high efficiency boiler flue through roof

4 Things You Need to Know About High Efficiency Furnace Venting

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 the resultant mixture of water and carbon dioxide.

Fundamentals of Venting and Ventilation

On the other hand, the higher the efficiency of a furnace, the lower the flue-gas temperature. Two cases which can cause poor venting are the oversizing of the vent or reducing the BTUH input to an existing vent system. Either case will result in excessive cooling of the flue gases and a reduction of the vent forces.

Flue exit through pitched roof | DIYnot Forums

Horizontal flues are usually more reliable as few people seem to be able to properly seal a vertical flue. It must tip back towards the boiler by 3° apart from the terminal length which can be horizontal or tip back. The prices you are quoting seem pretty high and lower prices may be possible.

Guide to Side Wall Vent Chimneys & Flues - Direct-Venting

In comparing the venting of exhaust gases from a high efficiency furnace, boiler or water heater with the venting of exhaust gases from a conventional heating system it will be immediately obvious that the high efficiency equipment exhaust is produced at a low-enough temperature that it is vented through comparably small-diameter plastic piping rather than a cooled, fire-protected metal heating vent.

High Efficiency Boiler Flue Through Roof

High efficiency natural gas boilers cannot use a conventional metal chimney to vent flue gases from the home. Instead, they use an approved plastic venting system to vent the lower temperature flue gases outside through the side wall or roof. The AFUE rating for a high efficiency boiler is approximately 90%. It is estimated that you can reduce

Gas Flue in conservatory | DIYnot Forums

Feb 13, 2016 · Nevertheless, I still wouldn't advise using your boiler any more. There are Vokera flues available, but different flues are designed to fit different models and aren't interchangeable. Trying to use a high-efficiency flue on a standard efficiency boiler will result in doom

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.

Exhaust and intake for a high efficiency gas boiler - Forum

Oct 17, 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. We're not sure which of the two pipes is the air intake and which is the exhaust.

Venting a Natural Gas Fired Boiler | This Old House

Dec 22, 2007 · Generally the SS chimney has to be in a straight line from the cellar to the roof; there is some bend allowed in the connecting flue pipe from the boiler to the chimney, as long as at least 1/4" upward pitch per foot is maintained. Moving the boiler to the side of the cellar where the chimney will go up to the roof is the most practical.

horizontal multistage hot water boiler flue through roof

High Efficiency Hot Water Cylinders 2G Products Centrifugal Pumps The pump will be driven by electrical motor assembled on a common base plate with the pump through a flexible coupling Multistage Horizontal Pump made of stainless steel 2G Centrifugual- horizontal, Vertical, Boiler feed, fire water, multi stage, Rotary Screw, Recipro

What to Know About High-Efficiency Furnaces | Hunker

In many homes with mid-efficiency furnaces and gas water heaters, the furnace and the water heater share a common flue. When the switch to a high-efficiency furnace or boiler takes half of that partnership away, the flue becomes too large for the water heater, now known as an orphaned water heater, to draw properly. To correct this requires an insert into the chimney flue—an additional expense that must be taken into account when budgeting for a high-efficiency replacement to a mid

High-Efficiency Heating: In Praise of Plastic Chimneys

Sep 11, 2013 · After being preheated in the boiler’s secondary heat exchanger, the water gains its final level of heat by passing through the primary heat exchanger –the one directly exposed to the hot flames above the burner module. High-efficiency furnaces work in much the same way as high-efficiency boilers do, substituting air flow for water flow.

Can a high efficiency furnace be vented through a masonry

Re: Can a high efficiency furnace be vented through a masonry chimney? Timothy Miller Howdy, how old is the chimney? pvc is real cheap to install inside the old chimney and it will give the peace of mind that co2 is not leaking into the house from an old chimney

High Efficiency vs. Standard Furnaces | All Climate

High efficiency condensing gas furnaces differ from the standard efficiency models in several ways. The primary difference is the manner in which they are vented. Since the heat lost through the flue of a high efficiency condensing furnace is a lot less than the heat lost through the flue on a standard efficiency furnace, the steam is much

5 Things You Need to Know When Your Boiler Flue Exits Your Roof

Aug 30, 2017 · You see, if you’ve got a boiler in your attic and the flue goes through the roof, there’s a chance it could get bashed or pulled on accidentally when you’re up there. Securing any joints with brackets will help to ensure your flue can withstand people banging a suitcase or accidentally knocking it, without wobbling or coming loose.

Waste Heat Boiler Flue Through Roof

high efficiency boiler flue through roof A combination or combi boiler is both a high efficiency water heater and a central heating boiler in a single compact unit.

high efficiency furnace venting thru chimney

Re: high efficiency furnace venting thru chimney PVC Sch. 40 pipe is not approved as a venting material for CAT III or IV by the pipe mfrs. nor as a chimney liner. In fact, most mfrs. state NOT to use their pipe for combustion venting.

ENERGY STAR Most Efficient 2019 — Boilers

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.

combi flue through a flat roof | DIYnot Forums

Is it possible to have the flue of a combi boiler going through a flat roof? I am considering having one fitted, but wanted to know whether it could be reliably done without a leak. Some installers advise against it becuase they say it is tricky and prone to leaking, damaging the boiler in the process.

Condensing vs. Non-Condensing - US Department of Energy

Orphaned Water Heater. •Many homes utilize a combination venting system through a chimney where the WH & Furnace share a vent. •In existing homes where an older non-condensing Furnace is replaced by a 90+ efficiency appliance, an “Orphaned Water Heater” can occur.

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.

Direct Vent Gas Boilers: Why Choose Direct and not

Normally it has a metal flue connected to a chimney. The unit itself relies on a natural/atmospheric combustion. If you have a direct vent gas boiler, you use the appliance that is specially designed to extract a lot more heat from the same fuel quantity. So much heat is extracted that the gases are cool and can vent outside through the pipe.

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.

Plastic Vent Pipes for High-Efficiency Condensing Furnaces

But in the modern high-efficiency condensing furnaces, special plastic pipe material (most often PVC, ABS, or CPVC) is used for air intake, exhaust gas, and to carry the corrosive condensation resulting from the combustion process.

Fire Tube Steam Boiler Flue Through Roof

vertical d type boiler flue through roof. Horizontal Return Tubular Fire Tube Boiler Flue Horizontal Return Tubular Fire Tube Boiler Flue Through Roof. Related boiler knowledge. It is a little different than either a locomotive type boiler or a true horizontal return tube boiler.

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.

4 Ton Steam Boiler Flue Through Roof - meerfreiraum.de

vertical cross tube boiler flue through roof. vertical cross tube boiler flue through roof zg gas boiler. Why choosevertical cross tube boiler flue through roof producted by ZG boiler? Zhengzhou Boiler Co., Ltd. (which formerly known as Zhengzhou Boiler Factory), founded in 1945, is a joint-stock enterprise with A1, A2, C3 boiler and .

Install a Vent Flue for a 95% Efficient Condensing Gas

Dec 27, 2013 · The horizontal to vertical run of the pipe should never exceed a 1 to 3 ratio, per building code. It would be a good idea to vent that pipe up through the roof, you would have to sneak it through a wall cavity since you are coming from a basement .

Typical venting for high-efficiency wall-hung boilers

I currently have a gut/rehab underway on 3rd floor of a building. In the next phase we may be adding a high-efficiency boiler on second floor. With everything open above 2nd floor up to the roof now, it would be very easy to add vent pipe to be connected to the boiler in the future.

Waste Heat Boiler Flue Through Roof

cfb boiler flue through roof - ksmh.be. 2012-6-28·back-end flue gas cleaning equipment, and pulverized coal boilers: a single CFB boiler can burn not only different types of coal and biomass, but also various sludges and production residues. Choosing a CFB boiler also makes sense for captive power plants located near to coal mining areas.


Sheet metal transition ring on boiler flue collar is only used for chimney venting. It is not used for direct venting. The transition ring must be removed from boiler’s cast iron flue collar before installing appliance adapter onto the flue collar. Clean off any silicone residue on the flue collar before installing. VENT PIPE INSTALLATION CAUTION

High Efficiency Boiler Flue - fewo-klemme.de

high efficiency boiler flue through roof The Alde 3020 Compact high efficiency combi boiler is ideal for central heating systems in boats, motorhomes, caravans and portable cabins. It provides 8.7 kW of heat through up to 14 m of aluminium convector with 93% SEDBUK-based efficiency.

Gas Furnaces:Ventilation and Combustion Air | hvac machinery

Oct 19, 2015 · High-efficiency gas furnaces vent the gases and other byproducts of the combustion process through PVC (plastic) pipe, not the metal pipe used with standing-pilot gas furnaces. The PVC exhaust pipe extends vertically through the roof or horizontally through a sidewall to the outdoors. The latter is the typical connection to a replacement furnace.

Can you put a woodburner flue through a polycarbonate roof on

Mar 08, 2017 · The place at which you choose to put a flue through your polycarbonate roof might be influenced by the Building Regulations. For example, Document J of the regulations states that a flue must terminate at least 2.3 metres away from any window horizontally.


C&M wall-hung appliances can be fitted up to 4 metres from an outside wall using the standard horizontal flue kit. Full 360˚ rotation of the flue allows the greatest flexibility. The optional 45˚ and 90˚ bends make the system ideal for boiler changes.


On the flue vent side, a tee or exit cone (velocity cone) may be utilized in place of a rain cap for high wind or wind blocked sites. The branches of the tee can be in the horizontal or vertical direction, as determined by the system designer and site conditions.

Oil Waster Boiler Flue Through Roof

HIGH EFFICIENCY COMMERCIAL BOILERS - Lochinvar. 2015-5-18·HIGH EFFICIENCY COMMERCIAL BOILERS WITH MODBUS PROTOCOL, CASCADING SEQUENCER AND CREST allows system designers tremendous flexibility to vary the flow rate through the boiler. It can horizontally through a sidewall or vertically through the roof.

Boiler-Venting Considerations - Heating Help

The boiler flue gases could condense until the stack gets warm, causing rollout. Once the stack was warm, the draft could be very high. A good rule of thumb is that a draft control should be used if the chimney is over 30 feet high. The draft control may range from a barometric damper to a sequencing draft control.

vertical tubeless boiler flue through roof

Vertical Flue system which allows the flue to pass through a flat roof and terminate at a maximum height of 980mm (38in) measured from the top of boiler case.