When it comes to heating and cooling systems, few people long for the "good old days". Subconsciously at least, most people probably realize that the HVAC systems produced today are far more efficient than those of a couple of decades ago but translating this knowledge into positive action and benefits however, is another story.

    If your furnace, air conditioner, or heat pump is 12 years old or older, and even if it works properly, it may make economic sense to replace it with a modern high efficiency unit, especially in these trying economic times of rising fuel prices and potential shortages due to global interruptions.

     Some of the HVAC higher efficiency models available today can save you a lot of money in operating costs and along with Federal refunds from the newly enacted Stimulus fund, can help offset the initial installation expense. The nonprofit American Council for an Energy-Efficient Economy offers this advice on replacing your existing heating system:

	“The efficiency of older furnace and heat pumps systems, range from 56% to 70%. Modern heating systems, on the other hand, can achieve efficiencies as high as 99%, converting nearly all the fuel to useful heat for your home. Home energy efficiency upgrades and a new high-efficiency heating system can often cut your energy bills, as well as your systems pollution output, in half”.

     New combustion design and technologies for furnaces, that extract more heat from the same amount of fuel plus optimized control technology, allows for additional energy savings. And the potential energy savings from an upgraded heating system do not necessarily require a new furnace in the utility area or a solar system on the roof.

     Without intelligent control technology i.e., even an efficient heating system, often supplies more heat than is actually needed. Modern controls not only combine all components of the heating system but also adapt their operation to the prevailing weather conditions and the actual heat requirements in the individual rooms.

     Today ’s modern heating systems use controls that are based on outside temperatures as well as inside requirements, and help lower or increase the temperature in the house by adjusting the heating cycle depending on the temperature measured by these sensors.

     Programmable thermostats produce additional energy savings by supplying only the amount of heat actually needed during the night or during times of absence. These modern, microprocessor controls, go far beyond the old “on-off” switches of yesteryear. Featuring an integrated optimization mechanism, which following an initial learning phase, automatically optimizes the timing of the daytime and nighttime settings to meet the required room temperatures.

     Two-stage heating means the furnace operates on two levels of heating…high for cold days…low for milder days. This sophisticated technology, substantially improves inside comfort conditions, even while lowering operating costs. I.e., the lower setting is usually adequate for 80 to 90 percent of the time. This means that although the furnace runs for longer periods, by operating at the lower output of heat, it actually provides more comfort even while burning less fuel.

     Variable speed blowers that work in conjunction with two stage heating further enhances indoor comfort. The main advantage of the prolonged running of the heating system is to avoid air stratification. This  provides more even temperatures in the house…quieter operation…and better air quality, because the blower works longer and air is circulated continuously through the filters. In addition, because the heating system and blower operates mostly in its lower capacity range, it burns less fuel than a standard furnace that always runs at full capacity and shuts off when the heating demand has been met.

     Most of the technological improvements for heating systems are also available in cooling systems. I.e., single-stage versus two-stage air conditioners.

     Single-stage units are either “on” or “off”.

     Two-stage central air conditioners can run at two speeds. Like two-stage gas furnaces, the two-speed air conditioners run at lower speeds 80% of time, kicking into high gear only on very hot days. This saves on wear and tear, since the unit cycles on and off less frequently. Two-stage systems are also better at maintaining a consistent temperature and at removing the moisture from the house. Combined with a variable speed air handler, it not only improves comfort and efficiency but allows continuous air filtering at minimum energy cost.

     Though high efficiency units typically cost more than less efficient models, there are several Federal Rebate programs (including the new Stimulus Bill) currently available to help offset the initial costs for different applications. In addition you may further reduce initial costs if your HVAC contractor determines that you need a smaller unit compared to your present one.

     Remember also that any cost difference will be paid back over time through lower energy bills. Heating and cooling are the largest energy expense in most homes, accounting for 45-50% of annual energy bills in our area. Reducing your total energy use is the single and most effective way to save money and reduce your home’s contribution to global environmental problems.

     To get started: First & foremost, is to find a Quality Contractor. Be sure your HVAC contractor sizes the system properly; don’t let the contractor simply propose a system of the same size as your old, existing unit. Proper design and sizing can be as important as the installation. An oversized furnace, air conditioner, or heat pump, even if it keeps you warm or cool, will start up and shut down frequently, experiencing needless wear and tear and causing it to operate inefficiently. A correctly sized, high efficiency system, properly installed will tend to operate at a constant level during much of its operation.

     If you need more information on available Federal rebates…“21 Century HVAC Systems & Controls”…or any other questions pertaining to HVAC systems or service, contact one of our very knowledgeable design representatives in any of the following ways:

	1.  Call: 757.468.5800.
	2.  Email (comfort@climatemakers.com)
	3.  Visit our 350+ page website (www.climatemakers.com)

     There is no obligation, and of course, don’t miss the next installment of “Climatemakers’ Circle of Comfort” for the latest Indoor Health & Comfort tips for your family!

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