Showing posts with label heating and cooling. Show all posts
Showing posts with label heating and cooling. Show all posts

Tuesday, 26 November 2013

Heating and Cooling Of Yesteryears

Do you wonder how people kept themselves warm or cool as the case may be in houses of yesteryears? No one can imagine themselves living in conditions with an air conditioner in summer and a furnace/heater in winter. The first thing that flashes through your mind is,How can I live inside my home when it is so hot or so cold? 

About a century ago, people were accustomed to living without heating and air conditioning units. There was no technology or the HVAC systems that we have and are taken for granted during these past few years. Electricity was also not available and yet, people lived comfortably and remained healthy. Houses were designed to keep cool in summer and warm in winter. To know about the way houses were designed and built hundreds of years ago, take a look at some of the essential features that were addressed by architects.
  • Natural resources – For those who lived centuries ago, the absence of electricity did not pose a problem for keeping warm or cool during the changing seasons. Houses were naturally insulated thanks to the structure and materials used to build them. Every home had a fireplace which was religiously lit at dusk to keep warm. The fireplace would always have sufficient amount of logs that lasted the entire night. The warmth which was derived from the fire would be absorbed by the walls made of stones or bricks, which had strong energy retention capacity to keep the warmth inside and the cold out.  
  • Structure – The structures of old houses speaks a lot about keeping the inhabitants comfortable indoors. The walls were very thick which prevented warm air from seeping out and the cold air from entering inside. Some homes had double walls for extra insulation and it was not an uncommon sight to see people building wooden walls inside and concrete walls outside. The double wall served as an excellent insulator for the home.
  • Bricks – Walls that were built by bricks were thick and very large. Another interesting fact is that bricks take a long time to heat and also a long time to cool. That’s why, during winter months when the house is warmed, bricks can retain the heat without losing it too quickly. This of course functions the other way during summer when hot air is prevented from entering inside.
  • Glass – Glasses were placed in homes all around the south side during the construction process. Sunlight enters the house from the south side so the rays would penetrate through the glass and warm the indoors. This is indirect heat energy from the radiation of the sun’s rays used to keep the house warm and cozy. Temperature inside slowly increases as the warmth of the sun’s rays moves indoors to every area. Drapes and thick curtains are also used to retain heat inside without losing it too quickly.
  • Paint – The difference with painting your home with dark colors compared to that of light colors is that dark colors absorb heat more efficiently and quickly. Light colors reflect sunlight and thus cannot retain the heat from the sun’s rays. That’s why old houses are usually painted with dark colors so that the radiation from the sun is absorbed outdoors and the dark color of the paint locks the heat in.
  • Heat retention methods – To reduce heat transfer indoors, windows play an important role. Cement filling was used to seal the gaps between the window frames to keep warm air inside and prevent cold air from seeping in. This helped in heat retention and decreased air flow between the outside and inside. Ancient History says that the Romans used advanced heat retention methods to keep warm. They used hypocausts which was an under floor heating method where floors were raised above the surface of the ground by pillars with a layer of tiles, a layer of concrete and then another layer of tiles on top. Spaces were then left between them so that smoke or hot air from the furnace would pass through these enclosed areas and then out through the roof. This ensured that there was no pollution in any interior areas of the house but only efficient heating.

Thursday, 10 October 2013

Curb Inefficient Heating and Cooling With Energy Audits

An inefficient heating and cooling system does not go unnoticed for any home as it will be uncomfortably hot during summer and cold and drafty during winter. There are also problems associated with excessive dust due to indoor air pollution, expensive energy bills, peeling paint on the walls and ice dams on the roof due to bad insulation. With hot and cold spots in various areas of your home, it definitely depicts inefficient heating and cooling systems. If you are always trying to set the right temperature on your thermostat for comfort or adjusting the air vents, then there may be improper airflow indoors.  
If you have improper airflow, it will definitely bring harm to the working life of your furnace and air conditioning systems in the long run and contribute to high energy costs. There are several areas that need to be addressed if your home has uneven heating and cooling:-
  • Sizes of the HVAC unit – Many homeowners make the mistake of buying the wrong size heating and cooling units. Bigger units for small indoor areas and smaller units for larger indoor areas end up consuming more energy. This is because bigger units consume more energy and are not required for heating and cooling small indoor areas. Smaller units consume more energy because they need to yank up more power to heat and cool larger indoor areas. This will increase your utility bills and reduce the working life of your system. A large unit will also cause fluctuations in electricity supply for your home due to over capacity. You can ask a technician to run a check on your units and replace it if it’s not of the correct size.
  • Speed motors – The motors in your unit could also be one more feature that contributes to improper heating or cooling. For better control of indoor airflow, check to see if it’s a variable speed motor. This kind of motor moves the air slowly through the system and provides even heating and cooling. Variable motors also aid in air filtration and moisture control for optimum working efficiency of the system
  • Ductwork – Improperly sized ducts causes constriction in the air flow which provides imbalance in heating and cooling. Leakages and blocks in the ducts will also cause uneven conditioning of air. If your ducts are not of the proper size, they need to be replaced at the earliest. For proper airflow, blocks and leaks also need to be removed. You can get a professional HVAC contractor to fix all of the technical glitches in your heating and cooling systems. Only a professional can find out the underlying causes of the problem and take the necessary steps to rectify it.  

The advantages of an energy audit

To go one more step further for energy efficiency, undertake an energy audit of your entire home. Homeowners can determine where the home loses its energy efficiency and where maximum consumption takes place that causes expensive utility bills. An energy auditor is the right person to detect problem areas indoors and find a solution for it. Only a professional audit will help in determining the amount of energy that is used and evaluate techniques and processes to improve efficiency. State of the art equipments are used by energy auditors to carry out the inspection. Leaks in the building are measured by blower doors and missing insulation in hard to reveal areas like basements, attics and crawlspaces are detected by infrared cameras.
One of the biggest advantages of performing an energy audit is that it pushes homeowners into doing stuff they know they should have done long before.

Monday, 12 August 2013

Why Heating and Cooling Play a Big Role in Your Energy Cost?

When it comes to heating and cooling our homes and commercial buildings, the simple choices we make everyday can go a long way in helping us protect the environment around the year by cutting costs and managing energy usage efficiently. According to studies, energy is mostly consumed by heating and cooling. In a typical American home, around 56% of energy is used for heating and cooling, which makes it the largest expense. That is why good energy saving habits will help you save precious fossil fuels for the next generation and a good deal of money. To illustrate better, many of us leave the hot water running while shaving. A lot of energy and resources get wasted because you have used a lot of hot water just to rinse out the razor several times. Always make smart decisions when using your air conditioning/heating systems and your home’s other appliances as they contribute to the positive or negative effect in energy bills and your comfort. Increase the working efficiency of your heating and cooling systems by taking these necessary steps.

Run household appliances at off-peak hours

There are special timings during the day when electricity rates are at the lowest. So you can take advantage of that to use household appliances like your clothes washer, dryer and dish washer. This could be at off-peak hours like early in the morning, late evenings or during weekends for lower energy prices. You can also try washing clothes in cold water and air drying them to save on energy costs.

Tune up your HVAC equipment regularly

If you own a car, you will definitely consider tuning it up with regular maintenance and repairs to keep it in top working condition. In the same way, you HVAC equipment needs regular service checks and maintenance to improve its working efficiency and comfort. It can also prevent unwanted costs and future problems. Get in touch with a qualified contractor to undertake annual pre-season service checks to keep your heating and cooling systems at its peak performance levels. Contractors usually get busy during summer and winter, so it’s best to get your systems checked during spring for the hot months and during fall for the cold months. 

Seal your ducts

Forced heating and cooling systems usually have conditioned air flowing to and from your home’s ducts. Improperly sealed ducts are energy wasters as a lot of air is not used for heating and cooling each room in the house properly. Insulating and sealing ducts can improve your home’s energy efficiency by 20% and sometimes even more.  Focus on areas that need more sealing like your crawlspaces, attic, garage and basement. You can wrap them in insulation after sealing them to prevent them from getting too hot in the summer or too cold in the winter. 

Reduce energy usage with a programmable thermostat

You can automate your heating and cooling functions with a programmable thermostat. This helps you save big in energy especially when no one is at home during the day or while everyone is asleep.  

Use household appliances properly

Use appliances like the dishwasher and the clothes washer when you have a full load. A half empty washer uses the same amount of energy as a full one. A fridge works more efficiently if it’s not too full. The reverse applies to the freezer as it works best when it two-thirds full. Apply these simple concepts to everyday living that will help you save in the long run. 

Install Compact Fluorescent (CFL) Bulbs

Instead of using traditional lighting fixtures to light up your indoor spaces, replace them with CFL bulbs as they use 75% less power and lasts for upto 10 times longer than normal bulbs. 

Consider caulking and weather stripping

One important thing that delivers a great return during winter and summer is taking time to plug up air leaks around doors and windows. You can look for cracks and apply caulk on immovable building components to prevent air leakage. Weatherstrip is also another method to create a tight seal around movable building components such as doors and operable windows. 

Invest on Energy Star appliances

Fight climate and save energy by investing in energy star products. Switching to it is not only easy on your pocketbook but is also good for the environment. According to research, if one in ten homes used energy star products, then the impact could be compared to planting around 1.7 million acres of trees. Energy Star products use very less energy compared to traditional products. They may cost more but they help you save upto $80 on energy bills every year.