manxtatt2 wrote:

What Andy said, plus:

also what would be ideal times for setting heating to ?? is is ideal
to have it on for say 2 hrs in am , and 2 hours at night , does that
use up more gas, or have it on for longer

Using a programmable thermostat is perhaps the simplest way. That way
you simply leave the heating "on" permanently - the stat then controls
when it needs to run to reach your pre-set temps. Hence you can have it
warmer for some times of the day, and cooler at others.

--
Cheers,

John.

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