In article ,
Doctor Evil wrote:
1. Low capital cost of installation

The cost of *installation* is lower with two boilers? Or just the capital
cost?

2. Running cost, upstairs heating can be off most of the day.

Little advantage given the way most use bedrooms for things other than
sleeping? Oh - and keep all doors closed at all times?

3. No waiting for showers

You don't have to with a storage system.

4. Showers don't run out of hot water

They wouldn't need to, given the time needed to get clean in those
dribbles.

5. Simple zoned heating system with independent time zones.

Not difficult to achieve with one system, but in practice of little use in
most ordinary homes.

6. Different rad temperatures on different floors.

Err, TRVs?

7. Less controls to go wrong, with accompanying down time and expense.
(no zone valves and the likes)

But two programmers, two programmable stats and most of all, two pumps?

8. Always heat and hot water. Two combi's means built-in redundancy.

And twice the chance of failure?

9. Release valuable space for storage.

Let me see - adding a second boiler releases space? Is this in a Tardis
sort of way?

Only disadvantage is slightly more expensive on regular servicing, which
is overwhelmingly offset by the above points

So you keep on saying. Most would consider it a lose lose situation.

With the extra installation costs well outweighing any savings against a
larger boiler.

--
*Why is it that rain drops but snow falls?

Dave Plowman London SW
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