Air Duct Cleaning

Multiple times a day, the air in your home is circulated through the HVAC heating and cooling system installed, carrying along with it copious amounts of visible, as well as invisible, air-borne dust and debris.

Over time, aided and abetted by neglect and poor installation work, a part of this everyday dust and other contaminants that managed to sneak past the furnace filters, gets accumulated in the ducts, and reduces the efficiency of your system.

Effects of grimy ducts

Although it has not been scientifically proven yet that a build-up of grime in your ventilation duct system poses health hazards as such, experts recommend cleaning up your air ducts once every three to five years. You might usually want to hire a professional HVAC repair and maintenance company do the cleaning services, which they usually charge at around $300 to $500 for a full clean-up.

Lately, builders have increasingly focused on insulation and energy conservation. As a result, air duct system if kept without maintenance for long stretches of time can become stale and mold-infested, which can be mildly discomforting, especially if the inhabitants are prone to allergic reactions from debris floating in the air. Thus for those with sensitive adenoidal functions, investing a couple hundred bucks in a duct-cleaning project shouldn’t be much of an annoyance.

Do it yourself

Before you pick up your phone, there are some easy tips for an elementary duct-cleaning exercise.  Simply detach the floor register or the furnace filter, insert a vacuum cleaner hose into the duct, and vroom it around for a bit. When you’re done, if you can still spot coats of dust and grime beyond the reach of your cleaning hose, it’d be advisable to call in the pros.

Symptoms of an unclean duct

Once in a while, after a period of heavy and constant temperature moderation, especially after the warm and cold months, all duct entrances should be examined to ascertain the level of contamination inside. The following symptoms are indicative of significant indoor pollution:-

  • Visible particulates blowing out of your surface filters and registers.
  • Clogged dust and grime, entangled with hair and cobwebs.
  • Rodent/Insect droppings/corpses.
  • Mold.In addition, experts say any recent re-modelling or nearby construction activities are sure to contribute unwanted dust into your ventilation system.

Thus we have seen the various scenarios which might warrant a call to your nearest maintenance guy.

Reasons to skip

One might also seek to consider the possible scenarios in which the clean up process is simply un-necessary, and also in order to save those valuable 300-odd bucks.

  • No verifiable or proven health benefits.
  • Grime already accumulated and settled in your duct system is probably not circulating in the air.
  • Cleaning or changing the surface filters regularly usually does the job, as they trap all the visible culprits anyway.

Methods of duct cleaning

  • Portable hand held vacuuming
  • Mechanical brushing
  • Air sweeping, the most effective, as well as costly, process.

Getting the air ducts cleaned once every couple of years does a decent job of maintaining your domestic air purity. Certain agencies insist on annual air-duct cleaning jobs, citing unverifiable health hazard claims, but it is probably going a bit overboard.

Exercising a certain flair of prudence and domestic caution can go a long way in keeping your ducts clean, and the air in your home dust-free. Sometimes it’s best to simply hire a professional company to do, and I would like to take this time to recommend chauffage montreal by Climatisation Davis, an air conditioning company in Montreal.

Concept Of The échographie

My name is Professor Blackwell, and I am writing on behalf of this blog on the subject matter of the ultrasound or échographie as my French Canadian colleague and friends like to say.

In 1949 Department of Defense news release – perhaps the earliest document mention of the research into the use of the ultrasound for medical imaging of the human body was by Dr. George D. Ludwig whose daughter, Rosemary Ludwig Turner, provided this information to the ultrasound education in October 2005.

So the very first publication about medical ultrasound might qualify as a “point of care” ultrasound application (the identification of no-radio-opaque foreign bodies such as wood or glass embedded in the human body), not exactly field portable… however when I first started doing ultrasound in 1974, the image above was representative of a state-of-the-art ultrasound examination. This was midline echoencephalography, a technique for screening emergency room trauma patients for the intracranial hemorrhage (long before the common availability of the Computer Tomography) a very early point of care for the ultrasound.

The échographie has come a long way in the length of time I’ve been fortunate enough to be involved with it.


Here is a quick look of an ultrasound of early pregnancy as seen in the picture above. The green arrow is pointing to the fetus. This display is black and white. There are absolutely no shades of grey. So it’s what was called as “by stable”, it was either on or off and it. Now if we can compare that to what we can do now as displayed in the other image below, in the before and after image. Now we can view an ultrasound in 3D we can look around, rotate in any direction, all the soft tissue, bones, and a lot more information. So it is quite remarkable, how far we as a society have come in a relatively short period of time.


This is a representative of a current high quality scan ultrasound as seen in the picture below. This one is a trans-vaginal ultrasound scan of an early pregnancy. You can see a lot of details, and information such as the embryo, etc. The entire heart of a developing fetus is about the size of a nickel after roughly about 20 weeks.

So the concept of the échographie/ultrasound really started in 1949.

TMJ dentistry Tools

I grew up here in Ottawa, so most of my friends are from here as well, and not long ago, a few of them have been asking me which dentist in Ottawa uses tools for aligning the jaw as far as TMJ dentistry was concerned. So in this article, I am going to list 4 highly advanced tools Ottawa dentist Dr Hoa Nguyen uses, and why each is very effective.

Electromyography: the electrical activity of the muscles and the skull to jaw relationship can be measured by this method. It also determines the tension of muscles in a relaxed position as well as during jaw motion.

Sonography: the sound of the jaw during its movement is recorded by sonography. The grinding, popping, clicking and irregular bite sounds are all recorded.

Computerized mandibular scan: it helps in precisely scanning the jaw position when in motion and at rest.

A neuromuscular dentist in case of TMJ disorder treatment uses transcutaneous electrical neuromuscular stimulation (TENS) method. It is a method of massaging and relaxing the muscles from spasm and therefore relieves from pain.

Role of neuromuscular dentistry in smile makeover: smile makeover generally involves all the aspects of smile which includes the teeth and gums. It is also necessary to give the proper jaw alignment. A neuromuscular dentist takes care of the fact that not only your smile makeover is successful with just the dental aspects but also but it functionally and cosmetically stable. He makes sure that the muscles relax and the TMJ functions properly.

Role of neuromuscular dentistry in dentures: a traditional dentist completely depends on the impressions of the jaw so as to make a denture for the patient. On the other hand, a neuromuscular dentist’s treatment slightly differs as he involves the muscles of the jaw during treatment. Therefore, the dentist eliminates almost all the commonly associated problems with denture such as chewing and speaking.

Hopefully this article helps you answer some of your questions.

How to Invest Wisely

Investing starts from the first penny that you earn. Most people are enticed by the allure that money brings with it; power, freedom and the ease with which to attain some form of happiness. Yet, the habits and attitudes of most of these aspiring investors is one that is inversely proportional to success.

One problem most people have is holding on to their savings; most of us are broke even before the month is over, needing us to be enslaved by the pursuit of more money which is once more unwisely managed; and so the circle begins again. What is remarkably different about successful people, and those that just can’t seem to have that foot outside the door, is that; the wealthy pay themselves first and then others after. By this I mean, one has to save, at the very least, ten percent of the income they earn, even when greatly indebted to others.

What happens when these savings after twenty four months of compounding? You have more than 2.4 times the amount of what you’d expect to earn as income for one month’s work and pay; this already is the foundation of the source of your investment capital. Now the real work begins.

“Don’t place all your eggs in one basket”. After much research has been done on behalf of the investor, diligently insuring that all the pros and cons to the endeavors they wish to invest their hard earned money are well considered, weighed, and once more; further pondered upon. In the initial stage, you will of course be limited to two or three investment plans at a time. Seek not therefore to invest your hard earned money into what you’re unsure or uncertain of, or of which you have made no attempts to fully grasp the means of operation and the history of that business or organization.

I personally shy away from investing in stocks or bonds, which need a better grasp of geo-political situations, and statistical data of historical events, and data for the present and even prospects for the future; and where said situations and events are most likely to lead to for the business or enterprise of interest to the investor. It’s not for nothing that stock traders and the like are highly paid and highly skilled at picking up on the discrepancies in real time, as fluctuations, now more than ever in history, rise and fall almost unpredictably.

One then is better advised to not only invest their money in much more sound opportunities which have a steady expected increase; especially favor ones that permit you to devote not only your money but your time as well into the partnership. Time and money are often interchangeable currencies; the lack of one can be counterbalanced and set straight with the presence of the other.

Sometimes it is better to spend six months toiling and insuring that your partners and you maximize each others’ skilled potentials. It is not for nothing that most say that: time is money. And so better to do things correctly and on your own, than to entrust what could end up being a fortune for you into the hands of a complete stranger, whose loyalty to your cause is only as far reaching as the height of the pile of money you compensate him with. Moral of the story: eliminate as much doubt and uncertainty by investing not only your time and money in the initial research phase of your undertakings, but also still more of the same amount of time and money throughout the growing process, seeing to it that your investment grows to a sustainable enough level to not need your guidance; like a child that’s finally got their head on their shoulders and is now able to not only survive but thrive even in the absence of their guardian; you.