high efficiency boiler flue

BOILER EFFICIENCY GUIDE - Cleaver-Brooks

Even with economical fuel costs, the selection of a high efficiency boiler will result in substantial cost savings. A boiler installation costing $150,000 can easily consume over $1,000,000 in fuel every year at today’s energy rates. Future energy rates are sure to be much higher.

High Efficiency Boilers - furnacecompare.com

Nov 01, 2019 · High efficiency boilers, which have an annual fuel utilization efficiency (AFUE) of 90% and above, use condensing technology. These boilers work by recovering heat from the flue gases that simply exit a house from the flue of a conventional non-condensing boiler.

Venting a condensing boiler through chimney? — Heating Help

The chimney has two flues. One flue is devoted to a wood burning stove. The other flue currently supports a boiler and a FHA furnace. The old boiler will be replaced with the new high-effieciency boiler, and the FHA furnace will be replaced with an air handler connected to the new boiler.

Venting high-efficiency boilers into masonry chimneys - Fine

The high-efficiency appliance has wrung so much energy out of the flue gases that they are near their dew point by the time they are discharged into the chimney. When the gases hit the cool masonry, condensation forms on the inside of the chimney.

High CO readings from old Oil Boiler.Should I be worried?

High CO readings from old Oil Boiler.Should I be worried? I had my (1400s sq ft; 2 floor) house reviewed for energy efficiency recently. The guy stuck a probe in the flue of my oil boiler and gas water heater.

Is PVC an acceptable vent material for flue gases?

Mar 15, 2014 · Then PVC, CPVC and polypropylene flue gas piping can be safely used on high efficiency boilers and water heaters. This would be an answer to the dilemma of cost versus safety. Without a standard for proper use of these safety devices in combination with plastic flue gas piping or without the use of stainless steel flues, plastic flue materials

High-Efficiency Boiler | Wall Mounted Boiler | Mascot FT

The High Efficiency Mascot FT (Fire Tube) Boiler The Mascot FT is a cascadable high-efficiency wall mounted boiler that easily satisfies the space heating needs of the modern home. Powering the Mascot FT is an advanced fire tube heat exchanger that uses the latest in heating tube technology to deliver quick heating response, exceptional efficiency, and years of reliable service.

Is PVC an acceptable vent material for flue gases?

Mar 15, 2014 · A temperature sensor or probe with a high-limit control could be inserted into the flue at the flue connection to the boiler or water heater. This control would shut off the burner if the flue gas temperature exceeds the temperature rating of the flue pipe.

Neutralizing Condensate in Condensing Boilers and Hot Water

High efficiency condensing boilers and hot water heaters extract additional BTUs form the water vapor in the flue gas. When the gas drops below 130°F, it starts to condense and produces an acidic liquid which has the potential to cause damage to your piping, drains and other system components.

ENERGY STAR Most Efficient 2019 — Boilers | Products | ENERGY

The Peerless® PUREFIRE® Series gas-fired condensing boiler from PB Heat, LLC is a high-efficiency 95% AFUE boiler for residential applications and is available for either natural or LP gas systems. The direct vent, sealed combustion boiler features a fully modulating, stainless steel burner and is environmentally friendly with LoNox operation.

Combustion Efficiency and Excess Air - Engineering ToolBox

Carbon dioxide - CO 2 - is a combustion product and the content of CO 2 in a flue gas is an important indication of the combustion efficiency. Optimal content of carbon dioxide - CO 2 - after combustion is approximately 10% for natural gas and approximately 13% for lighter oils.

Creek XL High Efficiency Condensing Boiler | Superior Boiler

Superior Boiler would like to introduce a product that will change the way our industry sees condensing boiler technology. The heart of the Creek XL is a robust titanium infused stainless steel heat exchanger – the key to its high efficiency.

Flue Condensation Problems Why | Gas Heating Safety 101

Flue condensation problems, if left alone, can cause the flue duct to rot and vent hot gases in an area where it could be hazardous to the occupants of the building. Furthermore, there is carbon monoxide present in these gases, and carbon monoxide is very dangerous.

Flue Gas Temperatures and PVC Venting - Cause for Concern

The high temperature of flue gases is a major concern to me due to the fact that Schedule 40 PVC pipe and fittings are only rated for 140 degrees Fahrenheit. I think we, in New England, are going to see PVC failures in the near future, directly related to the high flue gas temperatures of the new high-efficiency boilers.

Venting a high-efficiency boiler - Forum Archive | Brownstoner

Dec 19, 2010 · We’ve installed a mod/con boiler. The specs say it can be vented directly through the back wall, and in fact this is the preferred method over venting through chimney. But neighbor objects to the “smoke” (water vapor) blowing into her yard — it’s at least 15 feet from her windows and door

Myths and methods for protecting boilers against flue gas

Nov 27, 2017 · A thermodynamic balance between the boiler and distribution system is achieved, and boiler inlet temperature is high enough to avoid flue gas condensation. The key to the successful strategy shown in Figure 4 is a mixing assembly that senses and reacts to boiler inlet temperature. This detail was lacking in the systems shown in Figures 2 and 3.

Boiler Combustion | CleanBoiler.org

The efficiency loss due to the lower flame temperatures can be partially offset by utilizing external components, such as an economizer. Or, the offset technique can be inherent in the NOx design. One technology that offsets the efficiency loss due to lower flame temperatures in a firetube boiler is flue gas recirculation.

Gas Boiler Flue Regulations: Things to Know before

If you are using a high efficiency boiler model, make sure that the flues should have more plumbing to them than in case with older boilers. Never place the flue outlet under the windows, opposite property walls, near doors and close to the neighbor’s boundaries.

High Efficiency Condensing Boilers | Superior Boiler

The Creek condensing boiler can be used as a high efficiency heating boiler. The heart of the Creek condensing boiler is a robust titanium infused stainless steel heat exchanger – the key to its high efficiency. This design allows the boiler to withstand the corrosiveness of condensed flue gases for years of reliable operation.

High Efficiency & Condensing Heating Boilers & Furnaces

High efficiency & condensing heating boilers guide: Here we explain the installation, operation & maintenance as well as defect inspections for high efficiency oil and gas fired heating boilers & furnaces, condensing boilers, and similar energy-saving equipment. We discuss: how to inspect a high efficiency heating boiler or furnace.

AL294C Chimney Liners for High Efficiency Boilers, Furnaces

When there are heating appliances that are rated at 86% efficiency or higher, it is a good idea to use AL29-4C. This flue liner provides better corrosion resistance to condensed flue acids that are formed using this type of appliance. AL29-4C These .006 chimney liners are intended for use with HIGH EFFICIENCY GAS, OIL, and CORN burning appliances.

Is a high efficiency, condensing gas boiler the best choice

Aug 13, 2018 · A high efficiency, gas-fired condensing boiler is one of the most economical and clean ways to heat your home, reduce your monthly heating bills, and lessen environmental impact. In most circumstances, a condensing boiler can be used to replace an existing boiler in an older heating system.

How High Efficiency Condensing Gas Boilers Work

May 15, 2014 · In a high efficiency boiler, the flue gases are usually around 135°F and efficiencies of 95% or greater can be achieved. This difference in flue temperature is where high efficiency boilers get part of their extra efficiency; extracting more heat from combustion out of the flue gases and putting it into the hydronic system.

High Efficiency Condensing Boilers: The Benefits

Modern boilers are more efficient because they are condensing boilers. A condensing boiler has a much larger heat exchanger. The heat exchanger is designed to extract over 90% of the wasted heat from the fuel it burns which would normally be lost to the atmosphere through the flue, and recycles it back into the heating system.

Furnaces and Boilers | Department of Energy

Energy efficiency upgrades and a new high-efficiency heating system can often cut your fuel bills and your furnace's pollution output in half. Upgrading your furnace or boiler from 56% to 90% efficiency in an average cold-climate house will save 1.5 tons of carbon dioxide emissions each year if you heat with gas, or 2.5 tons if you heat with oil.

Protecting Boilers Against Flue Gas Condensation | 2017-08-14

Aug 14, 2017 · A thermodynamic balance between the boiler and distribution system is achieved, and the boiler inlet temperature is high enough to avoid flue gas condensation. The key to the successful strategy shown in Figure 4 is a mixing assembly that senses and reacts to boiler inlet temperature. This detail was lacking in the systems shown in Figures 2 and 3.

is high efficiency gas boiler worth the investment? what's

A high efficiency gas boiler (>90%) must have the flue gas condense in order to achieve that efficiency. The flue gas will only condense when the return water temperature is 120 degrees or less. An ordinary system has return water temperature much higher than this, because this is the temperature for which your radiators are sized (typically 180 supply, 160 return).

Condensing High Efficiency Gas-Fired Boilers and Water Heaters

IE2 high efficiency gas-fired boilers and water heaters utilize state-of-the-art Radial Variable Circulation (RVC) stainless steel heat exchangers for maximum heat transfer and operating efficiencies of up to 98%. Using all of today’s modern technologies including pre-mix burners, modulating firing rates of up to 20:1 and integrated

High Efficiency Commercial Boiler | Commercial Condensing

High Efficiency Commercial Modulating, Condensing Boiler and Volume Water Heater. Boiler Indoor Sizes: 285 to 850 MBH Volume Water Indoor Sizes: 150 to 850 MBH.

Condensing vs. Non-Condensing

High Efficiency •Must be vented according to manufacturer’s instructions. •Most likely require PVC •Can be direct-vent or fan-assisted draft •Can be through wall •Sealed Combustion chamber •Utilize second heat exchanger to extract heat from flue gas •Lower temp flue gas •Condensing •Many fan/burner controls •Consume less fuel

Combustion Efficiency and Excess Air - Engineering ToolBox

Example - Oil Combustion and Heat Loss in the Flue Gas. If. the temperature difference between the flue gas leaving a boiler and the ambient supply temperature is 300 o C, and; the carbon dioxide measured in the flue gas is 10% - then, from the diagram above. the flue gas loss can be estimated to approximately 16%.

KN30 - KN Series - High Efficiency Condensing Gas-Fired Boilers

KN Series by Advanced Thermal Hydronics are the only high-efficiency, cast iron boilers available for the commercial marketplace that combine the efficiency of condensing, gas-fired technology with the strength, durability and heat retention of cast iron construction.

High Efficiency Water Boilers - Power Burner Fired | Rite

High Efficiency Water Boilers 83% Efficiency Power Burner Fired Rite Power Burner Fired Watertube Boilers are found at the heart of better engineered closed-loop heating systems all over North America.

HIGH EFFICIENCY CONDENSING GAS BOILER

This boiler is equipped with a pressure switch in the event of a blocked vent the boiler will lockout. No attempt by the user/owner may be made to put the boiler back into operation. A qualified service technician must be notified of the issue. The boiler may only be reset by a qualified service technician after they have diagnosed and corrected

What Does It Mean When White Smoke Comes Out of My - Hunker

If your home uses a high-efficiency boiler, condensation will be present in your chimney or flue system the majority of the time the boiler is in operation. The construction of the chimney and flue in your home must be sufficient to withstand the almost constant presence of water vapor.

High-efficiency condensing boilers | A.O. Smith

These boilers have a very low gas usage, very low emissions, Nox class 5 and very high efficiencies, up to 110.3%. In short, the Upsilon is the best solution available for large commercial applications. Features Upsilon. Efficiency 110.3% according EN 677 (50/30°C part load, Hi) Fitted with 1 or 2 stainless steel heat exchangers

Venting high-efficiency boilers into masonry chimneys - Fine

Mark Eatherton, a plumbing and heating contractor in Denver, Colorado, replies: The introduction of flue gases from a high-efficiency boiler or furnace into a conventional masonry chimney is a guarantee for chimney failure. The high-efficiency appliance has wrung so much energy out of the flue gases that they are near their dew point by the

Improve Your Boiler’s Combustion Efficiency

measurements indicate an excess air level of 44.9% with a flue gas minus combustion air temperature of 400°F. From the table, the boiler combustion efficiency is 78.2% (E1). Tuning the boiler reduces the excess air to 9.5% with a flue gas minus combustion air temperature of 300°F. The boiler combustion efficiency increases to 83.1% (E2).

is high efficiency gas boiler worth the investment? what's

A high efficiency gas boiler (>90%) must have the flue gas condense in order to achieve that efficiency. The flue gas will only condense when the return water temperature is 120 degrees or less. An ordinary system has return water temperature much higher than this, because this is the temperature for which your radiators are sized (typically

High–Efficiency Boilers | The ASHI Reporter | Inspection News

High-efficiency boilers are not as common as high-efficiency furnaces, however. High-efficiency boilers can cost twice the price of regular boilers, whereas high-efficiency furnaces cost only 30% to 40% more than lower-efficiency systems. There are fewer manufacturers of high-efficiency boiler equipment.