Best solution is probably a programmable stat such as Honeywell CM907 a 7 day programmable stat that is battery operated and just has live in and live out to boiler. Stat has low battery indicator to tell you when to change the two AA batteries. Each of the 7 days can be programmed individually...
Please can someone help with calculating the size of a low loss header or point me in the direction of a website or guide that has the info. I need to install a single horizontal header to transfer approx 40kw from Plate heat exchanger connected to heat pump in to a single heating circuit. Duty...