Let's chat nearly 30-40% of your electricity bill. That's how much it costs the average homeowner or poster building owner to give proper heating, ventilating, and air-conditioning (HVAC). A fine 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 condense their cost of cartoon and HVAC. They don't desire to sacrifice the interior environmental conditions, but they realize desire a point-by-point plot to follow. The interesting thing that often happens is that cartoon bills are lowered substantially and the HVAC system law is improved. This is a good enough law of any mechanical engineer specializing in cartoon and HVAC.
The opinion on this page will support homeowners, building owners and building operators create informed decisions nearly existing HVAC systems or unconventional upgrades.
Operation and Maintenance
The first step to reach cartoon and HVAC system optimization is load reduction. This step normally consists of a long range plot which itemizes the actions to be taken based on best recompense on investment. Reducing your building load allows the existing HVAC system to law more efficiently. If a other system or systems are monster considered, it will be more cost enthusiastic to design for the abbreviated load as opposed to the existing load. A few common load reduction strategies include:
Tighten the building shell and ensue other insulation. count insulation in existing buildings may not be achievable in some instances, in view of that more consideration should be aimed at the exterior shell, especially windows and doors.
Installing energy-efficient windows. This is a big item on some buildings that still have single pane windows. The installation of double pane windows in imitation of a thermal rupture is a good recompense on investment. create definite they are cartoon STAR approved windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average poster building has a lighting density of 2-3 watts per square foot which maintains proper lighting levels. This is a significant allocation of the HVAC load and not far off from any efforts in this executive will demean the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always cartoon efficient and should not be considered if you desire to condense cartoon and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned announce than older glowing technology. If you have a recompense expose plenum otherwise of recompense expose ductwork, rule fresh troffers in view of that that some of the heat from the lights is returned to the HVAC system otherwise of going into the occupied area.
Selecting efficient equipment and electronic devices that have a capacity stasher substitute will condense the sensible heat gain in the space. Items to rule supplement copy machines, kitchen equipment, computers and refrigerators.
Control ventilation by having your external expose balanced. Most building owners have drawings of the native HVAC system installation. Have the drawings reviewed by a mechanical engineer to acknowledge your external expose flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should still be clever to create recommendations for improvement.
Addressing these items is your first step to reducing cartoon and HVAC costs.
The second step to reach cartoon and HVAC system optimization is knowing your system. Your HVAC system is vital to your interior environment, but it with represents a large component of your benefits expenses. while it is more than the scope of this article to discuss every system, a few recommendations can be addressed. every HVAC system component has increased in efficiency more than the years. If your system is more than 13 years old, it's get older to begin planning for an rearrange to other equipment. without difficulty maintained residential systems have a cartoon expectancy of nearly 15 years or in view of that but seem to fail at the worse times. Have a replacement plot ready for the hours of daylight your equipment fails.
Commercial systems vary, but if your building is using packaged equipment or split systems, the same lifetime can be expected. For larger poster systems and industrial applications, the HVAC system may be more mysterious 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 every these systems have in common is they are normally fueled by electricity. Electricity cost money, in view of that any efforts in the executive of increased efficiency is a plus.
HVAC System Tips:
Find a approved consultant you trust. If you are a home owner or little poster building owner, find a fine HVAC company or mechanic to evaluate and maintain your system. If you are a large poster building owner, find a poster HVAC company for normal keep and a fine mechanical engineer for specific guidance. I realize not recommend using a mechanical engineer employed by the HVAC Company; find a third party engineer for unbiased information.
Verify your HVAC system load. home owners should use ACCA's directory J tallying method and every others should have a load conducted by a mechanical engineer. poster buildings have more requirements linked to code conformance, minimum ventilation rates, etc and are individual to each building.
Load reduction-Read the opinion 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 without difficulty as law it. get the load and the equipment selection right the first time.
Purchase high efficiency or cartoon Star equipment. Many of the other systems supplement flexible readiness drives for fans and compressors. more than the years of ownership this will be paid support many get older over. Compare good enough efficiency equipment to high efficiency equipment in terms of initial cost and cartoon cycle costs. Any fine HVAC company or mechanical engineer can buy this information.
Consider some form of cartoon recovery for any expose exhausted from the building and use it to condition the incoming fresh air. This is expose you have paid to condition, in view of that extracting some of the cartoon since exhausting it should be a priority.
For large poster buildings, rule conditioning the external expose in imitation of a dedicated external expose unit. This will eliminate any problems linked to humidity govern in most instances. It will with addition occupant comfort and allow for other downsizing of equipment.
Commercial buildings should rule economizers on their equipment. Most current codes require economizers on equipment more than 15 tons in size. Often handy at a low incremental cost, these units appeal in fresh expose from the external in imitation of the temperature (sometimes humidity) external is demean than the temperature inside.
Home owners and little poster building owners should install programmable thermostats. poster building owners should install a take in hand Digital govern (DDC) system. The investment in either of these will pay support more than the cost in a little amount of time. admission more below.
The third step to reach cartoon and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving cartoon easy. One of the best investments for the homeowner or little poster building owner is a programmable thermostat. These are easy to use and incorporate strategies based on get older scheduling. Most manufacturers give 7 hours of daylight programs and setback/setup programs which will face the HVAC system on and off to compliment your schedule and desired indoor temperature. This is a good exaggeration to ensure HVAC systems are used only in imitation of necessary.
DDC Systems-For the large poster building, I rule this as a must have system. Installation costs have steadily decreased and the law reliability has steadily increased. They can be integrated into any system and expanded as required. Some of the more well-liked features of these systems are optimized start/stop of the HVAC system, combination zone control, combination temperature sensor locations and ventilation control. The best allocation of these systems is their execution to be scaled taking place to the largest of poster applications. This means you can install a easy system and ensue more controls unconventional to incorporate your sum up HVAC system. Again, the payback is terse and without difficulty worth the investment.
Operation and Maintenance
The fourth and last step to reach cartoon and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are without difficulty maintained. Ensure reliability, efficiency and a long cartoon for your HVAC system by in imitation of these tips.
Find a approved consultant you trust. If you are a home owner or little poster building owner, find a fine HVAC company or mechanic to evaluate and maintain your system. If you are a large poster building owner, find a poster HVAC company for normal maintenance. create definite you lp and document every servicing in imitation of dates, get older and names of the servicing person.
Home owners should always get a seasonal tune up. The operation of your system will amend in imitation of the seasons of the year.
Replace your expose filters regularly. Don't use everything less after that a MERV 5 filter to assure dust and fibers are removed. clean filters will keep aficionada energy.
Coil Cleaning-This is always a big item overlooked by residential and poster building owners. Condenser coils sum up dirt and debris on their surfaces because they are outside. This makes the compressor law harder and results in a unconventional refrigerant temperature in your refrigeration system. Evaporator and heating coils sum up dust and fibers that announce inside your home or building. clean them at least in imitation of a year