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system boiler

A chiller boiler system includes a chiller, a boiler, pumps and HVAC controls in a single pre-engineered package. This reduces complexity for the field installer and increases the simplicity of installation overall. Most chiller boiler packaged systems are designed for large residential and small commercial structures.
A chiller boiler system is a hydronic system. It uses water instead of air to heat and cool a structure. A properly designed hydronic system is usually more efficient than a standard forced air system.Chiller boiler systems use radiant heating and cooling or fan coil systems to condition a home or business. This allows for multiple zones (a thermostat in each living area of the house) for increased comfort and decreased energy use.
Compared with air, water is a more space-efficient method of transferring heat around, into, and out of a building. A pipe of a given diameter can transfer heat at the same rate as an air duct with eighteen times the cross-section area and is much easier to install in small spaces.

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  1. S

    Worcester Bosch Greenstar 24i Mk4 system boiler that is locked out.

    Hey Folks. I have a Worcester Bosch Greenstar 24i Mk4 system boiler that is locked out. The boiler was working correctly, then the gas supply was turned off (to service another appliance) but the boiler was not turned off. I assume that the boiler tried to cycle on and off as requested by the...
  2. G

    Connect HeatMiser UH8 to Vaillant system boiler.

    Hello everyone, Could do with some advice please This is my current setup: Vaillant ecotec plus 637 system boiler Unistor unvented cylinder Vr66 wiring centre Vrc 470f S plan system Now I have just had underfloor heating installed and a HeatMiser UH8 wiring centre, a new motorised valve...
    • GG1
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    • america boiler connect heatmiser system system boiler usa vaillant
    • Replies: 1
    • Forum: USA
  3. Ryooo

    Nest Thermostat to Control System Boiler with 2 Zone CH & 1 Zone HW

    Hi troopps, I'm looking to install a nest thermostat to control a 2 zoned central heating system and hot water (3 MV). From what a gather you can buy the nest 3rd Generation which does HW and CH. I'd like a another thermostat that controls the CH Zone upstairs. Struggling to find a separate...
    • Ryooo
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    • Forum: Plumbing Zone
  4. D

    2 Multi boiler setup, 1 for DHW the other for CH.

    I want to have a completely separate CH boiler and DHW boiler. DHW easy enough, nothing to consider really, just plumbs to existing pipework CH option boilers are heat only or system. As I don't need the stored hot water tank, what would the setup be on either Heat only or system? What factors...
  5. N

    Can a conventional system boiler be a closed system?

    As per the title? I've only ever seen domestic system/conventional system boilers with an F&E tank and combi boilers which are closed systems. Is there any reason a system boiler cant have an expansion vessel fitted and be made a closed system? Or Is there any reason you couldn't install a...
  6. M

    Best with combi or system boiler?

    I’m after some advice. We are replacing our 21 year old Ideal Classic boiler and have been looking at the pros and cons of combi vs system boilers. House is a 3 bed detached, 9 radiators, 1 bath tub, 1 shower. Boiler is currently on an external wall and we will be looking to move it into the...
  7. L

    JG pipe on system boiler?

    I'm going to be piping up a new external Grant Vortex oil combi boiler soon and have just looked at the tank, sealed type, which has a 28mm pipe for the boiler. It's a big 5 bed house with loads of underfloor heating so I'm assuming I need to use the 28mm pipe as on the tank. Question is I have...
    • Luggsey
    • Thread
    • america boiler pipe system system boiler usa
    • Replies: 21
    • Forum: USA
  8. flapajack

    Boiler advice - can you use a system boiler on an open vent system?

    Hi I have a boiler problem I hope someone on here can help please. I currently have an open vent gravity feed system and a 10yr old boiler which is showing signs of terminal "kaputiness". The boiler is dripping consistently now (although not to bad yet) although it is still working. I am...
    • flapajack
    • Thread
    • advice america boiler system system boiler usa vent
    • Replies: 3
    • Forum: USA
  9. M

    System Boiler advice please..

    Our Alpha CD30 system boiler is approximately 12 years old and constantly giving us problems. I have since learnt that its not a great boiler – recommended by our then plumber. 4 bed house with two bathrooms, large kitchen/breakfast room, large sitting room, family room, study and utility -...
    • MarkHod
    • Thread
    • advice boiler please system system boiler
    • Replies: 14
    • Forum: Australia
  10. S

    New Ideal system boiler - Keeps losing pressure

    I had a new ideal S32 Vogue boiler installed recnenlty. Its a system boiler. So i have a hot water cyclinder with a expension vessel to it. I keep losing pressure and need to top up every few days. No visible leaks that i can see.....however the discharge pipe is letting out water when i have...
  11. R

    Vaillant EcoTEC plus system boiler - DHW control?

    Hi there, Boiler question, but nothing that contravenes gas regs. To get to the point, the Vaillant EcoTEC Plus seems to have two knobs. One has a tap symbol, the other has a radiator symbol. Even the system boiler version of this boiler has two knobs. What I cannot make out is what purpose...
  12. S

    System Boiler Advice required, please help!

    Hi All. I am refurbishing a house i recently bought. It would have 4 shower rooms and 6 vanity units in the bed rooms plus kitchen tap and a tap in utility room plus if i conver the loft into living space it need to be future proof to add one more shower room. Total radiators would be 16-17 in...
  13. J

    Rads get warm when hot water is on, SYSTEM BOILER AND MOT VALVES ARE WORKING CORRECTLY

    After some ideas, I've got a house which is installed with a system boiler, when the hot water is turned on using the programmer the radiators also get warm, checking the pipework underneath the boiler, both the how water flow and central heating return are red hot! Any ideas how to rectify...
    • JC03
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    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  14. Inverness

    Wire up a external oil system boiler

    hi guys, my sparky has let me down. I need to wire up a external grants system boiler. I've got in place 4 core inside the boiler. In the house there's is a existing programmer with a fused spur for a pump which now isn't in use anymore and a fused spur for the old boiler. There was a utility...
  15. O

    Vaillant System Boiler Q’s ...

    hello guys, I am wondering if anyone of you could tell if that makes any difference if you connect the flow and the return of the boiler the other way around on a uniSTORE unvented indirect cylinder? Just came across an installation which some builders have done. Customer is complaining that...
  16. C

    Heat only to system boiler

    Thanks to everyone for the useful info on the forum. I used to work in plumbing many years ago but things have definitely moved on a lot since then and I would appreciate some specific advice. I currently have a heat only boiler in garage with header tank in roof space. I upgraded a number...
  17. N

    System boiler replacement......

    Hi....looking to replace our system boiler (ch/hw tank set up) Was considering the ideal vogue but open to other suggestions. Have had a worcester bosch before but that was a combi Assume benefits/downsides to all brands but looking to limit the downsides Ta
  18. D

    Unvented cylinder with no system boiler?

    our client does not want a gas fired system boiler but he wants to keep his hot water storage. Its currently open vented via an old back boiler. The back boiler has been removed and electric rads installed So can we install an unvented system without a gas boiler? The cylinder to have x2 3 kw...
  19. G

    will i loose hot water pressure with a system boiler

    I only have a 15mm pipe from the water main and have been told this may be limiting if i go for a system boiler as some of the water pressure is used to fill the tank while the hot water is being used. Is this correct and would a combi boiler with a high flow rate be better?
  20. G

    Replacing a system boiler with a combi boiler

    First time using the forum so apologies if this isn't in the right place. We're planning on fitting an en suite shower room in the space where we currently have built in wardrobes and a hot water tank. Just at the thinking stage at the moment. Since there is nowhere else to move the tank to, I...
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