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Heating oil is any petroleum product or other oil used for heating; a fuel oil. Most commonly, it refers to low viscosity grades of fuel oil used for furnaces or boilers use for home heating and in other buildings. Home heating oil is often abbreviated as HHO.Most heating oil products are chemically very similar to diesel fuel used as motor fuel; motor fuel is typically subject to higher fuel taxes. Many countries add fuel dyes to heating oil, allowing law enforcement to check if a driver is evading fuel taxes. Since 2002, Solvent Yellow 124 has been added as a "Euromarker" in the European Union; untaxed diesel is known as "red diesel" in the United Kingdom.
Heating oil is commonly delivered by tank truck to residential, commercial and municipal buildings and stored in above-ground storage tanks ("ASTs") located in the basements, garages, or outside adjacent to the building. It is sometimes stored in underground storage tanks (or "USTs") but less often than ASTs. ASTs are used for smaller installations due to the lower cost factor. Heating oil is less commonly used as an industrial fuel or for power generation.
Leaks from tanks and piping are an environmental concern. Various federal and state regulations are in place regarding the proper transportation, storage and burning of heating oil, which is classified as a hazardous material (HazMat) by federal regulators.

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  1. B

    No heating to one zone

    So I have a vaillant combi boiler. 2 zones with a valve each controlled by Nest system. When my Nest calls for heat zone one opens up and I have hot flow to manifold, pipes thus hot radiators. When the other Nest calls for heat zone 2 valve opens up hot flow to manifold but no hot...
    • Bushman
    • Thread
    • central heating system forum heating no heating plumbing zone
    • Replies: 7
    • Forum: Plumbing Zone
  2. D

    Old system playing up

    Hi all I'm new here so thanks in advance, I have an old Netaheat boiler set up (gravity fed) which failed to fire up for central heating last week, I have set the three way diverted valve to manual and have been using the "call for hot water" to heat the radiators (once its been on for half...
  3. T

    Combi boiler, hot water but no heating

    i have an Ideal Espirit 2 boiler, the water is working perfect but the heating is not working. We had a new pump fitted about 12 months ago, I've had three tradesman in and they have all said sometime different; one said I needed a new pump the other said I needed a new programmer and the...
  4. T

    icos he15, no heating

    hi, we have a problem with are heating, when it is switched on nothing happens, we have a Honeywell st9400c programmer and just set to to continuously when we want heating on, the light comes on but nothing is happing at the boiler, we can switch it to heat water and the boiler fires up straight...
  5. G

    Potterton Prima F50 Boiler won't stop igniting but no heating or hot water

    Hi all, I hope this is the right category. I woke up this morning in a cold house with no hot hot either. (It's a rent flat). My boiler Potterton Prima F50 is continuously running, I can see fire inside, it's making the usual noise apart of that gurgling water noise. I checked the...
    • GeorgeN
    • Thread
    • boiler central heating system hot hot water no heating oil potterton water won't
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  6. D

    ICOS HE15, TADO, hot water only absolutely no heating though

    Would really appreciate thoughts We have an ICOS HE15 (now nearly 9 years old - installed in new build), I installed a tado v1 about 4 years ago, and just upgraded to the v3 model 2 weeks ago. All worked at first, but now I have absolutely no central heating whatsoever. I do have hot water...
  7. R

    Worcester 28i rsf has hot water but no heating

    Hello people went to a boiler break down today, it was a worcester 28i rsf combi boiler. Boiler hot water output was fine. But no central heating. turn heating demand on fan runs, pumps runs, but no ignition. No lock out light flash. Checked overheat stat on top of the boiler has continuity...
  8. Super Mario

    Vailaint ecotech plus no heating

    Hot water fine no heating calls for demand from thermostat temperature goes up to 42 thans comes back down any ideas im thinking it needs a flush?
  9. A

    No heating...

    We have a Gloworm boiler and a Boilermate2000 up at the top of the house; a workman put a hole in a pipe today (tucked in the corner of the house no less) for hot water. This meant a good 90 minutes of the water going everywhere until it drained away. Plumber arrived and fitted a compressor to...
  10. G

    Stumped! Hot water but no heating...

    Hi, I have a Worcester Bosch Greenstar 24i system, installed in 2009 with a megaflop indirect cyclinder. The primaries are 28mm, split into a 28mm 2-port for heating and a 22mm 2-port for hot water. The 28mm 2-port for CH was changed and is wired correctly. The issue is if the hot water is on...
  11. Super Mario

    Ideal mini c24 no heating hot water ok

    No heating but dhw ok divertor valve?
  12. S

    Ideal isar No Heating

    Hi People, Im new to this site so be nice!! Ive been working on a Ideal Isar 24 today (Not a favoute of mine) the hot water is working fine but when stat/timer are calling for heat all i get on the dispaly is c and flashing burner No fault code. I have tryied replacing the PCB but still the same...
  13. M

    Ideal Isar 30HE - No Heating

    Hi, I attended a job with no heating but perfect hot water. When heating is selected status goes to 'c' and burner goes solid on for about 20 seconds then goes to flashing. No fault codes. I initially suspected the diverter but oddly the flow pipe from the boiler is roasting and the return...
  14. P

    Halstead(i get all the best jobs haha) ace high - hot water is fine, no heating....

    Hi Guys, I thought I would be best off asking for this one in lieu of the wealth of advice on here. I have a landlord with a halstead ace high combi, boiler fires and stay on all appearing to run fine, no noise, no over expansion. However when heating is switched on pump runs, fan runs...
  15. K

    Potterton Performa Eco 24 HE hot water fine but no heating

    Hi all, Last night we tried to turn on the heating for the first time this autumn and it turns out it is not working. The hot water works fine, the flame comes on periodically to heat it even when not in use, but the radiators are completely cold, no hot water is coming out their way. Do not...
    • kkd
    • Thread
    • eco flame heating hot hot water no heating please potterton radiators tried water
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  16. sammathias

    Worcester 24i RSF no heating

    Just a quick one guys. Went to a worcester 24i rsf the other day on a breakdown. Basically it has hot water but doesn't fire up on heating.... however if you run the hot tap prior to turning on heating then turn hot tap off. boiler stays fired up on heating. I gave it a good service as it hadnt...
  17. 3

    Remeha avanta plus 28c, hot water but no heating

    Hi Ive been called to look at a remeha avanta plus 28c with hot water working fine just no heating. No fault codes are showing up at all. Is there anyway of checking the motorised valve or the divertor as im not that familiar with these boilers apart from having to change the seals and ignition...
  18. U

    Hot water plumbed backwards now no heating

    Hi all, right, so, please help a man out here :-) my plumber for some unknown reason whilst plumbing the kitchen in that we have just fit confused the hot feed from the boiler and put a cold feed onto it...... the heating was working fine and as normal, until... my heating guy came out...
  19. O

    HELP! No heating. Salus RT500RF

    Having problems with above mentioned thermostat. Been running with no issues for 10 years. A jumper fell out today from the back of the control unit, and I must've replaced it incorrectly as when I opened the receiver later on to troubleshoot, I saw that they weren't corresponding. I only...
  20. M

    Vaillant ectotec plus 824, hot water but no heating.

    Hi all. I'm a bit stumped with regards to a repair I've been called out to.
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