Grant multipass 70/90 or firebird super Q 50/90 ?

Jim1000

hello,

Before I go consulting engineers and plumbers I just wanted the opinion of some of you good experienced folk here on boards.

I have a small old second house which was the original home house. Its mostly used for storage. The things in it are getting mouldy however and I want to be able to heat it sometimes during the winter. Long term plan is to demolish the house in about 3 yrs or so and build a bungalow on the site. In the meantime its not worth buying anything new for it.
It had oil central heating but the boiler was removed years ago. However the plumbing system was installed just before it was left vacant and seems to be in good condition.2 separate neighbours houses have both gotten insulation grants and new condensing boilers in the last 2 years. They have both offered me their old boiler. I know that they were both working up to deinstallation and that they were serviced regularly.
I have worked out the btu required btu. I have added for hot water as during lambing season or major farm works, I stay there sometimes for days on end and need hot water also. I have been very liberal but still it comes to less than 45,000 btu required.
I know its an open plumbing system.
One boiler is 14 years old, is a firebird super Q 50/90.
The other is barely 10 years old, grant 70/90 which appears almost new.
The grant says on it “multipass sealed system boiler” or something to that effect.
So, my question is, I know my heat requirements are closer to the firebird but as the grant is in much better condition is there a way the power output of the 70/90 could be reduced to match my needs?

Many thanks for your valued opinions.

Jim

Flood

Grant, firebird don't have a clue.

Jim1000

wow Mr Flood, that was fast.

Even though its a higher output than I need you think grant is better? Can I reduce this power?


Thanks for the speedy reply.

Jim

Flood

You can employ better heating controls, grant use 1mm more steel in their boilers also.

Jim1000

thats great. I am just concerned as the grant says "multipass sealed system boiler" Does that mean the boiler is for a sealed system only? Neighbour doesn't know what kind of system he has. He did say there was an orange expansion vessel in the boiler housing also which the plumber took with him as he needed it! However I do have an expansion tank in attic already.

Thanks again

Jim

Flood

Grant does every system, they are top class.

jimf

go with the grant and when installed get somebody to set it up properly for you at its lowest output using a fga and you should be fine

Dtp1979

The older grant and firebird were close enough quality wise. The newer condensing ones are miles apart.
I'd go with firebird purely because you've the option of setting it to 50.
This can only be done using an oil pressure gauge and flu gas analyser though.

Jim1000

thanks to all who replied. Opinions vary so I am no wiser really.
No matter one I go for I will be getting a professional to set it up properly.