combi boiler
Tankless water heaters — also called instantaneous, continuous flow, inline, flash, on-demand, or instant-on water heaters — are water heaters that instantly heat water as it flows through the device, and do not retain any water internally except for what is in the heat exchanger coil. Copper heat exchangers are preferred in these units because of their high thermal conductivity and ease of fabrication.
Tankless heaters may be installed throughout a household at more than one point-of-use (POU), far from or without a central water heater, or larger centralized whole house models may still be used to provide all the hot water requirements for an entire house. The main advantages of tankless water heaters are a plentiful, practically limitless continuous flow of hot water (as compared to a limited flow of continuously heated hot water from conventional tank water heaters), and potential energy savings under some conditions due to the use of energy only when in use, and the elimination of standby energy losses since there is no hot water tank. The main disadvantage of these systems are their high initial costs (equipment and installation).
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Tankless heaters may be installed throughout a household at more than one point-of-use (POU), far from or without a central water heater, or larger centralized whole house models may still be used to provide all the hot water requirements for an entire house. The main advantages of tankless water heaters are a plentiful, practically limitless continuous flow of hot water (as compared to a limited flow of continuously heated hot water from conventional tank water heaters), and potential energy savings under some conditions due to the use of energy only when in use, and the elimination of standby energy losses since there is no hot water tank. The main disadvantage of these systems are their high initial costs (equipment and installation).
View More On Wikipedia.org
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Vokera Combi boiler replacement
My 30 year old good servant a Combi Vokera Flowmatic 20-80 RS has finally given up RIP. Think Vokera don't make them like they used to so not necessarily like for like replacement. Ground floor flat with 5 large radiators and 2 small radiators. As this Combi has served me well I assume it was...- Will1am
- Thread
- boiler combi combi boiler replacement vokera
- Replies: 0
- Forum: Central Heating Forum
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Combi Boiler heats radiators when hot water only is selected.
My combi boiler has started heating the radiators when I select hot water only. Any ideas ? The system has been in for maybe 10 years. -
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Combi boiler making a whooshing noise
Hello, Today a technician came round to check a radiator that wasn't working and turned off all the radiators which fixed the issue. Now the combi boiler is making a continuous noise that seems to be coming from the pipes underneath it. I've turned the boiler off and it's still making the...- adamt1
- Thread
- america boiler combi combi boiler making noise usa
- Replies: 0
- Forum: USA
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Set Worcester combi boiler to circulate without heat.
Hi there - I have a Worcester Greenstar 25Si combi boiler running our heating rads. I've recently added a small tank with a heating element powerd by solar into the rads circuit. It's producing good heat, but I need a circulation pump to be on to move the heat around the system. Ideally I'd like...- gcleve
- Thread
- boiler circulation combi combi boiler heat recirculation pump without worcester
- Replies: 1
- Forum: DIY Plumbing Forum
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New build heating engineer needs pointing in the right direction.
Hi, I have a vaillant ecotec plus boiler (pre 2012 model) that is giving me hot water issues. It points towards a hot water heat exchanger issue or diverter valve, but I have replaced the diverter valve (old one seemed to still operate as it should as well) so it would seem that wasn't the issue... -
P
Combi boiler issue or Shower?
Hi Yesterday my shower in the bathroom started to run cold. It started fine but then ran cold...then got warm again before running cold again. This continued and then just ran cold. Other taps ran hot as usual so thought it could be the shower/cartridge. Instead of fiddling with manufacturers... -
G
Warm flow combi boiler /No hot water
Need help please... My Warmflow oil fired combi boiler will not supply hot water to my domestic taps but the central heating works fine. This is a dual pump system. I have linked out the connections on the boiler stat which causes the hot water pump and system to work and able to get very hot... -
K
URGENT Worcester Heatslave 15/19 Oil Combi Boiler Pressure
My boiler pressure gauge is at zero so the boiler is not firing up. I thought I heard a small water leak in the wall near the boiler the other night, just before this happened, but the leak has now stopped. I have been reading other posts to try to find a solution and I've hunted everywhere...- Klosblue
- Thread
- boiler combi combi boiler heatslave oil pressure urgent worcester
- Replies: 10
- Forum: Central Heating Forum
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Installers with experience of Hybrid Solar Thermal / ASHP and Combi Boiler in Sussex Area
Hi, I'm looking for someone to help specify, and possible install hybrid system. Initially the bungalow was setup for all low temp (underfloor heating and Fan assist heating rads), but couldn't afford ASHP at the time, so fitted a Vaillant Ecotec Plus 937 Combi as the heat source. Now looking to...- UKAS_Cal_Lab
- Thread
- ashp boiler combi combi boiler experience installers solar thermal
- Replies: 6
- Forum: Renewables
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URGENT Ignition issue Main Eco 30 Combi boiler
Hi All, I have a Main Eco 30 Combi boiler I was fitted about 7 years ago, the whole pipe work is new and radiators. I have so far replaced the electrodes since it was old and bent (it was working but I wanted to avoid it failing), the heat exchanger was hoovered and the seal was replaced, the...- Jam007
- Thread
- boiler combi combi boiler eco ignition issue main urgent
- Replies: 18
- Forum: Central Heating Forum
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Heatslave 25/32 No HW
Hi guys just installed an oil 25/32 external Worcester Bosch Heatslave External boiler. I can't get hot water. Central heating is fine. Comfort rf fitted and seems to be working fine. Link wire has not been removed. The sensor is not registering the dhw lts per minute display. Any help...- Ryooo
- Thread
- combi boiler heatslave no hw oil boiler worcester bosch
- Replies: 20
- Forum: Central Heating Forum
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Combi boiler. Running CH whilst DHW drained.
Have a query regarding a morco combi boiler in a mobile home. It's set up with a link on the thermostat connections within the control panel and heat is controlled by Trv's. I'm planning on adding a hive thermostat to give me more control and intend to use the app. My question is, when the DHW... -
C
Cold Electric shower when any tap turned on
Sorry a slight variation on other posts! I recently moved into a 3 storey semi (new 2017) Top floor, ensuite Electric Shower Middle Floor, Electric Shower and extra shower fittings off bath, WC, Basin Ground Floor. Cloakroom, WC. Washing machine Combi Boiler Problem- Ensuite Shower goes cold... -
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Do I need to keep the overflow tanks in my loft if I get a combi boiler?
In my loft I have 3 water tanks. A bigger black one, that I believe is the cold water overflow. A smaller black one, that I believe is the hot water flow, and a big brass tank that stores the hot water I heat. I'm thinking about getting a combi boiler, and I would like to know that if I do get a... -
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Currently awaiting repair Combi Boiler leaking for 8 years. Is my plumber incompetent?
Hi everyone, my combi boiler has been leaking for 8 years. It is a german Vaillant VCW 204 https://www.google.com/search?client=firefox-b-m&biw=1280&bih=672&tbm=isch&sa=1&q=vaillant+vcw+204&oq=vaillant+vcw+204&aqs=mobile-gws-lite..0l5#imgrc=b27-0Ajev_snmM%3A The thing is, this device is from... -
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PRV and condense discharge form a combi boiler
Good day all, First and foremost i am not a boiler installer or gas registered, therefore i do not touch this element of plumbing, but i am after the correct advise regarding the following issue. I have had a gas installer who has piped the PRV and condense discharge pipe from a combi...- sly
- Thread
- boiler combi combi boiler condense discharge prv
- Replies: 7
- Forum: Central Heating Forum
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Thermal store combi boiler, hot water flow rate.
Can anyone tell me the hot water flow rate on a thermal store combi boiler? As opposed. To a 40kw combi that will deliver nearly 16litres per minute. And any recommendations for a good thermal store boiler thanks. -
J
Hot metal/burning smell from combi boiler
Have some problems with my boiler that cant seem to get fixed. It's a worcester bosch greenstar cdi 30 combi and it's about 5/6 year old I think. So basically the boiler has been making like a burning/hot metal smell. But it seems to only make the smell when the boiler has been like working...- J0313
- Thread
- boiler combi combi boiler hot smell
- Replies: 9
- Forum: Gas Engineers Forum
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Smart thermostat solution?
Hi all, I am after some advice with upgrading my control system on my oil fired boiler. Currently I have an trianco Eurostar combi. It supplies heating to all of my house and hot water to half. It has a standard honeywell programmer and 2 wired battery powered wall stat. Hot water for the other... -
J
HOT WATER IN CYLINDER BUT ONLY WARM WATER FROM TAPS?
Hi all, Over the last month we noticed water coming out of all the hot taps and shower would only come lukewarm. The puzzling thing is control unit states that the temperature in the unvented cylinder is at 69-70 degrees celsius. When I’ve I released water directly from the cylinder and felt...
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