What type of flue does a boiler have?
This is commonly referred to as a horizontal flue. In some cases, where building types and shapes differ, you may have a vertical flue which exits through the roof of your property. Most modern boilers, under 15 years old will have a round flue (pipe), with boilers older than that often having a square flue.
Are all boiler flues the same?
Does Every Boiler Have a Flue? Regular, combi and system boilers are all fitted with flues. In fact, the only type of boiler which doesn’t have a flue is a back boiler, which used to be situated behind fireplaces.
Where should a boiler flue be placed?
The boiler flue terminal should be positioned away from doors, windows or other openings. There should be a space of at least 300mm above, below or to the side of any opening. Harmful gases should be properly expelled from the property, so they cannot re-enter.
What are the regulations for a boiler flue?
What are the regulations around boiler flue?
- 300mm away from an opening window or air vent.
- 25mm below guttering, drain pipes or soil pipes.
- 300mm above ground, roof or balcony level.
- 2,000mm below a Velux window.
- 1,200mm from an opening, such as a door or window, into the home.
Can I use existing flue with new boiler?
Yes, you do need to replace the flue when replacing any boiler even if the same brand. This is to keep it in line with manufacturers specifications and Building regulations. The washers on the combustion side of the flue (inner section) perish over time and can leak and cause damage to the rest of the flue.
How close can a boiler flue be to another house?
Flue position Depending on the size of the boiler, the flue must be positioned a certain distance from the nearest window, door, or air brick. Typically this is around 30-60cm if it’s to the side or above the opening, and a bit more if it’s below.
What is the difference between a conventional flue and a balanced flue?
Unlike a conventional flue, a balanced flue allows air to enter from outside to supply the appliance with oxygen. In the case of a gas condensing boiler, the balanced flue contains two tubes: one tube lets oxygen in, the other tube lets waste gases out.
How long does it take to replace a boiler flue?
Due to the extra work involved in moving your boiler, such as repiping and installing a new flue, this can take around half a day on top of the time it costs to remove your old boiler and install the new one.
Can boiler flue go over boundary?
If the flue is within 60cm or so of the boundary line of the property, it could have health and safety implications for anyone walking past, so would not be allowed.
How far does a boiler flue have to be from a boundary?
A flue that is directed towards your neighbour’s boundary must be 600mm from the boundary and 2m from a door or window in your neighbour’s home. Horizontal flues for condensing boilers must rise slightly in order for the acid water vapour to trickle back down the flue and be safely removed via the condense pipe.
What happens if a boiler flue is blocked?
If your boiler’s flue becomes blocked, these gases have nowhere to go other than back inside your home. In some cases, this can be fatal, with the NHS stating that around 60 deaths a year are caused by carbon monoxide poisoning. The two main gases your gas condensing boiler produces are water vapour and carbon dioxide.
How do I know what type of gas flue I have?
The best clue to knowing what type of flue you have is by simply looking at your roof and seeing what kind of outlet it has. Most of our gas fires are class 1, class 2 and precast suitable, however in the case of our wall mounted fires the requirements vary.
Can you use existing flue with new boiler?
Can two boilers share the same flue?
Yes, with some provisions and restrictions an oil and a gas fired heating appliance may be vented into the same chimney flue. In some jurisdictions an oil fired heater and a gas fired heating appliance, such as an oil fired heating boiler and a gas fired water heater may be permitted to share the same flue provided.
How to flush boiler?
Increase performance by removing sludge build up
Short-term exposure symptoms include:
What boiler should I buy?
You should buy one that is sealed combustion because it brings outside air into the burner and directs exhaust gases outside. Non-sealed combustion boilers draw heated air in and then send it up the chimney, wasting the energy used to heat the air.