A Little About Heating and Air Conditioning

A cold blast of air on a hot day can be one of the most comforting feelings there is.

Air conditioning is often used to offset external temperatures to make conditions indoors are more habitable. It may be used in commercial buildings, residential houses, and even sports arenas. In Canada and the USA, plenty of homes have air conditioning which accounts for almost half of the homes’ energy consumption. HVAC (heating, ventilation, and air conditioning) faculties are a requirement in almost all commercial and residential buildings today.

refrigeratorHow it got started

Air conditioning has been around ever since the first refrigerators were invented. Scientists have become more innovative with mechanical and electrical cooling. Since then, air conditioning applications have spread to even more domestic and industrial uses.


In residential properties, there may be a central air conditioning system which regulates the temperature and humidity from a central location. You may also have separate air conditioning units. These are used to cool special rooms and not others. Regardless of the air conditioning system, proper maintenance and care are vital. These HVAC components make up a system for total comfort in the home. A heat pump has some added features that provide a degree of heating in winter. The efficiency of the heat pump, however, is usually decreased as the outdoor temperature drops.

Service & Repair

A qualified technician with substantial experience is advised whenever the system needs to be fixed. There are many, “do it yourself” advocates, but it is often not air-conditioning-furnaceworth the risk. Correct installation and maintenance by a professional reduces costs and increases lifespan. Repair could include replacement of individual parts or the whole depending on what the technician advises.

With the technological advancements of modern times, prices of air conditioners have reduced. This has made them more affordable and accessible for many individuals and families. Prices vary according to the type of system or device. There are window conditioners, through the wall air conditioners and portable air conditioners. The size of the air conditioner could also come into play when it comes to prices. The efficiency or S.E.E.R. rating are other factors to consider when looking at purchasing Central Air, an H.R.V. or a new furnace.

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Power Vent High Efficiency Water Heater Review

High-Efficiency Water Heater Review

High-Efficiency eF Collection ®

BW-powervent-water-heaterThis is the Bradford White High-Efficiency eF Collection ® Electrical power Vent hot water heater. It integrates a thermal performance of over 90%. In addition, it has a high storage capacity to provide an excellent quantity of functional warm water. The power vented hot water heater utilizes inside air for combustion therefore only one vent pipe is needed. An upright, dual-pass heat exchanger gets rid of the rust, scale and corrosion issues related to condensing hot water heaters. The 5″ tube splits into 3 2″ heat transfer tubes. The self-priming condensate tee removes the requirement for an outer trap installation.

High EF TTW ®BW-powervent-water-heater

The High EF TTW ® provides an enhanced quantity of warm water readily available at a functional temperature level in much less time compared to typical standard units. This collection supplies extra insulation, leading to greater Power ratings. It’s rated for POWER CELEBRITY ® demands. Like our TTW ® 1 and also TTW ® 2 collections, these versions are electrical power ducted for favorable exhaust. They supply better installment adaptability with the capacity to duct from a wall surface of roofing system, with either 3″ or 4″ PVC, CPVC or ABS.

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Choosing the Right HVAC – Service Contractor

Finding the Right Air Conditioning Company is Important

The air conditioning unit is one of the most expensive installations in your home. It’s important that you find a qualified air conditioning repair company to do maintenance. Since there are so many HVAC companies this can be a bit hard to do. How do you know which one is best when all of them are claiming that they are?

If you want to find an air conditioning repair company that will do a good job there are certain qualities that you should be looking for:

hvac-refrigeration-contractors• The first and most important thing to consider is the technicians’ experience. You want a company that has been around for at awhile and that knows how to deal with different models of units. It’s always best if they are located in your neighborhood. They’ll most likely be cheaper and as they have a lower travel cost.

• A good HVAC company will never bill a client before they do an inspection. In order to do repairs they first have to go into the HVAC unit and determine what needs to be done. Even if you are calling them in for regular maintenance they should give you a quote after they take a look around. The invoice should be detailed showing what you are paying for parts and what you are paying for labor.

• The best HVAC companies are professional. They will dispatch a technician to your home as soon as you call them and once they arrive they will work fast to make sure that they get the job done right. Don’t call in an HVAC company at the last minute; they may charge you more because they know that you are desperate. Worse still, if it is in extreme weather they may not be able to come to you immediately.

• Check how much an air conditioning repair company charges before you hire them. There are some that are expensive because they work in high-end neighborhoods.

Tips to remember when choosing an HVAC Service Contractor

If you use these tips you should be able to find the best air conditioning repair company in your area.

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HVAC – Air Conditioning Basics

Connecting Air Conditioning manifold

The manifold set will commonly have a red high-pressure side hose, as well as a blue low-pressure side hose, and then a yellow hose in the centre. The most convenient means to consider which hose pipe goes to the correct side is by thinking of a fluid. A smaller pipe size would require a lot more pressure in order to hold the same amount of liquid as the larger side. The way I always remembered though was red for hot and blue for cold. The liquid line which is the smaller is usually warm when operating. The suction line is usually cold and where you connect the blue hose. The yellow hose or centre hose is used for charging with refrigerant and other accessories.

 Temperature level technique

This method can verify the proper refrigerant charge without actually weighing it in. Prior to starting the system, ensure that the evaporator and condenser coils are both clean. You will need either a superheat chart or graph reference to assist in the assessment. This chart will be specific to the condenser you are working on.

You may require other tools such as a sling or digital psychrometer to measure wet and dry bulb temperatures in various locations to properly determine the outcomes. A digital clamp thermometer will also be required for surface line temperature readings.

Before taking any measurements, run the equipment for at least 20 minutes. This will provide adequate time for the mixture of oils and refrigerants. It also will give the system time to remove most of the moisture from the indoor air. This excessive moisture can actually restrict air flow on the evaporator coil and give you a false assessment.

Liquid line temperature – ambient temp = approach temp



Determining Superheat will indicate how efficient the system is operating. This will generally be a range from 2 to 30 degrees Farenheight. Superheat is the amount of heat added to the gas. Proper Superheat of the refrigerants is important for the proper efficiency and operation of a cooling system. To measure superheat attach your gauges as described above. Inside take a wet bulb temperature entering the evaporator coil using the psychrometer. Likewise, take a dry bulb temperature of the air entering the condenser coil outside.

Find where these 2 lines meet on the chart and this will tell you the required superheat. Next, subtract the Liquid line temperature measured on the suction line surface, from the saturated suction line temperature on the low side (blue) gauge in the refrigerant are on the gauge face. This will give you the actual superheat. You’ll then need to either add or remove the refrigerant to adjust to the correct predetermined rate you found on the chart.



Subcooling is similar to superheat set up except you will not need to take any bulb temperature readings. Simply subtract the Saturated Liquid Line temperature from the surface liquid line temperature and this will give you the subcooling. You’ll need to adjust this according to the rated subcooling rate indicated on the rating plate of the appliance.

It’s important to achieve the proper subcooling or superheat reading for either type of system to work efficiently and properly.

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