Let's chat virtually 30-40% of your electricity bill. That's how much it costs the average homeowner or classified ad building owner to allow 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 abbreviate their cost of energy and HVAC. They don't want to sacrifice the interior environmental conditions, but they accomplish want a point-by-point plot to follow. The engaging thing that often happens is that energy bills are lowered substantially and the HVAC system act out is improved. This is a welcome act out of any mechanical engineer specializing in energy and HVAC.
The suggestion upon this page will help homeowners, building owners and building operators make informed decisions virtually existing HVAC systems or superior upgrades.
Operation and Maintenance
The first step to attain energy and HVAC system optimization is load reduction. This step normally consists of a long range plot which itemizes the activities to be taken based upon best compensation upon investment. Reducing your building load allows the existing HVAC system to act out more efficiently. If a further system or systems are bodily considered, it will be more cost energetic to design for the condensed load as opposed to the existing load. A few common load reduction strategies include:
Tighten the building shell and ensue further insulation. addendum insulation in existing buildings may not be achievable in some instances, appropriately 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 later than a thermal rupture is a great compensation upon investment. make positive they are energy STAR certified windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average classified ad 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 roughly speaking any efforts in this giving out will humiliate the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always energy efficient and should not be considered if you want to abbreviate energy and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned tune than older bright technology. If you have a compensation freshen plenum then again of compensation freshen ductwork, judge buoyant troffers appropriately that some of the heat from the lights is returned to the HVAC system then again of going into the occupied area.
Selecting efficient equipment and electronic devices that have a talent miser out of the ordinary will abbreviate the sensible heat get in the space. Items to judge tote up copy machines, kitchen equipment, computers and refrigerators.
Control ventilation by having your external freshen balanced. Most building owners have drawings of the native HVAC system installation. Have the drawings reviewed by a mechanical engineer to encourage your external freshen flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should yet be skilled to make recommendations for improvement.
Addressing these items is your first step to reducing energy and HVAC costs.
The second step to attain energy and HVAC system optimization is knowing your system. Your HVAC system is essential to your interior environment, but it plus represents a large component of your facilitate expenses. while it is beyond the scope of this article to discuss all system, a few recommendations can be addressed. all HVAC system component has increased in efficiency beyond the years. If your system is more than 13 years old, it's times to start planning for an restructure to further equipment. with ease maintained residential systems have a energy expectancy of virtually 15 years or appropriately 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 classified ad systems and industrial applications, the HVAC system may be more obscure 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, appropriately any efforts in the giving out of increased efficiency is a plus.
HVAC System Tips:
Find a certified consultant you trust. If you are a home owner or small classified ad building owner, locate a fine HVAC company or mechanic to probe and preserve your system. If you are a large classified ad building owner, locate a classified ad HVAC company for usual maintenance and a fine mechanical engineer for specific guidance. I accomplish not recommend using a mechanical engineer employed by the HVAC Company; locate a third party engineer for broadminded information.
Verify your HVAC system load. home owners should use ACCA's directory J toting up method and all others should have a load conducted by a mechanical engineer. classified ad buildings have more requirements partnered to code conformance, minimum ventilation rates, etc and are individual to each building.
Load reduction-Read the suggestion 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 with ease as act out it. acquire the load and the equipment selection right the first time.
Purchase high efficiency or energy Star equipment. Many of the further systems tote up modifiable rapidity drives for fans and compressors. beyond the years of ownership this will be paid help many times over. Compare welcome efficiency equipment to high efficiency equipment in terms of initial cost and energy cycle costs. Any fine HVAC company or mechanical engineer can attain this information.
Consider some form of energy recovery for any freshen exhausted from the building and use it to condition the incoming buoyant air. This is freshen you have paid to condition, appropriately extracting some of the energy since exhausting it should be a priority.
For large classified ad buildings, judge conditioning the external freshen later than a dedicated external freshen unit. This will eliminate any problems partnered to humidity govern in most instances. It will plus accumulation occupant comfort and allow for further downsizing of equipment.
Commercial buildings should judge economizers upon their equipment. Most current codes require economizers upon equipment beyond 15 tons in size. Often to hand at a low incremental cost, these units charm in buoyant freshen from the external later than the temperature (sometimes humidity) external is humiliate than the temperature inside.
Home owners and small classified ad building owners should install programmable thermostats. classified ad building owners should install a deal with Digital govern (DDC) system. The investment in either of these will pay help more than the cost in a small amount of time. open more below.
The third step to attain energy and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving energy easy. One of the best investments for the homeowner or small classified ad building owner is a programmable thermostat. These are simple to use and incorporate strategies based upon times scheduling. Most manufacturers allow 7 hours of daylight programs and setback/setup programs which will face 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 unaccompanied later than necessary.
DDC Systems-For the large classified ad building, I judge this as a must have system. Installation costs have steadily decreased and the act out 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, merged zone control, merged temperature sensor locations and ventilation control. The best allowance of these systems is their finishing to be scaled up to the largest of classified ad applications. This means you can install a simple system and ensue more controls superior to incorporate your combined HVAC system. Again, the payback is sharp and with ease worth the investment.
Operation and Maintenance
The fourth and last step to attain energy and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are with ease maintained. Ensure reliability, efficiency and a long energy for your HVAC system by later than these tips.
Find a certified consultant you trust. If you are a home owner or small classified ad building owner, locate a fine HVAC company or mechanic to probe and preserve your system. If you are a large classified ad building owner, locate a classified ad HVAC company for usual maintenance. make positive you autograph album and document all servicing later than dates, times and names of the servicing person.
Home owners should always acquire a seasonal song up. The operation of your system will amend later than the seasons of the year.
Replace your freshen filters regularly. Don't use all less then a MERV 5 filter to assure dust and fibers are removed. clean filters will keep follower energy.
Coil Cleaning-This is always a huge item overlooked by residential and classified ad building owners. Condenser coils combined dirt and debris upon their surfaces because they are outside. This makes the compressor act out harder and results in a superior refrigerant temperature in your refrigeration system. Evaporator and heating coils combined dust and fibers that tune inside your home or building. clean them at least later than a year