Techical Corner: The Science of Loafing Time

Life presents all of us with choices and decisions. When it comes to work responsibilities, machines have been increasingly valuable, giving us more time to accomplish other tasks. In addition to machines, our own ingenuity allows us to modify even our procedures to lessen work and time.

Human ingenuity has provided us with many devices that take away burdensome tasks, for example dishwashers or self-lubricating equipment or “automatic” temperature controls and so on. There is no question that such devices improve our quality of life, freeing us up to accomplishing other tasks or alternately just giving us “loafing” time where we can relax.

There are many jobs that are necessary but we don’t particularly care to do, like washing dishes or cleaning air conditioning coils often are put off until the last minute. Some of us might even like to put up a curtain to cover dirty dishes so we don’t have to look at them until we run out of dishes.

It is easier to put off cleaning with coil cleaning because the coils are already inside an area that we can not see anyway. No curtain is required here!

Tales of wasted energy efficiency from dirty coils and bacteria/fungus buildup (which are true by the way) do not seem to entice the average guy to clean coils more frequently. In this case the out-of-sight and out-of-mind concept applies.

Adding to the reluctance of cleaning coils in general is the rather significant fact that almost all facilities do not have the manpower to do it. So that pretty well seals the deal of only cleaning coils when the pressure drop is so high the air flow has dropped by 30% or even more.

While no one has yet to develop an in-place automatic machine to clean coils at the push of a button, human ingenuity has provided a solution.

It is more than just “nice” thing to do than cleaning coils – the benefits are there, and are proven accurate. Less back pressure on the fan system, less restrictions by fungus or mold and bacteria on the coils make significant differences in not only energy consumption, but air quality from the odors that dead and decaying microorganisms emit. Topping those factors off, wouldn’t it be just great to look inside of the HVAC air handler unit and see a glistening interior free from odors, free of any drain pan deposits along with crystal-clear water? And most importantly, with no extra work on your part?

A dream you say? No, it is simple and economical to have this now.

At CRT, our emphasis over the past 25 years has been in developing advanced products that keep air handlers looking nice where it counts – in the interior.

The development in our in-house R&D lab of these products using the latest technology we develop and manufacture in-house insures that any air handler using CRT solutions will be and continue to be clean. Benefits of increased efficiency, freedom for microbial odors, unexpected overflows and overall cleanliness are real. It has been said you could set up your office inside the air handler it is so clean. Can you say you could do that now with your existing air handler?

Whether you can or not, it will benefit you to look at the many unique products we have created at our website http://www.cleanac.com. Or, for extending the life of your air handler, check out http://www.pancrete.com to see how this simple to use product can give you more than you expected for your HVAC air handler.

lynnLynn Burkhart is the founder and president of Controlled Release Technologies, Inc. located in Shelby, North Carolina. More information about the company, and its products, can be found at http://www.cleanac.com and by calling (800) 766-9057.

Technical Corner: Where Does the Money Go?

lynnAt times there seems to be a gap between maintenance engineering departments and finance budgeting. While in some cases this is understandable, there are areas that are of vital financial interest to both the building owners, and to those who pay the bills. One major shared interest is HVAC systems.

There is no question that the heating and cooling systems of buildings are a necessary, albeit expensive, item to purchase and install. Most would like to maintain this investment, and to prevent a premature re-investment in replacement equipment. In larger buildings, such a re-investment could easily cost a million or more dollars.

Outside of sustaining the equipment to avoid very expensive replacement, the operating cost of the equipment also involves serious money. According to the engineering society ASHRAE, 50% or more of a buildings’ monthly energy costs originates directly from the HVAC system.

But given all this, are the best maintenance practices being kept regarding HVAC equipment?

Of course, purchasing more efficient equipment markedly helps lower monthly electrical bills, but ASHRAE’s studies show that dirty or fouled cooling coils increase energy costs by 20% or more. Letting coils become dirty and fouled only serves to throw money down the drain, however few buildings pay attention or provide a budget to keep coils clean. Additionally, this puts more stress on the unit, causing it to work harder, and live shorter.

Replacement can be preventable through proper, and not necessarily expensive, maintenance. With that in mind, we here at CRT have built our reputation, providing solutions that directly affect and eliminate the need for air handler replacement.

We can offer economical and effective solutions to put more money into a user’s pocket by cutting operating costs of the HVAC system, while at the same time insuring that air handling equipment will not have to be replaced for a long time. For more information on these solutions, contact our customer service department at 800-766-9057, or visit us on the web at http://www.cleanac.com.

Lynn Burkhart is the founder and president of Controlled Release Technologies, Inc. located in Shelby, North Carolina. More information about the company, and its products, can be found at http://www.cleanac.com and by calling (800) 766-9057.

Technical Corner: Putting more Money into Your Pocket

These days balancing one’s finances is an ongoing job. There are “hidden” expenses we all have that follow the “Out of Sight, Out of Mind” rule.

A major one for buildings is power loss – up to 20% of what gets spent for energy is literally wasted. Why?

All occupied buildings today have heat, ventilating, and air conditioning. Most, if not all, have maintenance. Techniques used by service workers are not well known, and if you are like me, there are many things one does not necessarily want to know. In general, it appears best to out source the job of maintenance, or have a designated person on the maintenance staff to do the work.

It has been shown by ASHRAE, and is intuitive, that dirty cooling and heating coils dramatically influence how effective the HVAC system is in heating or cooling. In fact, there can be a 20% loss of efficiency with fouled coils. Since the HVAC system accounts for 50% of a buildings energy consumption, at least 10% of the monthly power bill can be avoided.

This amounts to several thousands of dollars per year in most buildings.

Research and development at CRT has addressed this important issue to reduce both financial expenditures and service work. Get in touch with us – more information is just a phone call or email away.

Technical Corner: Tips for Cleaning Dirty Air Conditioner Coils

It is difficult to clean HVAC coils effectively due in part to coil design.  For multiple row coils, the copper tubing is staggered, and this prevents a stream of water from entering into the coils too deeply.  Usually the water velocity penetrates only the first few inches of a coil to loosen deposits.

Fouled coils lead to increased pressure drop across the coils. When pressure drop increases, more fan horsepower is required. This in turn draws more power, resulting in greater current consumption.

Pressure drop measurements across the coil when it is new are a valuable base line for performance.  Differential pressure that increases by more than one and a half to two times for sure indicates problems with coil cleanliness.

Cleaning coils also plays an important part in air quality.

Here are some rules to follow in cleaning coils:

1)Hot water always works better than cold water when it comes to cleaning.

2)Foaming cleaners, such as our product Instant Powder Keg, are generally better than non-foaming cleaners to remove biofilm and other deposits.

3)Certain areas of the coil may have more deposition than other areas.  A gentle flush of water through the coil may identify areas that are particularly fouled.

4)Cleaning from the bottom of the coil to the top is recommended. Multiple cleanings of the coil may be necessary due to heavy deposition.

5)After completion of cleaning, again run the hose through the coil to see if water now flows freely through areas previously found to be restricted.

6)Coil cleaners may be either acid, neutral, or alkaline in nature.  Many manufacturers call neutral pH or alkaline pH cleaners “non-acid” cleaners. Both acid and alkaline cleaners will attack coil fins, causing pitting and other corrosion. To reduce this problem, coils must be copiously rinsed with water to neutralize any chemical residual left on them.

7)Sanitize the coils using an iodine-based anti-microbial.

8)Apply a molecular coating to the coils, such as our product First Strike Micro Coat, to reduce future build up.

Properly cleaning coils as part of a preventative HVAC maintenance program can save a building owner thousands of dollars.

Lynn Burkhart is the founder and president of Controlled Release Technologies, Inc. located in Shelby, North Carolina. More information about the company, and its products, can be found at http://www.cleanac.com and by calling (800) 766-9057.

Technical Corner: Indoor Environment Connections

Recently I was asked to write an article about HVAC System Hygiene for the March issue of Indoor Environment Connections. In this article I discussed four specific, and frustrating situations I have come across during my 25+ years in the industry. These include outsourcing by a major Southeast resort, coil cleaning at a hotel, inspecting an air handler serving a pediatric ward, and ignoring obvious problems at a separate major hospital. To read these field cases, please visit or download http://www.ieconnections.com/pdfs/newsletter/2012/IEC-03-2012.pdf and scroll to page 24.

As always, I welcome your comments below.

Lynn Burkhart is the founder and president of Controlled Release Technologies, Inc. located in Shelby, North Carolina. More information about the company, and its products, can be found at http://www.cleanac.com and by calling (800) 766-9057.


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