Let's talk more or less 30-40% of your electricity bill. That's how much it costs the average homeowner or advertisement building owner to offer 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 abbreviate their cost of enthusiasm and HVAC. They don't desire to sacrifice the interior environmental conditions, but they do desire a point-by-point plan to follow. The fascinating issue that often happens is that enthusiasm bills are lowered substantially and the HVAC system measure is improved. This is a welcome measure of any mechanical engineer specializing in enthusiasm and HVAC.
The guidance upon this page will encourage homeowners, building owners and building operators make informed decisions more or less existing HVAC systems or superior 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 plan which itemizes the actions to be taken based upon best compensation upon investment. Reducing your building load allows the existing HVAC system to measure more efficiently. If a additional system or systems are inborn considered, it will be more cost functioning to design for the edited load as opposed to the existing load. A few common load point strategies include:
Tighten the building shell and ensue additional insulation. surcharge insulation in existing buildings may not be achievable in some instances, therefore more consideration should be aimed at the exterior shell, especially windows and doors.
Installing energy-efficient windows. This is a big item upon some buildings that still have single pane windows. The installation of double pane windows later a thermal rupture is a great compensation upon investment. make clear they are enthusiasm STAR recognized 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 nearly any efforts in this paperwork will belittle 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 abbreviate enthusiasm and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned tune than older radiant technology. If you have a compensation air plenum on the other hand of compensation air ductwork, adjudicate lively troffers therefore that some of the heat from the lights is returned to the HVAC system on the other hand of going into the occupied area.
Selecting efficient equipment and electronic devices that have a capacity saver unconventional will abbreviate the sensible heat get in the space. Items to adjudicate tote up copy machines, kitchen equipment, computers and refrigerators.
Control freshening by having your external air balanced. Most building owners have drawings of the native HVAC system installation. Have the drawings reviewed by a mechanical engineer to support your external air flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should still be skilled 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 next represents a large component of your sustain expenses. even if it is beyond the scope of this article to discuss every system, a few recommendations can be addressed. every HVAC system component has increased in efficiency beyond the years. If your system is more than 13 years old, it's time to begin planning for an rearrange to additional equipment. competently maintained residential systems have a enthusiasm expectancy of more or less 15 years or therefore but seem to fail at the worse times. Have a replacement plan ready for the day your equipment fails.
Commercial systems vary, but if your building is using packaged equipment or split systems, the thesame lifetime can be expected. For larger advertisement systems and industrial applications, the HVAC system may be more technical and require an individual analysis by a mechanical engineer. As I said, HVAC systems modify 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, therefore any efforts in the paperwork of increased efficiency is a plus.
HVAC System Tips:
Find a recognized consultant you trust. If you are a house owner or small advertisement building owner, find a good HVAC company or mechanic to evaluate and preserve your system. If you are a large advertisement building owner, find a advertisement HVAC company for normal child support and a good mechanical engineer for specific guidance. I do not suggest using a mechanical engineer employed by the HVAC Company; find a third party engineer for liberal information.
Verify your HVAC system load. house owners should use ACCA's reference book J totaling method and every others should have a load conducted by a mechanical engineer. advertisement buildings have more requirements associated to code conformance, minimum freshening 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 purchase the equipment as competently as measure it. get the load and the equipment selection right the first time.
Purchase tall efficiency or enthusiasm Star equipment. Many of the additional systems tote up amendable keenness drives for fans and compressors. beyond the years of ownership this will be paid encourage many time over. Compare welcome efficiency equipment to tall efficiency equipment in terms of initial cost and enthusiasm cycle costs. Any good HVAC company or mechanical engineer can get hold of this information.
Consider some form of enthusiasm recovery for any air exhausted from the building and use it to condition the incoming lively air. This is air you have paid to condition, therefore extracting some of the enthusiasm before exhausting it should be a priority.
For large advertisement buildings, adjudicate conditioning the external air later a dedicated external air unit. This will eliminate any problems associated to humidity manage in most instances. It will next growth occupant comfort and permit for additional downsizing of equipment.
Commercial buildings should adjudicate economizers upon their equipment. Most current codes require economizers upon equipment beyond 15 tons in size. Often easily reached at a low incremental cost, these units fascination in lively air from the external later the temperature (sometimes humidity) external is belittle than the temperature inside.
Home owners and small advertisement building owners should install programmable thermostats. advertisement building owners should install a take up Digital manage (DDC) system. The investment in either of these will pay encourage 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 easy to use and incorporate strategies based upon time scheduling. Most manufacturers offer 7 day programs and setback/setup programs which will slant the HVAC system upon and off to praise your schedule and desired indoor temperature. This is a great quirk to ensure HVAC systems are used abandoned later necessary.
DDC Systems-For the large advertisement building, I adjudicate this as a must have system. Installation costs have steadily decreased and the measure 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, combined zone control, combined temperature sensor locations and freshening control. The best allowance of these systems is their exploit to be scaled occurring to the largest of advertisement applications. This means you can install a easy system and ensue more controls superior to incorporate your gather together HVAC system. Again, the payback is short and competently 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 competently maintained. Ensure reliability, efficiency and a long enthusiasm for your HVAC system by later these tips.
Find a recognized consultant you trust. If you are a house owner or small advertisement building owner, find a good HVAC company or mechanic to evaluate and preserve your system. If you are a large advertisement building owner, find a advertisement HVAC company for normal maintenance. make clear you sticker album and document every servicing later dates, time and names of the servicing person.
Home owners should always get a seasonal song up. The operation of your system will modify later the seasons of the year.
Replace your air filters regularly. Don't use all less later a MERV 5 filter to assure dust and fibers are removed. clean filters will save follower energy.
Coil Cleaning-This is always a big item overlooked by residential and advertisement building owners. Condenser coils gather together dirt and debris upon their surfaces because they are outside. This makes the compressor measure harder and results in a superior refrigerant temperature in your refrigeration system. Evaporator and heating coils gather together dust and fibers that tune inside your house or building. clean them at least later a year