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NORA Oilheat Technicians Manual

16-16 Energy Conservation off long enough for water or heat pipes in outside walls to freeze up. Additionally, if the setback is too great, it will take a long time to get the home back up to a comfortable temperature. This may require more energy than you saved by setting the temperature back. A maximum of five degree setback is recommended. Combining equipment modifications It is difficult to estimate fuel savings when more than one modification is applied to the same heating system. The expected savings cannot be determined by simply adding together the savings for each individual modification as more than one of them may address the same losses. The most economical first cost retrofit is the one that saves the most fuel for the lowest cost. Steps for advising your customer • Measure combustion efficiency • Inspect the heating system • Evaluate primary equipment upgrades • Recommend secondary energy saving options • Present recommendations to customer Today’s heating equipment is greatly improved over the old equipment. Replacing an old inefficient oversized boiler or furnace is one of the best investments our customers can make. Where else can they get over a 20% tax free return on investment; abundant hot water; a more comfortable, cleaner, quieter home; help improve the environment; If there is a significant bout of severe cold weather, customers using setbacks may not be able to get the house back to a comfortable temperature. Having customers not use the setback or switch to manual in extreme cold is a good idea. gradual efficiency loss. The combustion tests give a sound basis for recommending various efficiency modifications. New equipment sales should be recommended once the efficiency is determined to be below standard. Expected energy savings Typical savings from a tune-up are about 3% for systems that are regularly adjusted. If a heating system has been infrequently tuned or is out of adjustment due to equipment malfunction, then the fuel savings will be higher. For example, the efficiency of a boiler or furnace with a partially plugged fuel nozzle and sooted heating surfaces can be improved by 10% or more after a tune-up. Thermostat set-back The thermostat is the single best device homeowners can use for energy conservation. The greater the difference between indoor and outdoor temperatures, the more energy it takes to maintain it. For every degree you lower the thermostat setting, up to 3% can be saved on the heating bill. It is possible to save some energy by lowering the thermostat setting if the building is empty for long periods during the day and again at night when all the occupants are sleeping. Set back thermostats are available that do this automatically. If the set back is too great in sub-freezing conditions, the heating system may be shut Chapter 16 Energy Conservation


NORA Oilheat Technicians Manual
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