new boiler advice

Belenus

propertyrental said:

Thanks everyone. An interesting and useful range of options, that will help me in discussions with the contractors I get round.

Just to clarify- no, there's no adjacent bathroom though there is a loo below - not directly but offset to one side. Will discuss piping condensate down instead of up!

I apologise if I am wrong but you may be confusing two different things?

Boilers need a flue to discharge the exhaust gases. Older boilers were not room sealed. They got the air for combustion from the room or space they were in and had a single pipe flue to discharge the exhaust gases. They had to be installed in well ventilated rooms or areas.

Modern domestic boilers are room sealed and have a two pipe balanced flue system, one for incoming air and one for outgoing exhaust gases. This means that there is no link or interaction between the air in the house and the air used by the boiler. Ventilation is much less of a problem but the boiler still should have some ventilation to dissipate heat.

Flues normally run from above the boiler to the outside, either through a wall or through a roof.

Older boilers were non condensing and did not have to deal with condensate. Modern condensing boilers produce a slightly acidic liquid condensate and that needs to be drained from the boiler. This can be done by discharging the condensate via gravity into the internal drains in a house for baths, showers, basins etc or via a pipe leading to the outside and draining to a soakaway outside the house.

A condensate pump can be used for boilers located in basements etc where gravity will not carry the condensate outside.

As your boiler is in the first floor it is likely that your installer can find a way of linking the condensate drain to your internal plumbing or to the outside without needing a pump.

plumb1_2

Belenus said:

propertyrental said:

Thanks everyone. An interesting and useful range of options, that will help me in discussions with the contractors I get round.

Just to clarify- no, there's no adjacent bathroom though there is a loo below - not directly but offset to one side. Will discuss piping condensate down instead of up!

I apologise if I am wrong but you may be confusing two different things?

Boilers need a flue to discharge the exhaust gases. Older boilers were not room sealed. They got the air for combustion from the room or space they were in and had a single pipe flue to discharge the exhaust gases. They had to be installed in well ventilated rooms or areas.

Modern domestic boilers are room sealed and have a two pipe balanced flue system, one for incoming air and one for outgoing exhaust gases. This means that there is no link or interaction between the air in the house and the air used by the boiler. Ventilation is much less of a problem but the boiler still should have some ventilation to dissipate heat.

Flues normally run from above the boiler to the outside, either through a wall or through a roof.

Older boilers were non condensing and did not have to deal with condensate. Modern condensing boilers produce a slightly acidic liquid condensate and that needs to be drained from the boiler. This can be done by discharging the condensate via gravity into the internal drains in a house for baths, showers, basins etc or via a pipe leading to the outside and draining to a soakaway outside the house.

A condensate pump can be used for boilers located in basements etc where gravity will not carry the condensate outside.

As your boiler is in the first floor it is likely that your installer can find a way of linking the condensate drain to your internal plumbing or to the outside without needing a pump.

Lots of Older boilers were room sealed, ie balanced flue, fan flued, twin flued.
Open flued boilers need a air supply from the room and ventilation from outside.