Let's talk not quite 30-40% of your electricity bill. That's how much it costs the average homeowner or flyer building owner to pay for 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 want to sacrifice the interior environmental conditions, but they realize want a point-by-point plot to follow. The engaging situation that often happens is that enthusiasm bills are lowered substantially and the HVAC system piece of legislation is improved. This is a within acceptable limits piece of legislation of any mechanical engineer specializing in enthusiasm and HVAC.
The instruction on this page will assist homeowners, building owners and building operators make informed decisions not quite existing HVAC systems or future 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 plot which itemizes the undertakings to be taken based on best reward on investment. Reducing your building load allows the existing HVAC system to piece of legislation more efficiently. If a other system or systems are creature considered, it will be more cost working to design for the reduced load as opposed to the existing load. A few common load narrowing strategies include:
Tighten the building shell and grow other insulation. adding together insulation in existing buildings may not be achievable in some instances, for that reason more consideration should be aimed at the exterior shell, especially windows and doors.
Installing energy-efficient windows. This is a huge item on some buildings that still have single pane windows. The installation of double pane windows when a thermal rupture is a good reward on investment. make determined they are enthusiasm STAR attributed windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average flyer building has a lighting density of 2-3 watts per square foot which maintains proper lighting levels. This is a significant part of the HVAC load and approaching any efforts in this management will demean the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always enthusiasm efficient and should not be considered if you want to reduce enthusiasm and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned flavor than older afire technology. If you have a reward let breathe plenum instead of reward let breathe ductwork, consider spacious troffers for that reason that some of the heat from the lights is returned to the HVAC system instead of going into the occupied area.
Selecting efficient equipment and electronic devices that have a capacity magpie different will reduce the sensible heat get in the space. Items to consider improve copy machines, kitchen equipment, computers and refrigerators.
Control drying by having your outdoor let breathe balanced. Most building owners have drawings of the indigenous HVAC system installation. Have the drawings reviewed by a mechanical engineer to acknowledge your outdoor let breathe flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should still be competent 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 indispensable to your interior environment, but it also represents a large component of your abet expenses. even if it is greater than the scope of this article to discuss every system, a few recommendations can be addressed. every HVAC system component has increased in efficiency greater than the years. If your system is more than 13 years old, it's times to start planning for an amend to other equipment. well maintained residential systems have a enthusiasm expectancy of not quite 15 years or for that reason but seem to fail at the worse times. Have a replacement plot ready for the daylight 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 flyer systems and industrial applications, the HVAC system may be more profound and require an individual analysis by a mechanical engineer. As I said, HVAC systems change 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, for that reason any efforts in the management of increased efficiency is a plus.
HVAC System Tips:
Find a attributed consultant you trust. If you are a house owner or little flyer building owner, locate a good HVAC company or mechanic to explore and maintain your system. If you are a large flyer building owner, locate a flyer HVAC company for normal child support and a good mechanical engineer for specific guidance. I realize not recommend using a mechanical engineer employed by the HVAC Company; locate a third party engineer for unbiased information.
Verify your HVAC system load. house owners should use ACCA's reference book J count method and every others should have a load conducted by a mechanical engineer. flyer buildings have more requirements joined to code conformance, minimum drying rates, etc and are individual to each building.
Load reduction-Read the instruction 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 piece of legislation it. acquire the load and the equipment selection right the first time.
Purchase high efficiency or enthusiasm Star equipment. Many of the other systems improve modifiable keenness drives for fans and compressors. greater than the years of ownership this will be paid assist many times over. Compare within acceptable limits efficiency equipment to high efficiency equipment in terms of initial cost and enthusiasm cycle costs. Any good HVAC company or mechanical engineer can get your hands on this information.
Consider some form of enthusiasm recovery for any let breathe exhausted from the building and use it to condition the incoming spacious air. This is let breathe you have paid to condition, for that reason extracting some of the enthusiasm since exhausting it should be a priority.
For large flyer buildings, consider conditioning the outdoor let breathe when a dedicated outdoor let breathe unit. This will eliminate any problems joined to humidity direct in most instances. It will also deposit occupant comfort and permit for other downsizing of equipment.
Commercial buildings should consider economizers on their equipment. Most current codes require economizers on equipment greater than 15 tons in size. Often understandable at a low incremental cost, these units appeal in spacious let breathe from the outdoor when the temperature (sometimes humidity) outdoor is demean than the temperature inside.
Home owners and little flyer building owners should install programmable thermostats. flyer building owners should install a forward Digital direct (DDC) system. The investment in either of these will pay assist more than the cost in a little amount of time. edit 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 little flyer building owner is a programmable thermostat. These are easy to use and incorporate strategies based on times scheduling. Most manufacturers pay for 7 daylight programs and setback/setup programs which will aim the HVAC system on and off to praise your schedule and desired indoor temperature. This is a good exaggeration to ensure HVAC systems are used unaided when necessary.
DDC Systems-For the large flyer building, I consider this as a must have system. Installation costs have steadily decreased and the piece of legislation 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, fused zone control, fused temperature sensor locations and drying control. The best part of these systems is their talent to be scaled taking place to the largest of flyer applications. This means you can install a easy system and grow more controls future to incorporate your gather together HVAC system. Again, the payback is immediate 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 when these tips.
Find a attributed consultant you trust. If you are a house owner or little flyer building owner, locate a good HVAC company or mechanic to explore and maintain your system. If you are a large flyer building owner, locate a flyer HVAC company for normal maintenance. make determined you photograph album and document every servicing when dates, times and names of the servicing person.
Home owners should always acquire a seasonal tune up. The operation of your system will change when the seasons of the year.
Replace your let breathe filters regularly. Don't use whatever less next a MERV 5 filter to assure dust and fibers are removed. tidy filters will save follower energy.
Coil Cleaning-This is always a huge item overlooked by residential and flyer building owners. Condenser coils gather together dirt and debris on their surfaces because they are outside. This makes the compressor piece of legislation harder and results in a future refrigerant temperature in your refrigeration system. Evaporator and heating coils gather together dust and fibers that flavor inside your house or building. tidy them at least when a year