New Boiler Advice

[shambolic]

Oh do shut up! You now need a plant room in your 2 bed mid terraced house for this £25k monstrosity.

 

[bernardgreen]

As expected a knee jerk over reaction.

It need not be a "monstrosity" if the heating system is designed properly. If the system requires a combination boiler then obviously the boiler casing will have to be large enough to contain all the extras that a combi boiler needs and a heat only boiler doesn't.

For my large 2 bed cottage the heat only boiler is 380 mm wide 650 mm high ( 800 mm over the flue ) and 310 mm deep. The cylinder in the airing cupboard is 1000 mm high and 650 mm wide including pipe work. ( I am fortunate in having a bath room that is 2500 mm by 3500 mm ) Header tanks ( water levels ) are 2500 mm above floor level so pressure to taps ( highest is 900 mm above floor ) is about 0.15 bar which, with less than 2.5 metres of pipe run from cylinder, gives a more than adequate flow. They do not have ( reduced ) mains pressure so the flow is fast but gentle and cannot "bounce"out of the basin even when the tap is fully open.

For keeping this cottage warm even this small boiler is too large. The small heat loss from the airing cupboard keeps the upstairs warm over night without the boiler having to fire up.

As you mentioned them, Plant rooms can have the various components spread apart for easier access for maintenance and repair / replacement...a domestic combi boiler has them all squeezed into the smallest possible casing. Do plant rooms have moulded plastic components ? From my time on control and monitoring systems I cannot recall seeing any plastic valve gear other than on some corrosive chemical pipe work where stainless steel was not suitable. I also recall that the injection moulding process has to be properly specified and then closely controlled to prevent ( reduce ) the creation of stress areas caused by differential contraction as the plastic cools. ( these are from times before Google and are from hands on experiences )

 

[gmgas]

As expected a knee jerk over reaction.

It need not be a "monstrosity" if the heating system is designed properly. If the system requires a combination boiler then obviously the boiler casing will have to be large enough to contain all the extras that a combi boiler needs and a heat only boiler doesn't.

For my large 2 bed cottage the heat only boiler is 380 mm wide 650 mm high ( 800 mm over the flue ) and 310 mm deep. The cylinder in the airing cupboard is 1000 mm high and 650 mm wide including pipe work. ( I am fortunate in having a bath room that is 2500 mm by 3500 mm ) Header tanks ( water levels ) are 2500 mm above floor level so pressure to taps ( highest is 900 mm above floor ) is about 0.15 bar which, with less than 2.5 metres of pipe run from cylinder, gives a more than adequate flow. They do not have ( reduced ) mains pressure so the flow is fast but gentle and cannot "bounce"out of the basin even when the tap is fully open.

For keeping this cottage warm even this small boiler is too large. The small heat loss from the airing cupboard keeps the upstairs warm over night without the boiler having to fire up.

As you mentioned them, Plant rooms can have the various components spread apart for easier access for maintenance and repair / replacement...a domestic combi boiler has them all squeezed into the smallest possible casing. Do plant rooms have moulded plastic components ? From my time on control and monitoring systems I cannot recall seeing any plastic valve gear other than on some corrosive chemical pipe work where stainless steel was not suitable. I also recall that the injection moulding process has to be properly specified and then closely controlled to prevent ( reduce ) the creation of stress areas caused by differential contraction as the plastic cools. ( these are from times before Google and are from hands on experiences )

I like your style