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Chimney Flue Requirements, Furnace and Water Heater

When upgrading to, or having a high efficiency furnace installed, exhaust gases will be discharged through the PVC pipe, and not the chimney flue. There are two types of venting associated with those furnaces single pipe and two pipe systems.

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The Word: Venting Gas Appliances Using a Chimney | The

The Word's subject this month is venting gas appliances using a chimney. The Word finds this subject interesting because this is a common situation in some areas and because inspectors may find this subject confusing. Remember when reading all The Word columns that

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Can you install a high-efficiency furnace with only one

And now the rest of the story. High-efficiency furnaces come with two pipes; one pipe brings combustion air directly into the furnace and mixes it with fuel. The other pipe exhausts the combustion gases directly to the outdoors. Both of these pipes are directed to the outdoors at about 95% of the furnaces that I inspect in Minnesota.

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Venting high-efficiency boilers into masonry chimneys

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.

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Venting high-efficiency boilers into masonry chimneys

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.

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Exhaust and intake for a high efficiency gas boiler

Oct 18, 2007· We just had a high efficiency gas boiler installed in our 3-story rowhouse. Our heating contractors ran two PVC pipes into our lined flue. One of them continues all the way up to the roof and out the chimney; the other stops just inside the flue, on the cellar level. Were not sure which of the two pipes is the air intake and which is the exhaust.

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Flue Condensation Problems - HVAC Heating & Cooling

Flue Condensation Problems - This picture shows a furnace flue with condensation problems. Flue condensation problems are caused by hot gases cooling too quickly in the flue. As the hot gasses, cool moisture in the gases condenses and start dripping back down the flue.

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Venting a high-efficiency boiler - Forum Archive |

Dec 21, 2010· The most critical issue for these is having the exhaust and intake in the same (proximate) place, such that pressure differences dont influence the boiler (ours is 299k BTU, and uses 4 inch PVC for both inlet and outlet, and they go to the roof, through the entry and the corners of the upper floors.

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Back to Basics: Venting for Gas-Fired Boilers | 2003-06-04

Jun 04, 2003· As the efficiency of a boiler goes up, the temperature of the flue gases go down, and the gases are more likely to condense in the flue. When combustion efficiency exceeds approximately 83%, there is a good possibility that the flue products will condense.

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HighEfficiency Boilers | The ASHI Reporter | Inspection

Low Operating Costs. The operating costs of high-efficiency boilers are considerably lower than conventional boilers. Seasonal efficiencies in the range of 85% to 95% are possible. The seasonal efficiency of conventional boilers may be 55% to 65%.

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Venting a high-efficiency boiler - Forum Archive | Brownstoner

Dec 21, 2010· The most critical issue for these is having the exhaust and intake in the same (proximate) place, such that pressure differences dont influence the boiler (ours is 299k BTU, and uses 4 inch PVC for both inlet and outlet, and they go to the roof, through the entry and the corners of the upper floors.

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Boilers Focus on Energy

Focus on Energy recommends buying a boiler with annual fuel utilization efficiency (AFUE) rating of 90% or greater. The higher the AFUE of a boiler, the more efficient it is. Also look for a boiler that modulates the heat output and with an outdoor temperature reset to maximize comfort and efficiency.

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Lochinvar Products - Commercial Boilers class

Balanced Flue Direct Vent: Sun Saver Solar: Commercial Boilers. Indirect Plate and Frame Commercial Water Heater: FTXL Fire Tube Boiler: Models from 399,999 to 850,000 Btu/hr and best-in-class AHRI Thermal Efficiency: Knight XL: High Efficiency Commercial Condensing Boiler: Outdoor Knight Boiler:

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Condensing - MG-Flues

Condensing. The single flue system is available in 60200 and the flexible system is available in 60130. Therefore they are suitable for small to extremely large condensing appliances of 5 to 500 kilowatt. The concentric product is available in 60100, 60130 and 60200 for optimal safety.

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Venting High Efficiency Furnace Through Roof - Forced Air

Dec 08, 2015· Todays high efficiency gas appliances have lower temperature flue gases and must use forced efficiency furnace vented through the roof mostly moisture. 2 The Canadian Standards Association When venting through the roof. Bryant introduced the first high-efficiency condensing gas furnace in the early 1980s.

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Install a Vent Flue for a 95% Efficient Condensing Gas

Dec 27, 2013· Install a Vent Flue for a 95% Efficient Condensing Gas Furnace DIY Posted on December 27, 2013 by Robert Disclaimer: If youre considering doing this type of job yourself, you should be aware of the dangers involved.

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I have a high efficiency furnace that uses PVC as a flue

Feb 02, 2009· I have a high efficiency furnace that uses PVC as a flue exhaust. The exhaust runs vertically through the roof, and at about 20 inches above the roof it terminates in a 135 degree PVC gooseneck. All of which is fine 9 months out of the year. I live

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4 Things You Need to Know About High-Efficiency Furnace

A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace. A high-efficiency furnace uses a different type of venting system because it extracts the heat that remains in those combustion gases before venting

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Is a high efficiency, condensing gas boiler the best

Aug 13, 2018· The biggest difference between condensing boilers and conventional, non-condensing boilers is efficiency. The most efficient boilers keep heat in the house rather than letting it escape through the chimney or vent pipe. An ultra-high efficiency boiler is able to keep more heat in the heating system, but the side effect is condensation.

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Venting High Efficiency Furnace Through Roof - Forced Air

Dec 08, 2015· Todays high efficiency gas appliances have lower temperature flue gases and must use forced efficiency furnace vented through the roof mostly moisture. 2 The Canadian Standards Association When venting through the roof. Bryant introduced the first high-efficiency condensing gas furnace in the early 1980s.

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