Need a quote for a big system - supply and install

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phantom84

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Been posting on here a lot recently as we have a new build which is a pretty big job and need a company to quote on a boiler system as its on a light commercial use system.

I have some information on the number of radiators in the house etc so hopefully can get an idea of what sort of boiler system to go for.

In total there is 32 radiators which includes 6 towel rails. All the radiators are doubles and 600mm high

03 x 1000mm
01 x 1200mm
13 x 1600mm
08 x 2000mm
01 x 3000mm
06 x 600mm Towel Rails

In addition to the above there are also 4 salamander shower pumps.

In total there is 4 floors and these are the areas which require water at a good pressure:

Loft - Bedroom and Ensuite
First Floor - 3 Bedrooms with Ensuites and Master Bathroom
Ground Floor - Kitchen, WC
Basement - Open space just radiators no water down there.

I dont know what the BTU rating is for all the radiators but from what I know we need some sort of mains pressurised unvented system with addtional cold water storage tanks? We have had the mains incoming water supply upgraded to 32mm.

Is anyone able to provide a quote for supply and install of suitable boiler system.

Rads are already installed.
 
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where are you, outer hebrides, mayfair, somewhere in between ? it does make a difference.
 
phantom84 said:
Is anyone able to provide a quote for supply and install of suitable boiler system.

Rads are already installed.
Click to expand...

Are you seriously considering this as a method of finding an installer. How on earth did you get everything else done on the project?
 
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In addition to the above there are also 4 salamander shower pumps.
Click to expand...

I would ditch that idea and go for a single pump system with invertor control, hooked up to an unvented cylinder or thermal store.
 
phantom84 said:
I dont know what the BTU rating is for all the radiators
Click to expand...

Hopefully whoever designed the system taking into account building heat losses and appropriate delta-T for the boilers does know what BTU the radiators are. It would be more optimistic these days if he was working in kW and understood how heating system design can affect a building's SAP rating.

Or did someone just choose the radiators that looked pretty and hope for the best?

Why 4 shower pumps not one?

How are you going to pump on a direct mains system?

Has renewables and feed in tariffs (now or in the future) been considered?

What is the mains gas supply to the property and can be be uprated to a commercial sized meter?
 
This is not comparethemarket.com...get some reputable local installers around to give you some quotes
 
condensing boiler for heating and a seperate hot water heater with flow and return system otherwise hot water will take years to pull through on a system of this size
 
Back with a blast from the past and his advice is just as good now as ever ;)



Shame he's such a looney :evil:



BigBurner said:
1. The house is large, so use Two Combis (this is highly cost effective for what it offers):

  1. Two combi's will provide good showers for as long as you want - all day in there with two showers going, if you are that way inclined.
  2. The two combis release valuable space taken up by cylinders and gives a natural simple zoned heating system saving money on fuel bills.
  3. No contest, the two combis win hands down, on all points to gain a zoned heating system - one combi on a stat/programmer does upstairs and the other on a stat/programmer does downstairs. Totally independent supplying two floors.
  4. Two combis guarantees good showers and a bath (combine the outlets for the bath only using two non-return vales and small shock arrestor, and liberating space:
Two combis win on:
  • Low capital cost of installation. Combis are cheap. Two combis gives more and cheaper than a system boiler and unvented cylinder.
  • Cheap running costs, upstairs heating can be off most of the day.
  • No waiting for showers
  • Showers never run out of hot water
  • Simple zoned heating system with independent time zones.
  • Different rad temperatures on different floors.
  • Different room temperature stat settings on two floors
  • Less controls to go wrong, with accompanying down time and expense. (no zone valves, complex wiring and the likes)
  • Always heat and hot water in the house somewhere. Two combis means built-in redundancy (backup).
  • Super quick warm up. Two combis heating a house from cold does it in super quick time.
  • Releases valuable house space by eliminating a cylinder and tank.
  • One combi can supply the kitchen and the other the utility room - always hot water in the food area.
  • Fast bath fills as they only combine DHW outputs to fill baths. Two cheap 10 litres/min combis will deliver 20 litres/min.
  • Less wear as the usage is spread between two combis.
  • Quick installation.
  • Simple installation.
  • Simple electrics. A mains point to both and one from each to a stat/programmer on each floor. The stat can be a wireless model for even simpler installation.
  • Using integral weather compensation in the combi means just two outside weather sensors side by side on the north face of the house, giving maximum condensing economy.
  • The two combis can be in separate locations or both together, or both out of the way in the loft.

Only disadvantage is slightly more expensive on regular servicing, which is overwhelmingly offset by the above points. In fact the same servicing costs as a system boiler and unvented cylinder, as an unvented cylinder needs an annual service.

I specified a few installations not long ago using two combis. The Pikies were stealing expensive cylinders. No cylinders and combis on jigs with plastic pipes and removed until final commissioning. They work a treat and customers are delighted with them, especially when two people are using two showers - one shower does not interfere with the other and they can stay in them for ever and no waiting for recovery of stored water.

Look at Broag. Two Avantaplus combis would do, http://www.avantaplus.co.uk which are quality, well priced, 5 year guarantee and with a much superior integrated OpenTherm control system with integral weather compensation. I would seriously consider this route with your requirements and size of house. A 28kW combi is: £645.08 inc. VAT. X 2 is just under £1300 with a few quid extra for the outside temperature sensors.
http://www.tradingdepot.co.uk/DEF/c.../Central Heating Boilers/Broag Remeha Boilers

2. In-line electric instant water heater:

If it is DHW backup you want try a in-line backup water heater for combis. Look at this thread:
//www.diynot.com/forums/viewtopic.php?t=152381

Simple, small, easy and will give backup for a shower and a tap or two, until boiler back up.
Click to expand...

Ps what happened to the installer that originally specced all the rads and who are you going to hold responsible if they don't heat the place enough?
 
Ok thanks for the replies I think, to answer some questions its a new build where the old properties was demolished and rebuilt so not done by a company on a new estate.

We are still waiting for gas to be supplied to property

@lcgs PM me mate

who are you going to hold responsible if they don't heat the place enough?
Click to expand...

This build has been a nightmare and to be honest thats the least of our worries, we just want to get everything in and working to a decent level so we can move in. Who ever installs the boiler will surely be responsible if they cant feel up to it theres no obligation to do the job.

Why 4 shower pumps not one?
Click to expand...

Because theres 1 bathroom and 3 ensuites and to be honest each ensuite has a bath and mains power shower not electric shower. The smallest ensuite is probably the same size as some peoples bathroom.

Just looking for some assistance, have contacted local installers but no able to quote us so far, just trying to cover all possible aspect of getting sound advice. Been through yellow pages and the other day had a quote for £15k which is well jaw dropping.
 
Have you tried T&S Heating? They have a good reputation for value and big enough to cope with all things heating? If they quote around £15k then that's going to be the going rate.
 
joe-90 said:
Have you tried T&S Heating? They have a good reputation for value and big enough to cope with all things heating? If they quote around £15k then that's going to be the going rate.
Click to expand...

Yep got Citigas, T&S coming out next week just waiting to hear back from Beamas
 
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