Let's talk virtually 30-40% of your electricity bill. That's how much it costs the average homeowner or flyer building owner to come up with the money 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 activity and HVAC. They don't want to sacrifice the interior environmental conditions, but they reach want a point-by-point plot to follow. The fascinating matter that often happens is that activity bills are lowered substantially and the HVAC system feign is improved. This is a customary feign of any mechanical engineer specializing in activity and HVAC.
The opinion upon this page will assist homeowners, building owners and building operators make informed decisions virtually existing HVAC systems or vanguard upgrades.
Operation and Maintenance
The first step to achieve activity and HVAC system optimization is load reduction. This step normally consists of a long range plot which itemizes the undertakings to be taken based upon best compensation upon investment. Reducing your building load allows the existing HVAC system to feign more efficiently. If a new system or systems are beast considered, it will be more cost working to design for the reduced load as opposed to the existing load. A few common load tapering off strategies include:
Tighten the building shell and increase new insulation. appendage 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 upon some buildings that yet have single pane windows. The installation of double pane windows similar to a thermal break is a great compensation upon investment. make sure they are activity STAR qualified 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 just about any efforts in this giving out will lower the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always activity efficient and should not be considered if you want to reduce activity and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned heavens than older warm technology. If you have a compensation ventilate plenum on the other hand of compensation ventilate ductwork, deem blithe troffers for that reason 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 capability collector complementary will reduce the sensible heat get in the space. Items to deem enhance copy machines, kitchen equipment, computers and refrigerators.
Control freshening by having your outside ventilate balanced. Most building owners have drawings of the original HVAC system installation. Have the drawings reviewed by a mechanical engineer to state your outside ventilate flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should yet be competent to make recommendations for improvement.
Addressing these items is your first step to reducing activity and HVAC costs.
The second step to achieve activity and HVAC system optimization is knowing your system. Your HVAC system is indispensable to your interior environment, but it moreover represents a large component of your minister to expenses. while it is higher than the scope of this article to discuss every system, a few recommendations can be addressed. every HVAC system component has increased in efficiency higher than the years. If your system is more than 13 years old, it's get older to start planning for an amend to new equipment. well maintained residential systems have a activity expectancy of virtually 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 perplexing and require an individual analysis by a mechanical engineer. As I said, HVAC systems rework 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 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 flyer building owner, find a good HVAC company or mechanic to examine and preserve your system. If you are a large flyer building owner, find a flyer HVAC company for usual maintenance and a good mechanical engineer for specific guidance. I reach not recommend using a mechanical engineer employed by the HVAC Company; find a third party engineer for enlightened information.
Verify your HVAC system load. home owners should use ACCA's directory J adding together method and every others should have a load conducted by a mechanical engineer. flyer buildings have more requirements combined to code conformance, minimum freshening 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 purchase the equipment as well as feign it. get the load and the equipment selection right the first time.
Purchase tall efficiency or activity Star equipment. Many of the new systems enhance adaptable rapidity drives for fans and compressors. higher than the years of ownership this will be paid assist many get older over. Compare customary efficiency equipment to tall efficiency equipment in terms of initial cost and activity cycle costs. Any good HVAC company or mechanical engineer can purchase this information.
Consider some form of activity recovery for any ventilate exhausted from the building and use it to condition the incoming blithe air. This is ventilate you have paid to condition, for that reason extracting some of the activity previously exhausting it should be a priority.
For large flyer buildings, deem conditioning the outside ventilate similar to a dedicated outside ventilate unit. This will eliminate any problems combined to humidity govern in most instances. It will moreover mass occupant comfort and allow for new downsizing of equipment.
Commercial buildings should deem economizers upon their equipment. Most current codes require economizers upon equipment higher than 15 tons in size. Often easy to get to at a low incremental cost, these units magnetism in blithe ventilate from the outside similar to the temperature (sometimes humidity) outside is lower than the temperature inside.
Home owners and small flyer building owners should install programmable thermostats. flyer building owners should install a forward Digital govern (DDC) system. The investment in either of these will pay assist more than the cost in a small amount of time. edit more below.
The third step to achieve activity and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving activity easy. One of the best investments for the homeowner or small flyer building owner is a programmable thermostat. These are simple to use and incorporate strategies based upon get older scheduling. Most manufacturers come up with the money for 7 daylight programs and setback/setup programs which will slant the HVAC system upon and off to compliment your schedule and desired indoor temperature. This is a great mannerism to ensure HVAC systems are used on your own similar to necessary.
DDC Systems-For the large flyer building, I deem this as a must have system. Installation costs have steadily decreased and the feign 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, fused zone control, fused temperature sensor locations and freshening control. The best part of these systems is their talent to be scaled occurring to the largest of flyer applications. This means you can install a simple system and increase more controls vanguard to incorporate your amassed HVAC system. Again, the payback is immediate and well worth the investment.
Operation and Maintenance
The fourth and last step to achieve activity and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are well maintained. Ensure reliability, efficiency and a long activity for your HVAC system by similar to these tips.
Find a qualified consultant you trust. If you are a home owner or small flyer building owner, find a good HVAC company or mechanic to examine and preserve your system. If you are a large flyer building owner, find a flyer HVAC company for usual maintenance. make sure you lp and document every servicing similar to dates, get older and names of the servicing person.
Home owners should always get a seasonal song up. The operation of your system will rework similar to the seasons of the year.
Replace your ventilate filters regularly. Don't use everything less then a MERV 5 filter to assure dust and fibers are removed. clean filters will keep lover energy.
Coil Cleaning-This is always a huge item overlooked by residential and flyer building owners. Condenser coils amassed dirt and debris upon their surfaces because they are outside. This makes the compressor feign harder and results in a vanguard refrigerant temperature in your refrigeration system. Evaporator and heating coils amassed dust and fibers that heavens inside your home or building. clean them at least similar to a year