Tue 5 Sep 2017 15:41pm
I'm renovating my house (3 bed/2 bath) and will be installing a full new plumbing/heating system. The house is supplied with natural gas. Downstairs will have piped underfloor heating (using around 7kW output) and upstairs will have 5 medium sized radiators. The water flow rate at the mains is really high (47L/min). My wife has requested that the shower be really powerful. I will install a shower head which allows a high flow rate, and run the DHW pipes in 22mm, but could you advise me on the best boiler for the job of providing a large flow of hot water. There is currently only 2 of us living at the property and we don't want to install a how water cylinder. We just want a combi which will provide a fully 'drenching' shower. I normally install vaillant or worcesters so would prefer one of those. I was thinking about the Vaillant 938 which can provide 20L/min, but once the stored hot water is used this will drop, and this won't take long if I have a powerful shower. Can you advise?