heating

  1. R

    boiler timer

    we have a combi boiler with a timer that is always on. we then use a wireless thermostat around the house to control when the boiler fires up. if we don't want the heating on, we simply drop the temperature on the thermostat to a point lower than the current room temperature, which ensures the...
  2. R

    noob question about how water flows through a rad!

    i've recently balanced my system and learned a bit about inlet/outlet flow, TRVs and lockshields, but something is still bugging me. assuming a system is well balanced, and you're using the TRVs on a towel rail, if you set the TRV to 1 (therefore limiting flow) does this mean that the top rung...
  3. M

    Is an expansion tank needed for the heating

    Hi I'm obtaining a few quotes from different local plumbers. Do I need an expansion tank for the heating if the hot water cylinder has internal expansion and does not require one ? I’m looking at having an Ideal Logic Max Heat only 24kw boiler fitted to replace my existing one and a Halo...
  4. P

    Preparation of concrete subfloor for wet UFH

    Hi All, I am doing a kitchen extension. 3m X 6m, and like to install wet ufh. need help to decide the best way to prepare my concrete subfloor for wet ufh. option 1: mot + sand blinding + dpm + kingspan + dpm+ concrete + ufh boards (18mm) + ufh pipes + screed + tiles option 2: mot + sand...
  5. Jack Bycroft

    Hive dual to single channel receiver wiring

    Hi, long story short my hive has been wired using a dual channel receiver on a viessmann combo boiler. Since removing the hub as I’m moving home, it only fires the boiler when I boost the hot water on the thermostat. Spoke to hive who said I should us the single channel receiver for the new...
  6. N

    UFH which one best for wooden and concrete floor?

    Hi All, Need expert's ideas. I am extending the house, I would like to go with water-based under-floor heating. The total floor area is 85 sqm and going to use tiles on top of it. I have 50% wooden sub floor (existing floor) and 50% concrete sub floor (new extension). 1. Can someone suggest...
  7. T

    External oil boiler

    Is it possible to install an external oil boiler in an old out door store cupboard? This model does not have a sealed flue available, but then because the space only has the boiler inside it and is not air tight, is this important? I could even replace the door with a louvred door if that would...
  8. T

    Combi or not?

    Hi Can people please offer some advice on the following choice? We are in the process of fixing our old central heating system which is open vented and has almost no hot water pressure upstairs (cylinder and boiler downstairs). Our plumber suggests sealing the system and installing a mega flow...
  9. Z

    Underfloor heating pump wiring

    Hello everyone, i have installed underfloor heating, and cant figure out how to wire manifold pump so that it only turns on with the heating on and not with hot tap water it is a ideal logic + combi 30 boiler. Anyone know if its even possible?
  10. J

    Victorian plumbing column radiators not getting hot

    Hi I recently moved to a new property and we had all the traditional radiators swapped for column ones. I had a heating engineer into fit these, at first all the radiators were working and getting hot, then in the coming days we noticed certain radiators not working. The heating engineer has...
  11. I

    Direct Unvented hot water Cylinder Question

    Hi There, Wondered if anyone can help me work out how exactly my boiler works and how to use it efficiently to save money after some quite costly bills. I have a Santon Premier Plus Unvented hot water system as well as a slimline Amptec Electroheat boiler (C400) alongside. I'm pretty sure the...
  12. OwainOW

    Another st699 to hive thread

    Hi all, Sorry to add another thread but I’m looking for some help. I have installed a hive v3 water and heating replacing my old st699. This was prompted by removing the old thermostat that I thought wasnt working and doing nothing to find it was infact setting the heat of the house and plunged...
  13. J

    Replacement water heater

    Hi, I have recently moved into a house that has an instantaneous water heater for the bathroom sink. The heater has stopped working so I am now on the lookout for a suitable replacement. The current heater is a Tritan TW10i which I believe is 9.5kwh. As this heater is no longer produced, I am...
  14. G

    Unvented cylinder loses heat super quickly

    Hi guys Great forum. I have an unvented cylinder which is a Telford Tempest 250 litres with external expansion vessel, which we have the hot water on from 6am - 10pm (gas boiler). But within 2 hours of the hot water going off, the water from the cylinder is stone cold. If I turn off the hot...
  15. T

    Help understanding plumbing system

    I've moved house and I'm trying to understand what's going on with the plumbing. I have a combi boiler and then the below system for central heating and under floor heating. However this cylinder is turned off electrically but is hot, so is this fed from the combi? Is this tank just storage for...
  16. J

    New Boiler system sending bills sky high. Help with right setting

    Less than a year now. Got new plumbing system with Atag I40s system boiler with unvented cylinder 210l. Compared to the previous old vented system the gas bill seems to have double out. Plumber set up hotwater to 65° and heating to 70° Can you please advise if the hotwater can be keep lower...
  17. J

    latex flooring with warm water UFH

    Hi, I've been a plumber (not heating engineer) for 9 years now and finally bought my first home. As my first project, I decided to install a warm water UFH system. I've decided on Mapei Latexplan Trade for the screed which will be aprox 20mm thick. The data sheet states max 11mm per coat...
  18. J

    Noise on the pipe when heating goes on and off. Help

    A year ago I got house completely re plumbed with new pipe and heating system. I got system boiler with unvented cylinder. Issue is when heating goes on and when goes of we can hear a very noise on some pipe like TRRRRRR DUDUDUDU ( not easy to explain) This was noted t the plumber last year and...
  19. M

    Which programmable thermostat to replace Satchwell TLM2253

    Looking to upgrade our 30 year old+ room stat with something digital and programmable. Here is the current wiring set up. Is this just switchable with any programmable 3 wire stat? Any recommendations of which models are good and reasonably priced would be welcome. Looking for something with 7...
  20. P

    Nest thermostat with 2 hot water cylinders - how?

    Hello all, been a frequent visitor here for lots of tips over the years, but this is my first question. I would like to upgrade my Drayton digistat 3 (central heating) and separate Drayton LP711 (hot water) controllers to a single Nest system that controls both CH+HW. System is open vented...
Top