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  1. M

    Efficiency of air source heat pump water cylinders

    Does anyone know the efficiency levels of the unvented hot water cylinders with a heat pump on top with vents to get the air in to it. I think I'm correct in saying a normal direct unvented cylinder will be 1kw of electric to 1kw of heat
  2. N

    Air Source Heat Pumps

    I have been thinking of going on this course but my only reservation with it is reaching out to the right clientele, has anyone made this transition and started fitting these units? And if so, was it worth doing the course for the amount of work gained afterward?
  3. M

    Heat resistant paste??

    Hi guys What do you guys use when having to solder close to plastics? Are the pastes any good or not? If so, what products are they? Cheers
  4. M

    Heat pump hot water cylinders

    Has anyone fit the hot water cylinders with a little heat pump on the top that has ducts to bring inside and outside air in to the unit. Piping up wise is it just the same as a normal direct cylinder?
  5. eric12

    UK Can a HW cylinder be used as primary heat source for CH only?

    Hi, I would like to know if a HWC can be used as a primary heat source for a new central heating system. My idea is to heat the water in the cylinder in advance for space heating, then use a circulating pump to distribute around the home in radiators. The cylinder will contain radiator water...
  6. P

    Underfloor heat pipe specification and pipe centres and radius bends.

    In my attempt to future proof my underfloor heating design to maximise the heat output at the lowest possible mean water temperature, I am planning pipe 16mm dia pipe centres at 133mm governed by the nature of the installation (3 pipes per space between floor supports at 400 mm ctrs. -...
  7. I

    Heat Exchanger with AGA and heat pump

    Hi All I have a client asking whether they can still use the AGA to heat rads once the air source heat pump is in. I think it is possible using a heat exchanger so the low pressure AGA and high pressure heat pump systems don't connect. I've seen it done on biomass systems but wonder what the...
  8. R

    Vaillant Sustain 28kw Combi Heat Input

    Could anyone tell me whether the Vaillant Sustain heat input is noted in gross or net please. I was sure it was NET but someone has said it's gross which makes no sense at all. I work all my gas rates to NET so if I'm wrong my gas rates will be way out. I've included the data badge.
  9. J

    Rounded screw on plate heat on a baxi duo tec

    Has anyone come across a rounded screw on a plate heat exchanger on a baxi duo tec and not been able to get it out? How did you overcome this on what is essentially an easy job. If possible I don’t want to have to take the whole manifold out on the right
  10. M

    Waste water heat recovery thoughts?

    Has anyone worked on / installed one of these?
  11. M

    Anyone done the heat geeks online courses?

    Has anyone done the online heat geeks training? I believe you get a BPEC certificate when completed. It's a self study course. Thanks
  12. Dan

    Mitsubishi Opens A New Heat Pump Training Centre

    Mitsubishi has opened a new heat pump training centre at its’ base in Scotland as demand increases for greener ways to heat our homes. Heating our homes accounts for around 38% of all gas use in the UK and each gas boiler can put into the atmosphere approximately 2 tonnes of carbon each year...
  13. jamespipe

    Plumber recommendation for heat pump HWS installation

    Hi, My current hot water system needs to be replaced. Anyone got any suggestions or can recommend any plumbers around Derrimut area that won't rip me off? An office guy recommended me to apply for government rebates and get it installed through timetosave.com.au. How reliable is this...
  14. Lou

    Government Told To Do Better With Green Energy Heat Pumps

    The UK Government has today been told to do better when it comes to Heat Pumps and Hydrogen Boilers. A watchdog for spending has said that the Government in the UK needs to do more to make green energy heat pumps and other green central heating options more affordable for the UK customers...
  15. S

    Fd fault on Ideal Heat 15

    Got fd code on Ideal Logic Heat 15. Had two plumbers out and no joy. It’s had a new water flow sensor, flush with sentinel x800 and refurbished grundfos water pump. Boiler tries to light and water pump power light comes on but goes off immediately and boiler flashes fd again. It’s heat only so I...
  16. N

    Heat pump and micro bore pipes

    Hi thank you for letting me join this forum . We have an air to water heat pump but the bungalow is piped in micro bore 10mm pipe which doesn’t look well piped , kinky in pipes in some places ,some of the rad don’t heat up too well , probably because of the badly piped system, the pipe is all...
  17. D

    Hi I have a worchester heat slave 18/25 and continually needs bleeding

    Hi I have a worchester heat slave 18/25 and continually needs bleeding of the Kero, runs all day when bled. when it cuts out on the stat it wont start again without bleeding
  18. M

    Wood burning to heat pump

    My central heating is run off a heat pump ( air to water ) quite expensive to run , So I’m plainning to fit a wood burning with a back boiler to connect to the heating system, So while the wood burning on during winter months it will stop the heat pump for working hard Or not all all . My...
  19. F

    Heat only new boiler recommendations?

    Hi All, Looking for a recommendation for a heat only boiler to replace my 30yrs old ideal boiler. Any makes you would recommend and any to avoid? Thanks
  20. B

    New regular boiler (heat only) in a sealed system??

    Hi, I am replacing our 11 year old boiler (due to H.Ex. leak) with a new one. This is in a "sealed" system with red expansion vessel in airig cupboard & a megaflo (no tank in loft). However the exisiting boiler is Vaillant ecoTEC 4xx boiler - which is satated by vaillant as an "open vent" boiler...

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