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robertgf, it took me a long time to fathom out wot was missing.
Any ideas of incoming temp & required temp?
Is the Restaurant private or public & what is the throughput?
How efficient is the lagging on the circulation pump?
Was the old system coping with the demand?
He tated that the present system was 880000BTU’s but was thinking of installing a 398000BTU system.
Maybe he is working on the basis that the global warming is to fill the gap.
Mate you can only get out of the system wot you put in.
Bob [email]www.rheem.com.au[/email]but remember we work in calories