Let's chat approximately 30-40% of your electricity bill. That's how much it costs the average homeowner or public notice 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 abbreviate their cost of excitement and HVAC. They don't desire to sacrifice the interior environmental conditions, but they reach desire a point-by-point plot to follow. The fascinating business that often happens is that excitement bills are lowered substantially and the HVAC system put on an act is improved. This is a usual put on an act of any mechanical engineer specializing in excitement and HVAC.
The instruction on this page will put up to homeowners, building owners and building operators make informed decisions approximately existing HVAC systems or forward-looking upgrades.
Operation and Maintenance
The first step to attain excitement and HVAC system optimization is load reduction. This step normally consists of a long range plot which itemizes the actions to be taken based on best compensation on investment. Reducing your building load allows the existing HVAC system to put on an act more efficiently. If a further system or systems are mammal considered, it will be more cost functioning 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 further insulation. extra insulation in existing buildings may not be achievable in some instances, so 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 nevertheless have single pane windows. The installation of double pane windows past a thermal fracture is a great compensation on investment. make certain they are excitement STAR attributed windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average public notice 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 just about any efforts in this organization will demean the cooling requirement for the building. Accent lighting (sometimes called architectural lighting) are not always excitement efficient and should not be considered if you desire to abbreviate excitement and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned declare than older warm technology. If you have a compensation freshen plenum then again of compensation freshen ductwork, judge blithe troffers so 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 capacity collector choice will abbreviate the sensible heat gain in the space. Items to judge count up copy machines, kitchen equipment, computers and refrigerators.
Control airing 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 uphold your external freshen flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should nevertheless be able to make recommendations for improvement.
Addressing these items is your first step to reducing excitement and HVAC costs.
The second step to attain excitement and HVAC system optimization is knowing your system. Your HVAC system is necessary to your interior environment, but it as a consequence represents a large component of your assist expenses. though it is on top of the scope of this article to discuss all system, a few recommendations can be addressed. all HVAC system component has increased in efficiency on top of the years. If your system is more than 13 years old, it's time to begin planning for an reorganize to further equipment. without difficulty maintained residential systems have a excitement expectancy of approximately 15 years or so but seem to fail at the worse times. Have a replacement plot 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 public notice 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 revise 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, so any efforts in the organization of increased efficiency is a plus.
HVAC System Tips:
Find a attributed consultant you trust. If you are a house owner or little public notice building owner, find a good HVAC company or mechanic to study and maintain your system. If you are a large public notice building owner, find a public notice HVAC company for usual grant and a good mechanical engineer for specific guidance. I reach not suggest using a mechanical engineer employed by the HVAC Company; find a third party engineer for open-minded information.
Verify your HVAC system load. house owners should use ACCA's directory J tallying method and all others should have a load conducted by a mechanical engineer. public notice buildings have more requirements similar to code conformance, minimum airing 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 without difficulty as put on an act it. get the load and the equipment selection right the first time.
Purchase tall efficiency or excitement Star equipment. Many of the further systems count up changeable promptness drives for fans and compressors. on top of the years of ownership this will be paid put up to many time over. Compare usual efficiency equipment to tall efficiency equipment in terms of initial cost and excitement cycle costs. Any good HVAC company or mechanical engineer can get hold of this information.
Consider some form of excitement recovery for any freshen exhausted from the building and use it to condition the incoming blithe air. This is freshen you have paid to condition, so extracting some of the excitement before exhausting it should be a priority.
For large public notice buildings, judge conditioning the external freshen past a dedicated external freshen unit. This will eliminate any problems similar to humidity manage in most instances. It will as a consequence accrual occupant comfort and allow for further downsizing of equipment.
Commercial buildings should judge economizers on their equipment. Most current codes require economizers on equipment on top of 15 tons in size. Often manageable at a low incremental cost, these units charisma in blithe freshen from the external past the temperature (sometimes humidity) external is demean than the temperature inside.
Home owners and little public notice building owners should install programmable thermostats. public notice building owners should install a tackle Digital manage (DDC) system. The investment in either of these will pay put up to more than the cost in a little amount of time. right of entry more below.
The third step to attain excitement and HVAC system optimization is controlling your system.
Programmable Thermostats-The age of digital controls has made saving excitement easy. One of the best investments for the homeowner or little public notice building owner is a programmable thermostat. These are easy to use and incorporate strategies based on time scheduling. Most manufacturers find the money for 7 day programs and setback/setup programs which will twist the HVAC system on and off to praise your schedule and desired indoor temperature. This is a great way to ensure HVAC systems are used forlorn past necessary.
DDC Systems-For the large public notice building, I judge this as a must have system. Installation costs have steadily decreased and the put on an act 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 airing control. The best ration of these systems is their completion to be scaled stirring to the largest of public notice applications. This means you can install a easy system and increase more controls forward-looking to incorporate your summative HVAC system. Again, the payback is sharp and without difficulty worth the investment.
Operation and Maintenance
The fourth and last step to attain excitement and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are without difficulty maintained. Ensure reliability, efficiency and a long excitement for your HVAC system by past these tips.
Find a attributed consultant you trust. If you are a house owner or little public notice building owner, find a good HVAC company or mechanic to study and maintain your system. If you are a large public notice building owner, find a public notice HVAC company for usual maintenance. make certain you cassette and document all servicing past dates, time and names of the servicing person.
Home owners should always get a seasonal tune up. The operation of your system will revise past the seasons of the year.
Replace your freshen filters regularly. Don't use whatever less subsequently a MERV 5 filter to assure dust and fibers are removed. tidy filters will keep aficionado energy.
Coil Cleaning-This is always a huge item overlooked by residential and public notice building owners. Condenser coils summative dirt and debris on their surfaces because they are outside. This makes the compressor put on an act harder and results in a forward-looking refrigerant temperature in your refrigeration system. Evaporator and heating coils summative dust and fibers that declare inside your house or building. tidy them at least past a year