Search results

as i have pre-settable rad valves im trying to figure out what temps i should be setting them for and what return temps etc take a 500x1600 t22 what temp should i using as flow and return? should it be the max temp the boiler will use at -3? id likely be using 36.2 based on my current curve...

so i have a 200-w combi and its great but especially on a night it heats the house more than it needs even with a low setback obviously the outside is likely far colder so it still trys to heat but the house hasnt lost anywhere near enough so even trying to do 14c setback it just slows the...

so i have a 30kw vitodens 200w b2kf i am trying to figure out how i should have the pump configured for the min and max pump rates its currently set to 40%/60% the bits from the instructions are here im running really low flow temps and therefore dont need huge amounts of flow. the system has...

hi, thought id have another go but i cant change the gas correction factor on the boiler in either the user setting or the installer menu's it just stays at 1.0000 no matter what i type i mean its not an issue except i want to use the data for working some stuff out regarding degree days so id...

so im my continuing quest of dicking around to get my gas costs as low as possible (for fun more than anything) i started looking at DHW production with my Viessmann 200 30kw combi it was already alot lower than with my old vaillant in 2020 my average dhw usage about 250KWH 2021 about 180kwh (i...

Hi, i have a situation where my shower(boiler) isn't working as expected The shower is a flova go click valve (few years old but on whole house softner) and boiler is a viessmann 200 combi (brand new) Im trying to run the DHW at 38c as it doesn't need to be any hotter (please no legionella...

Hi brand new install of a 30kw 200 combi And it isn't doing what I'd expect or hoped It's set with a 50c Max temp range rated to 23% heatloss is less than 7kwh But it is having very short burn runs of about 5-7 minutes And I'm only getting about a 10c drop between flow and return yet I...

Hi I have a Vaillant ecotec plus 937 its a gen 1 version as far as im aware so doesnt have the menu on the display like the later version. Anyway it was installed in a new build 6 years ago 4 bed detached with 2 adults. last year i installed evohome (with opentherm) using ATP921R3100...