Let's chat roughly 30-40% of your electricity bill. That's how much it costs the average homeowner or advertisement building owner to present proper heating, ventilating, and air-conditioning (HVAC). A good HVAC system is the key to maintaining a comfortable, healthy and interior environment. Through the years, I have been asked by many owners for a strategy to reduce their cost of enthusiasm and HVAC. They don't desire to sacrifice the interior environmental conditions, but they pull off desire a point-by-point scheme to follow. The engaging matter that often happens is that enthusiasm bills are lowered substantially and the HVAC system play in is improved. This is a satisfactory play in of any mechanical engineer specializing in enthusiasm and HVAC.
The guidance upon this page will urge on homeowners, building owners and building operators make informed decisions roughly existing HVAC systems or unconventional upgrades.
Operation and Maintenance
The first step to attain enthusiasm and HVAC system optimization is load reduction. This step normally consists of a long range scheme which itemizes the endeavors to be taken based upon best reward upon investment. Reducing your building load allows the existing HVAC system to play in more efficiently. If a extra system or systems are swine considered, it will be more cost practicing to design for the abbreviated load as opposed to the existing load. A few common load lessening strategies include:
Tighten the building shell and amass extra insulation. addendum insulation in existing buildings may not be achievable in some instances, so more consideration should be aimed at the exterior shell, especially windows and doors.
Installing energy-efficient windows. This is a huge item upon some buildings that yet have single pane windows. The installation of double pane windows taking into consideration a thermal rupture is a good reward upon investment. make positive they are enthusiasm STAR qualified windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average advertisement building has a lighting density of 2-3 watts per square foot which maintains proper lighting levels. This is a significant allowance of the HVAC load and roughly speaking any efforts in this giving out will degrade the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always enthusiasm efficient and should not be considered if you desire to reduce enthusiasm and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned make public than older burning technology. If you have a reward ventilate plenum then again of reward ventilate ductwork, judge vivacious troffers so that some of the heat from the lights is returned to the HVAC system then again of going into the occupied area.
Selecting efficient equipment and electronic devices that have a faculty collector marginal will reduce the sensible heat gain in the space. Items to judge include copy machines, kitchen equipment, computers and refrigerators.
Control drying by having your external ventilate balanced. Most building owners have drawings of the native HVAC system installation. Have the drawings reviewed by a mechanical engineer to establish your external ventilate flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should yet be practiced to make recommendations for improvement.
Addressing these items is your first step to reducing enthusiasm and HVAC costs.
The second step to attain enthusiasm and HVAC system optimization is knowing your system. Your HVAC system is valuable to your interior environment, but it also represents a large component of your relief expenses. even though it is higher than the scope of this article to discuss all system, a few recommendations can be addressed. all HVAC system component has increased in efficiency higher than the years. If your system is more than 13 years old, it's mature to start planning for an upgrade to extra equipment. well maintained residential systems have a enthusiasm expectancy of roughly 15 years or so but seem to fail at the worse times. Have a replacement scheme ready for the hours of daylight your equipment fails.
Commercial systems vary, but if your building is using packaged equipment or split systems, the similar lifetime can be expected. For larger advertisement systems and industrial applications, the HVAC system may be more rarefied and require an individual analysis by a mechanical engineer. As I said, HVAC systems amend and no one-size-fits-all analysis works for larger systems. What all these systems have in common is they are normally fueled by electricity. Electricity cost money, so any efforts in the giving out of increased efficiency is a plus.
HVAC System Tips:
Find a qualified consultant you trust. If you are a home owner or small advertisement building owner, find a good HVAC company or mechanic to evaluate and maintain your system. If you are a large advertisement building owner, find a advertisement HVAC company for usual child maintenance and a good mechanical engineer for specific guidance. I pull off not recommend using a mechanical engineer employed by the HVAC Company; find a third party engineer for advanced information.
Verify your HVAC system load. home owners should use ACCA's encyclopedia J calculation method and all others should have a load conducted by a mechanical engineer. advertisement buildings have more requirements joined to code conformance, minimum drying rates, etc and are individual to each building.
Load reduction-Read the guidance above.
Select equipment sized for your load. NEVER OVERSIZE! More-is-better does not apply for HVAC systems. It will cost more to buy the equipment as well as play in it. acquire the load and the equipment selection right the first time.
Purchase tall efficiency or enthusiasm Star equipment. Many of the extra systems include flexible zeal drives for fans and compressors. higher than the years of ownership this will be paid urge on many mature over. Compare satisfactory efficiency equipment to tall efficiency equipment in terms of initial cost and enthusiasm cycle costs. Any good HVAC company or mechanical engineer can come by this information.
Consider some form of enthusiasm recovery for any ventilate exhausted from the building and use it to condition the incoming vivacious air. This is ventilate you have paid to condition, so extracting some of the enthusiasm before exhausting it should be a priority.
For large advertisement buildings, judge conditioning the external ventilate taking into consideration a dedicated external ventilate unit. This will eliminate any problems joined to humidity manage in most instances. It will also layer occupant comfort and permit for extra downsizing of equipment.
Commercial buildings should judge economizers upon their equipment. Most current codes require economizers upon equipment higher than 15 tons in size. Often genial at a low incremental cost, these units glamor in vivacious ventilate from the external taking into consideration the temperature (sometimes humidity) external is degrade than the temperature inside.
Home owners and small advertisement building owners should install programmable thermostats. advertisement building owners should install a lecture to Digital manage (DDC) system. The investment in either of these will pay urge on more than the cost in a small amount of time. admittance more below.
The third step to attain enthusiasm and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving enthusiasm easy. One of the best investments for the homeowner or small advertisement building owner is a programmable thermostat. These are simple to use and incorporate strategies based upon mature scheduling. Most manufacturers present 7 hours of daylight programs and setback/setup programs which will direction the HVAC system upon and off to compliment your schedule and desired indoor temperature. This is a good artifice to ensure HVAC systems are used only taking into consideration necessary.
DDC Systems-For the large advertisement building, I judge this as a must have system. Installation costs have steadily decreased and the play in reliability has steadily increased. They can be integrated into any system and expanded as required. Some of the more popular features of these systems are optimized start/stop of the HVAC system, complex zone control, complex temperature sensor locations and drying control. The best allowance of these systems is their finishing to be scaled in the works to the largest of advertisement applications. This means you can install a simple system and amass more controls unconventional to incorporate your cumulative HVAC system. Again, the payback is rushed and well worth the investment.
Operation and Maintenance
The fourth and last step to attain enthusiasm and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are well maintained. Ensure reliability, efficiency and a long enthusiasm for your HVAC system by taking into consideration these tips.
Find a qualified consultant you trust. If you are a home owner or small advertisement building owner, find a good HVAC company or mechanic to evaluate and maintain your system. If you are a large advertisement building owner, find a advertisement HVAC company for usual maintenance. make positive you folder and document all servicing taking into consideration dates, mature and names of the servicing person.
Home owners should always acquire a seasonal song up. The operation of your system will amend taking into consideration the seasons of the year.
Replace your ventilate filters regularly. Don't use everything less later a MERV 5 filter to assure dust and fibers are removed. clean filters will save fan energy.
Coil Cleaning-This is always a huge item overlooked by residential and advertisement building owners. Condenser coils cumulative dirt and debris upon their surfaces because they are outside. This makes the compressor play in harder and results in a unconventional refrigerant temperature in your refrigeration system. Evaporator and heating coils cumulative dust and fibers that make public inside your home or building. clean them at least taking into consideration a year