This HEATING HACK That Will CHANGE Your Life! 🛠️

[@andrewkennedy1172]

Legionella is not a concern in a sealed system heating system. Most modern systems heat cold mains water on demand, so no stored hot water to be concerned with.

[@laurensdewitte6088]

As far as I know, an efficient boiler depends on the low return temperature, not on lowering the flow temperature. Lowering the flow temperature increases the chance that the boiler will cycle sooner and can cause wear and tear on the boiler due to more starts/stops. It is possible to get a low return temperature by lowering the maximum capacity of the boiler. The modulating thermostat determines the flow temperature, depending on the ΔT between the desired room temperature and the actual temperature. The maximum temperature can be determined based on a rule of thumb by multiplying the gas consumption in m3 by 8 kWh and dividing by 1650 h. The 8 kWh is the energy value of gas. The 1650 h is approximately the number of full load hours per year. In case of comfort complaints on a cold day, the capacity of the boiler can be increased by 1 or 2 kW. The maximum capacity of the boiler must always be above the minimum capacity of the boiler to prevent boiler malfunctions.

[@TheRoybeasley]

I just let my boiler manage it for itself. In a really cold snap it runs the flow temperature higher for an hour or two to begin with, but once things are on an even keel it reduces it again. In less cold conditions it still peaks, but at a lower temperature.

[@honeychild8525]

Useful tips, thank you

[@salibaba]

Well done Adam and the heat geeks. Seen the pieces you did for Channel 4. Very well done 👍🏻

[@Candisa]

Most people would be surprised on how low you could go with flow temperature. I waited for some really cold days, dropped the flow temp to 40, set the living room thermostat and thermostatic valves in the other rooms as high as they could go, and them upped the flow temperature to the point every room was just warm enough when freezing outside... Turns out 45°C flow is plenty for my house, no need for the 65°C it was set at when installed.

[@bimblinghill]

My most recent project at work was installing a heating system in a new build - so with modern standards of insulation and also underfloor heating. Over the Christmas break it has been heating the house effectively at 28deg flow temp! The floor feels cool, but the house feels warm.

[@bimblinghill]

The process you followed to find the optimum is the same one I use by the way.

[@carlwilliams7687]

I'm at 40c at the moment, but there is potential of going even lower. Lower the temperature the less power the heating has to overcome draughts, so once you hit a temperature that is great go slightly lower and locate the draughts and get them sorted and you be able to go to an even lower temp. If you have double glazing of 10 years amor more replace the rubber seals and check to see if they have been sealed round the edges, also check to see if the cavity is not open to either the outside or inside (this is what's preventing me dropping to a lower temp)

[@rarra]

@@carlwilliams7687 how do you check if the windows are sealed around the edges?

[@carlwilliams7687]

@@rarra If the room is finished using dob and dab then any draught coming from the skirting board will be a pointer that there is a failure in insulation. Though due to I'm more convinced the windows in my house has not been properly insulated, I'm cutting though the plasterboard to directly inspect it, at the moment I'm having to expandy foam around each of them Never trust the enemy performance certificate, as I would of rated this as a G not a C. I'm no heating engineer or expert in this, just learning as I go. Though I would recommend ensuring there is no draught coming in before going for a heat pump otherwise I would think a heat pump wouldn't be able to run optimal

[@cristideac7404]

I have a combi vitodens 100 B1KF, 25 kw. Water flow temp heating the rads is 38-45, with outside temps 3 to - 2. I'm happy with the performance of the boiler.

[@filippgyemicsev4057]

Did you forgot to mention that it is for combi boilers? Turning down the temperature.

[@martinclemmensen8071]

How do i turn down my flow temperatur on my vaillant air source heatpump?

[@TC-V8]

Putting on a jumper and slipers can save you 17% 😂

[@ghengis430]

And when you've done everything you're meant to do, get in bed. ( Take your slippers off first)

[@lua-nya]

Imagine not having outside room temperature compensation in a modern system.

[@weaverbike]

I have mine running at 53c for December , i did have it down to 47c early in the year , the house has a more comfier temperature

[@carlbull8008]

I have looked on my oil boiler and there is nowhere to turn down the flow

[@ebebop]

Oil is more efficient it can run a hotter flow and return and still condense.

[@TheRonskiman]

Already turned down to 45c although only about a month ago.

[@Car-guy307]

How does servicing a boiler save up to 10% ?

[@carlwilliams7687]

Depends on the type of service, a general inspection won't but a cleaning of the burner will as there will be carbon deposits that will slow the transfer of heat from the compustion chamber to the water allowing more heat to go up the fule instead of heating the house

[@HeatGeek]

As above.. and they could also range rate the alliance or turn the flow temp down while they’re at it

[@delboy6384]

Saving gas yes, but where is the evidence it prolongs the life of the boiler?

[@Candisa]

At a lower flow temperature, the boiler will run for longer at a time but with less power, reducing on/off cycling, reducing temperature and pressure swings in the system, and reducing the wear on the burner, heat exchanger, sensors, pump...

[@jollygiant]

Very useful, but not below 60degC due to risk of Legionella bacteria!

[@TheRonskiman]

I'd suggest you go and have a read up on Heatgeeks website, specifically the bit about legionella. It also pretty much irrelevant on combi boilers, as they don't store water.

[@DevAnubis]

Not in the radiators it isn't 😅 But even for the hot water system, if it's a combi there's little point as the only position Legionella could develop is the pipes between the boiler and taps, and that will be cool enough for Legionella regardless of if you run the hot water at 45 or 60. 45 means you'll never scold yourself and can run the hot without mixers safely.

[@DevAnubis]

kzbin.info/www/bejne/pXvIqpaVmKx8g7csi=o_trpsZfyPKLXpA_

[@jollygiant]

@@DevAnubis thanks for the specifics, I was referring to a bounding safety case regardless of the type of hot water system.

[@edwardpickering9006]

Nonsense, only if the water is stagnant for a long period. As long as you are using some evey day will be fine at 50 degrees.