Let's talk just about 30-40% of your electricity bill. That's how much it costs the average homeowner or flyer building owner to find 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 condense their cost of life and HVAC. They don't want to sacrifice the interior environmental conditions, but they complete want a point-by-point plot to follow. The fascinating matter that often happens is that life bills are lowered substantially and the HVAC system function is improved. This is a all right function of any mechanical engineer specializing in life and HVAC.
The information upon this page will help homeowners, building owners and building operators make informed decisions just about existing HVAC systems or well along upgrades.
Operation and Maintenance
The first step to reach life and HVAC system optimization is load reduction. This step normally consists of a long range plot which itemizes the deeds to be taken based upon best reward upon investment. Reducing your building load allows the existing HVAC system to function more efficiently. If a further system or systems are subconscious considered, it will be more cost keen to design for the shortened load as opposed to the existing load. A few common load dwindling strategies include:
Tighten the building shell and amass further insulation. supplement insulation in existing buildings may not be achievable in some instances, as a result 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 still have single pane windows. The installation of double pane windows taking into consideration a thermal fracture is a great reward upon investment. make distinct they are life STAR certified 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 ration of the HVAC load and more or less any efforts in this supervision will humiliate the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always life efficient and should not be considered if you want to condense life and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned declare than older rosy technology. If you have a reward ventilate plenum on the other hand of reward ventilate ductwork, consider light troffers as a result 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 aptitude stasher different will condense the sensible heat get in the space. Items to consider improve copy machines, kitchen equipment, computers and refrigerators.
Control ventilation by having your outdoor ventilate balanced. Most building owners have drawings of the indigenous HVAC system installation. Have the drawings reviewed by a mechanical engineer to announce your outdoor ventilate flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should still be adept to make recommendations for improvement.
Addressing these items is your first step to reducing life and HVAC costs.
The second step to reach life and HVAC system optimization is knowing your system. Your HVAC system is critical to your interior environment, but it then represents a large component of your relief expenses. though it is greater than the scope of this article to discuss all system, a few recommendations can be addressed. all HVAC system component has increased in efficiency greater than the years. If your system is more than 13 years old, it's time to begin planning for an remodel to further equipment. with ease maintained residential systems have a life expectancy of just about 15 years or as a result 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 similar lifetime can be expected. For larger flyer 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 all these systems have in common is they are normally fueled by electricity. Electricity cost money, as a result any efforts in the supervision of increased efficiency is a plus.
HVAC System Tips:
Find a certified consultant you trust. If you are a home owner or little flyer building owner, find a good HVAC company or mechanic to evaluate and preserve your system. If you are a large flyer building owner, find a flyer HVAC company for normal child maintenance and a good mechanical engineer for specific guidance. I complete not suggest using a mechanical engineer employed by the HVAC Company; find a third party engineer for unprejudiced information.
Verify your HVAC system load. home owners should use ACCA's calendar J totaling method and all others should have a load conducted by a mechanical engineer. flyer buildings have more requirements amalgamated to code conformance, minimum ventilation rates, etc and are individual to each building.
Load reduction-Read the information 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 with ease as function it. get the load and the equipment selection right the first time.
Purchase high efficiency or life Star equipment. Many of the further systems improve flexible promptness drives for fans and compressors. greater than the years of ownership this will be paid help many time over. Compare all right efficiency equipment to high efficiency equipment in terms of initial cost and life cycle costs. Any good HVAC company or mechanical engineer can attain this information.
Consider some form of life recovery for any ventilate exhausted from the building and use it to condition the incoming light air. This is ventilate you have paid to condition, as a result extracting some of the life previously exhausting it should be a priority.
For large flyer buildings, consider conditioning the outdoor ventilate taking into consideration a dedicated outdoor ventilate unit. This will eliminate any problems amalgamated to humidity direct in most instances. It will then deposit occupant comfort and allow for further downsizing of equipment.
Commercial buildings should consider economizers upon their equipment. Most current codes require economizers upon equipment greater than 15 tons in size. Often nearby at a low incremental cost, these units glamor in light ventilate from the outdoor taking into consideration the temperature (sometimes humidity) outdoor is humiliate than the temperature inside.
Home owners and little flyer building owners should install programmable thermostats. flyer building owners should install a direct Digital direct (DDC) system. The investment in either of these will pay help more than the cost in a little amount of time. approach more below.
The third step to reach life and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving life easy. One of the best investments for the homeowner or little flyer building owner is a programmable thermostat. These are simple to use and incorporate strategies based upon time scheduling. Most manufacturers find the money for 7 hours of daylight programs and setback/setup programs which will turn the HVAC system upon and off to compliment your schedule and desired indoor temperature. This is a great pretension to ensure HVAC systems are used only taking into consideration necessary.
DDC Systems-For the large flyer building, I consider this as a must have system. Installation costs have steadily decreased and the function 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, compound zone control, compound temperature sensor locations and ventilation control. The best ration of these systems is their attainment to be scaled occurring to the largest of flyer applications. This means you can install a simple system and amass more controls well along to incorporate your comprehensive HVAC system. Again, the payback is rushed and with ease worth the investment.
Operation and Maintenance
The fourth and last step to reach life and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are with ease maintained. Ensure reliability, efficiency and a long life for your HVAC system by taking into consideration these tips.
Find a certified consultant you trust. If you are a home owner or little flyer building owner, find a good HVAC company or mechanic to evaluate and preserve your system. If you are a large flyer building owner, find a flyer HVAC company for normal maintenance. make distinct you collection and document all servicing taking into consideration dates, time and names of the servicing person.
Home owners should always get 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 all less then a MERV 5 filter to assure dust and fibers are removed. tidy filters will keep aficionada energy.
Coil Cleaning-This is always a huge item overlooked by residential and flyer building owners. Condenser coils comprehensive dirt and debris upon their surfaces because they are outside. This makes the compressor function harder and results in a well along refrigerant temperature in your refrigeration system. Evaporator and heating coils comprehensive dust and fibers that declare inside your home or building. tidy them at least taking into consideration a year