conventional air heating systems that recirculate indoor air.

The video below highlights the technology behind our S-Series heater or you can click here for more product information.

This tech blog was written by our engineer Bill Meyer, of the Cambridge Air Solutions Applications Engineering team.

“Spec” buildings… You gotta love ‘em.

We, at Cambridge are frequently involved with heating “spec” buildings. You know how it goes: a developer puts up the shell, pours the concrete slab, heats the building to a minimum temperature the closes it up with no plans for ventilation. At some point in the future, the developer signs up a tenant and proceeds with the tenant fit-out. That is where our story begins.

The 200,000 sq. ft., 32’ high, uninsulated tilt wall building in Kansas City was erected in 2017 but was not occupied until 2019. In February 2020 our Regional Sales Manager learned from the Property Manager that the tenant was experiencing problems: condensation on the walls and the heaters were not maintaining the desired 55°F space temperature (although the design temperature was 50°F). A Cambridge Applications Engineer was asked to follow up to see if there was anything we could do to help.

Cambridge had participated in a “Building Burp Test” for a similar building in Allentown, PA. The test consisted of running the heating system continuously for 48 hours. The heaters were turned off, the building was ventilated with 1.5 air changes for one hour, and the heaters were turned back on. The indoor moisture level was reduced by 18%, based on datalogger results.

The tenant immediately implemented a similar plan to that outlined in the “Burp Test.” The process helped to dry out the building, but the heaters were still not operating as they should. The next step was to have a Cambridge’s Service Technician visit the job. He was able to get the four Cambridge heaters operating properly by replacing faulty discharge temperature sensors and setting the discharge temperatures to 160°F. The tenant was then able to maintain the desired 55°F space temperature.

Our experience is that providing ventilation significantly reduces moisture problems when buildings are closed up and the concrete slab is curing.
 

THRU WALL UNITS 

Thru wall units are an excellent choice for many warehouse applications. They do not require any floor space. Typically, the units are mounted in shipping/receiving areas to address the cold air gain at the dock doors. 

For manufacturing areas, due to the presence of overhead cranes, thru wall units are frequently not a viable option. The clearance required for an overhead crane at the side wall typically does not allow adequate room to install a thru wall unit. 

The heater may have an external gas train. The gas train should be positioned such that the equivalent distance from the outlet of the gas train to the inlet of the heater does not exceed 4 feet. Usually the best location is to place the gas train perpendicular to the side of the heater, so it can be piped directly into the heater’s gas inlet, as illustrated in the S-Series Technical Manual. 

Servicing the unit is another potential problem if overhead cranes are present. Accessing the unit via a boom lift or scissors lift will entail entering crane space. This usually means that the work cannot take place until the crane(s) is locked out or other measures (such as a blocking crane) are taken. Locking out of cranes may seriously affect production, so it should not be taken lightly. 

Servicing the units utilizing a ladder is frequently not an option due to requirements for safe ladder use. In addition, it is difficult, if not impossible, to access several of the heater’s parts from a ladder. 

If a location for a thru wall unit is found, then consideration should be given to the impact on local work stations. What will the mounting height of the heater be? How will the air be distributed? Double deflection grilles are extremely effective when fine tuning air flow. 

Another potential safety issue is whether plant personnel will be regularly traveling or working beneath the suspended load. Additional safeguards may be needed to secure the heater. 

Installing the unit may require barricading the floor area where the installing crew is working. Plant vehicle & pedestrian control must be considered. Flag men may be required. These aspects will need to be covered in the safe work plan. 

Below are installations of thru wall units that were installed several years ago. As always with retrofit installations, final mounting configuration and placement depends on “what the building gives you” with which to work. 


The Cambridge Air Solutions' Applications Engineering Team is available to discuss custom solutions for your project. Have your local rep engage this team for any specific needs you have!