Boiler Scrappage Scheme

My parents had a newer boiler than mine. When they had a gas valve replaced, it cost nearly $500. I called a different HVAC company and they said that it was about right. I am trying assess the wisdom of buying a new boiler. I have an old Maclean-Weil (hope that’s right) about 40 years old for a split level home about 1800 square feet plus sub-basement.

It needs to be able to handle a load of about 1200 GJ annually. Call it 1500 or 2000 for simplicity and overload avoidance. Any efficiency above 80% would suffice. Anybody got an idea of how much the unit would cost? (within a few grand), I have no idea about the cost of these things?

Great? New Boiler scrappage scheme if you run a working G-rated boiler.
How do you know which make, model of boilers these are.

are new burners like (RIELLO)better on efficiency and heat if all the calibrations are the same and using the same size nozzle and angle as on a old burner of say 10 years old.if so can you give the reason
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I can’t find it at all in the Government’s “Boiler Efficiency Database”.
I’m trying to budget to replace my broken old boiler, and if this boiler is “G” rated I might be eligible for a discount?

PS – I am broke and FREEZING! NO HEAT (just v expensive useless electric radiators) and NO HOT WATER!

A. FD fan
B. Steam air warmer
C Scrubber
D. Air heater

How does adding a small (40 gallon), efficient holding tank (like a Maraathon or Stiebel Eltron) along side my exisitng system improve the efficiency of heating domestic hot water (I use heating oil to heat my water)?

It makes no sense to me, because my boiler keeps water in the water jacket and the additonal water is just more heating load… or maybe I’m confused about how my boiler really works???

Stuck with this question:

A coal fired steam plant takes in feed water at a temp. of 80C and produces 12.5 tonnes of steam per hour at a pressure of 60 bar and a temp of 400C. The input power to the boiler can be derived from the following information:
Fuel consumption rate is 1.25 tonnes per hour.
Calorific value of the fuel is 36MJ/kg.
Determine the power rating of the boiler and it’s thermal efficiency.

(if anybody can help me with this it would be a great help, any working out helps me understand it more thanks)

I live in the UK, in a 1970’s ex local authority semi and it has the standard ‘back’ boiler which was fitted to many homes built at that time. After the recent gas bill rises I decided to turn the boiler down to hopefully reduce my energy bills but discovered that the boiler is on setting 2 (out of 5) My question is, would it be better to turn it down to 1 of in fact turn it up to 3 or even 4 making it run hotter and therefore reduce the amount of cutting in and out it does to heat the water tank.
Basically I only have hot water on gas (heating is off at the mo) and it seems to be costing me around £1.50 a day which does seem quite expensive for a couple of showers and some washing up per day.