New boiler & central heating system

sbc_2

Hi, I wonder if anyone can help?? We are currently in the early stages of buying a house built in 1903. It has 3 current boilers, 1 for hot water, 1 for heating on floor 1&2 and the other boiler for heating and hot water on the third floor. As a result the EPC rating is F. We have not had a survey done yet but was just after a rough estimate for a whole new system (this is assuming the current 3 systems can't be brought into one) It's a 5 bedroom house on 3 floors. The rooms are all big, 2 being 15ftx15ft, 2 15ftx13ft and others all around 15ftx10ft.

Also does anyone know why a house would possibly have 3 boilers??? They have all been serviced annually and are all currently working.

Any help/advice would be appreciated!

Pincher

Loft apartment, two storey maisonette.
Two households, two set ups.


As always, insulate first.

My Kingspan in the roof are not recognised, because, what the EPC inspector cannot see, does not count. Unless:

1. I rip open the ceiling to show him, or
2. I have photographs recording it was put in, or
3. I have a certifcate from a recognised insulation company, or
4. I have an invoice from a recognised insulation company


No, my builder did it. He has no certification whatsoever.
Just me making sure everything is done properly. Which is not good enough for the EPC inspector.


Take pictures of the internal walls from bare wall, through intermediate stages. Keep thermal characteristics and the tickness of plaster applied, so the EPC inspector can work out the U value.

See http://www.chroda-eco.co.uk/documents/ThermoPor Product Datasheet v2.0.pdf




The other things that drag down the rating are mostly irrelevant, because when you upgrade, you will put in room thermostat, TRV, timer, cylinder with lagging anyway; and you have no choice but band A boilers.




I assume you have three bathrooms, one kitchen.

Solar thermal panels on the roof, solar compatible THERMAL STORE with indirect heating and under floor heating connections, anywhere convenient, probably on the first floor next to a bathroom, utility room and juction room for pipes and cables. Mains pressure COLD water goes through the thermal store, as a pre-heat. The preheated water goes to two gas heaters: the gas water heater in the loft, and a gas combi boiler in the kitchen.


The loft gas water heater heats the pre-heated water to supply two bathrooms. The kitchen combi heats the pre-heated water to supply hot water to the third bathroom and the kitchen.


The heating is mainly supplied by the combi, but with a twist.
Ground floor uses radiators like before, but you put in underfloor heating for 1st floor and loft. The combi central heating circuit heats the ground floor radiators and the THERMAL STORE. The UFH manifold takes heat from the thermal store! Obviously the manifold is best situated in the junction room. Put in two insulated 22mm pipes in case in want to use Air source or Ground Source Heat Pumps in the future for the UFH.



With the thermal store, the store water does not mix with the water flowing through it, so there is no bacterial problem. This means we can maintain the top of the thermal store at 40 degreefor supplying pre-heated water, while lower down it's 30 degrees, perfect for UFH.
A 24kW boiler will work at peak effciency all the time, because it is ALWAYS CONDENSING!


You don't need a 30kW combi, because we are raising water temperature from 40 to 50 degrees for showers, not from 10 degrees in winter!

The solar thermal is just a would like to have option, but it will lower the summer hot water bill quite a bit.