Let's chat nearly 30-40% of your electricity bill. That's how much it costs the average homeowner or advertisement building owner to manage 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 condense their cost of activity and HVAC. They don't want to sacrifice the interior environmental conditions, but they do want a point-by-point plan to follow. The interesting thing that often happens is that activity bills are lowered substantially and the HVAC system accomplishment is improved. This is a good enough accomplishment of any mechanical engineer specializing in activity and HVAC.
The opinion on this page will back up homeowners, building owners and building operators make informed decisions nearly existing HVAC systems or higher upgrades.
Operation and Maintenance
The first step to reach activity and HVAC system optimization is load reduction. This step normally consists of a long range plan which itemizes the undertakings to be taken based on best recompense on investment. Reducing your building load allows the existing HVAC system to accomplishment more efficiently. If a supplementary system or systems are innate considered, it will be more cost working to design for the abbreviated load as opposed to the existing load. A few common load dwindling strategies include:
Tighten the building shell and mount up supplementary insulation. accumulation 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 on some buildings that nevertheless have single pane windows. The installation of double pane windows later than a thermal fracture is a great recompense on investment. make certain they are activity STAR qualified windows. Tinting or Low-E coatings will even be better.
Upgrading lighting systems. The average advertisement 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 approaching any efforts in this doling out will subjugate 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 condense activity and HVAC costs. Energy-efficient lighting systems emit less heat into conditioned appearance than older afire technology. If you have a recompense freshen plenum on the other hand of recompense freshen ductwork, judge buoyant 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 collector different will condense the sensible heat get in the space. Items to judge add together copy machines, kitchen equipment, computers and refrigerators.
Control airing by having your outdoor freshen balanced. Most building owners have drawings of the original HVAC system installation. Have the drawings reviewed by a mechanical engineer to encourage your outdoor freshen flow rates conform to the latest code requirements. If no drawings are available, your mechanical engineer should nevertheless be skilled to make recommendations for improvement.
Addressing these items is your first step to reducing activity and HVAC costs.
The second step to reach activity and HVAC system optimization is knowing your system. Your HVAC system is critical to your interior environment, but it after that represents a large component of your foster 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 become old to start planning for an rearrange to supplementary equipment. with ease maintained residential systems have a activity expectancy of nearly 15 years or as a result but seem to fail at the worse times. Have a replacement plan 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 advertisement 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 vary 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, as a result any efforts in the doling out of increased efficiency is a plus.
HVAC System Tips:
Find a qualified consultant you trust. If you are a home owner or small advertisement building owner, locate a good HVAC company or mechanic to examine and preserve your system. If you are a large advertisement building owner, locate a advertisement HVAC company for normal money and a good mechanical engineer for specific guidance. I do not recommend using a mechanical engineer employed by the HVAC Company; locate a third party engineer for futuristic information.
Verify your HVAC system load. home owners should use ACCA's directory J toting up method and every others should have a load conducted by a mechanical engineer. advertisement buildings have more requirements united to code conformance, minimum airing 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 with ease as accomplishment it. acquire the load and the equipment selection right the first time.
Purchase high efficiency or activity Star equipment. Many of the supplementary systems add together bendable readiness drives for fans and compressors. higher than the years of ownership this will be paid back up many become old over. Compare good enough efficiency equipment to high efficiency equipment in terms of initial cost and activity cycle costs. Any good HVAC company or mechanical engineer can buy this information.
Consider some form of activity 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, as a result extracting some of the activity back exhausting it should be a priority.
For large advertisement buildings, judge conditioning the outdoor freshen later than a dedicated outdoor freshen unit. This will eliminate any problems united to humidity run in most instances. It will after that deposit occupant comfort and allow for supplementary downsizing of equipment.
Commercial buildings should judge economizers on their equipment. Most current codes require economizers on equipment higher than 15 tons in size. Often reachable at a low incremental cost, these units charm in buoyant freshen from the outdoor later than the temperature (sometimes humidity) outdoor is subjugate than the temperature inside.
Home owners and small advertisement building owners should install programmable thermostats. advertisement building owners should install a refer Digital run (DDC) system. The investment in either of these will pay back up more than the cost in a small amount of time. admission more below.
The third step to reach 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 advertisement building owner is a programmable thermostat. These are simple to use and incorporate strategies based on become old scheduling. Most manufacturers manage to pay for 7 day programs and setback/setup programs which will incline the HVAC system on and off to compliment your schedule and desired indoor temperature. This is a great pretension to ensure HVAC systems are used forlorn later than necessary.
DDC Systems-For the large advertisement building, I judge this as a must have system. Installation costs have steadily decreased and the accomplishment 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 airing control. The best allowance of these systems is their triumph to be scaled occurring to the largest of advertisement applications. This means you can install a simple system and mount up more controls higher to incorporate your total HVAC system. Again, the payback is gruff and with ease worth the investment.
Operation and Maintenance
The fourth and last step to reach activity and HVAC system optimization is operation and maintenance. The most efficient HVAC systems are with ease maintained. Ensure reliability, efficiency and a long activity for your HVAC system by later than these tips.
Find a qualified consultant you trust. If you are a home owner or small advertisement building owner, locate a good HVAC company or mechanic to examine and preserve your system. If you are a large advertisement building owner, locate a advertisement HVAC company for normal maintenance. make certain you collection and document every servicing later than dates, become old and names of the servicing person.
Home owners should always acquire a seasonal tune up. The operation of your system will vary later than the seasons of the year.
Replace your freshen filters regularly. Don't use whatever less later a MERV 5 filter to assure dust and fibers are removed. clean filters will keep aficionado energy.
Coil Cleaning-This is always a huge item overlooked by residential and advertisement building owners. Condenser coils total dirt and debris on their surfaces because they are outside. This makes the compressor accomplishment harder and results in a higher refrigerant temperature in your refrigeration system. Evaporator and heating coils total dust and fibers that appearance inside your home or building. clean them at least later than a year