Automatic Burner Modulation Boilers Clovis NM
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Santa Fe, NM
Angel Fire, NM
Automatic Burner Modulation Boilers
This boiler uses automatic burner modulation ranging from 57 percent to full fire, preventing short cycling.
In order to ensure high enough temperatures in the masonry chimney, outlet exhaust-gas temperatures at the furnaces were higher, to compensate for any cooling effect. Condensate, produced at the rate of roughly 1 gallon per 100,000 BTUs burned, is acidic and will attack bare metal and erode masonry products. The lower-efficiency furnaces sold today ride the edge of that condensation borderline temperature range and often require careful consideration of an internal chimney liner to prevent condensation. Stainless-steel flue piping and several high-temperature plastics were introduced as efficiencies crept toward 90 percent, and chimneys were abandoned in favor of directly exhausting the flue gases to the exterior. We quickly discovered that pool chemicals and other household cleaning products - agents with chlorine are especially bad - give off gases that can have disastrous effects on system components if they are stored in areas where combustion air moves toward the furnace (or boiler). When combined with carbon-based fuels, they form hydrochloric acid. New home construction became so tight that fresh air had to be brought in for combustion in what is called direct venting (both supply and exhaust air are piped to the exterior). Indirect venting applies to those systems where only the exhaust is piped to the exterior. Some of these earlier forays into venting technologies still haunt us. For more information, visit www.cpsc.gov/cpscpub/prerel/prhtml01/01069.html. It wasn't until the 90 percent efficiency barrier was broken that flue-gas temperatures began to fall to a range best suited for standard low-temperature plastic piping.
This was also the time when electronic ignition, both spark and glow-bar, began to replace the old reliable thermocouples. Standardization of component parts virtually disappeared, which has greatly complicated inventory and service issues. Our tools began to change, too, as we adapted to emerging technologies. No longer were simple hand tools and a flashlight sufficient for diagnostic work. Electric voltmeters and ohmmeters became commonplace, along with sensitive combustion analysis gas detectors and seminars concerning proper diagnostic techniques. Technicians have had to become educated in high-tech appliances as well as staying abreast of U.S. Environmental Protection Agency regulations and - if they want to handle refrigerants - obtain an EPA license certification. As manufactures have achieved higher furnace efficiencies, they've led the way with advanced printed circuit boards that act as the brains for managing all of the internal components. Today it's common to see efficiencies between 92 and 98 percent! Variable-speed or stepped speeds for blower airflow is being combined with staged or variable combustion inputs. This squeezes out every BTU the energy source can provide, while enhancing your comfort level. The cost between the high-efficiency systems and the old standard efficiencies of 80 to 87 percent (considered high-efficiency just a few decades ago), have narrowed to the point where we now sell many more high-efficiency appliances. Smart homeowners have become acclimated to viewing the increased cost more as a return on an investment -- often with better performance than the stock market! So it's no surprise that flue-gas venting requirements have become much more complicated and precise. Lengths of exhaust-piping runs, associated friction losses for fittings, and allowances for wind and snow accumulation must be taken into consideration.
Building and home inspectors have had to jump in with both feet to keep up with the changes. The production of acidic condensate also presents a new twist and one that sometimes sees shortcuts, such as simply drilling a hole through the concrete floor to dump this fluid into the stone bed below the slab. Special pumps capable of lifting the condensate to a suitable drain, such as the laundry trap, are inexpensive and capable of handling the lower pH of the fluid. Some local codes require the inclusion of a buffering container to neutralize the acidic fluid prior to being introduced into a sanitary sewer line. For climates with subfreezing temperatures, pumping to an exterior location is not recommended. We're seeing the beginning of another technology revolution as equipment becomes smart and self-diagnostic, too. Today, PC boards often include lights that flash diagnostic codes, aiding the technician. I believe we'll soon see a constant stream of innovations. Reliable flue-gas sensors will allow continuous analysis and adjustment for peak use of fuel while maintaining the lowest concentrations of nitrogen oxides to minimize airborne pollution. We'll be able to dial in and monitor the equipment's performance before a technician is dispatched. That way, there will be no guesswork about which parts will be needed. Equipment will detect problems and call for service entirely on their own! Advancements will enable self-monitoring equipment to predict problems before they occur, eliminating middle-of-the-night or weekend service calls. Wireless sensors will provide feedback to the heating equipment's brain for an infinite variety of personal preferences based on things such as voice recognition or infrared signatures that designate who is where within the conditioned space. Computers will use outdoor and indoor sensors to compute the number of BTUs needed at any given moment to offset the heat loss of the structure. This will enable the equipment to run at lower speeds, more quietly and at peak efficiencies. Many have long considered these advancements impossible, but I think they're just around the corner. Dave Yates is a master plumber and owns the PHVAC firm F.W. Behler in York, Pa. He can be reached at 717-843-4920 or firstname.lastname@example.org.