Q:Almost 10 years old, had various parts recently replaced, but working ok. Come back from trip away for 4 days (heating switched off and no hot water used) and found a big puddle underneath. Is this the end of it?. Thanks...

if the puddle is not getting bigger then it could of just been a relief valve dumping ! maybe pressure surge or something of that nature ! clean the water up and see if it still leaks, when you turn it off it cools and you get contraction , i would fire it back up and check it but i think your ok

Q:I am piping out a hot water condensing boiler that has its own boiler loop and circulator pump aside from the heating system loop and circulator pump. The manufacturer supplied a recommended circulator pump for the boiler loop which is sized for 50 ft. of equivalent length of pipe. The instuctions go on to say that it may require a higher flow circulator pump if you pipe it out more that 50 ft. of equivalent length of pipe. It then gives a chart of how much each fitting and valve is equal to as a length of pipe. My question is, do i size the circulator pump just based on the fittings and valves equivalent length, or do i also add up the amount of actual pipe in between each fitting and valve to come up with the amount?Please help, im not understanding this.

The pump they supplied for the boiler loop will be sufficient for most applications, but the building loop pump will have to be calculated. They are two separate systems even though they are connected together with a Decoupler loop. You convert all the fittings to equivalent length of pipe, and then add that number to the actual length of pipe in the system. This is used to find the resistance to flow in the system. In some cases, where the pump is almost large enough, the diameter of the pipe and fittings can be increased a size to reduce the friction losses. Call the manufacture for Tech support if possible.

Q:What will happen if my boiler pressure is below 12 psi?

You haven't said the make and type of boiler. But I assume it's a combi. If it is you either omitted the decimal point or got the format wrong as combis display in bar not psi. So, most combis should be set at 1.0 bar or just above in the COLD state. If it drops to less than about 0.5 bar the boiler will not fire for safety reasons. When the boiler runs, the pressure shown will rise considerably. This is quite normal. Hope this helps.

Q:I have an oil fired boiler. I want to run Waste vegetable oil in it. What do I need to do to do these?

You need to change the vegetable oil into bio-diesel.

Q:Less than half of the rooms in our home are not heating. We have Radiators in each room. The system is a Hydrotherm boiler. The pressure is good at twelve to thirteen pounds and the heat is at 180 degrees. when bleeding the radiators, even the few that are warm do not flow out any water. The hot pipe coming out of the boiler is warm for twelve feet and then the further up you go, it gets cooler. I am thinking the circulating pump or the impeller? It seems like the water is not gettting to the radiators. It is flowing, just don't know how much volume. Any suggestions on what is going on or solutions would be great.

I would have a heating contractor come and check your circulator pump and expansion tank. A defective pump could cause your problem. Also, if you have an old or defective expansion tank, air can be introduced into the system that way, so when you bleed out the air, the water recirculates the system and picks up more air from the tank and you will never get ahead.

Q:Just wondering before we bother our landlord with the query, if it is something we can fix?The water is kind of warm, but temp drops suddenly, we have a hunch that this is because the pressure on the boiler is showing below 1. Any ideas on how to sort this one out?

There should be a valve which supplies water to the boiler. Look underneath the boiler, it will be connecting two pipes, probably flexible braided pipe with the valve. Open the valve and watch the pressure increase. Close it when it gets just above 1 bar. Be careful as after a short while the pressure will jump up quickly, and you don't want too much water (too much pressure) in. Try that and if it doesn't work you'll have to get your landlord to get a gasman in.

Q:I have a door seperating a room and boiler room. There are no windows so i can i make a hole and exhaust all the hot air to there

I'm afraid your question is unclear. If you're asking whether you can exhaust your boiler directly into the space, the answer is NO. You will die if you do. Maybe not die, but it's an incredibly dangerous thing to try, even if the space doesn't actually open onto your living space. Combustion gases could migrate up to the living space and cause significant health effects or death. If you're asking whether you can exhaust an air conditioner directly into a room, maybe. The AC only generates hot air, but it needs cool (cooler than the exhaust, anyway) air to do its thing. If the AC is a small one and the room decently large, you can condition a small space in your basement even though there isn't any other AC down there. I have an office like that. It's a plywood shack in the basement of the shelter; a small window unit keeps the shack a decent temperature, but the rest of the basement becomes uncomfortably warm all summer. Fortunately, the rest of the basement is just storage and no people, so it's not a big deal. So if you're asking about the AC and don't mind the rest of the space down there getting kinda hot, it would be okay. But let me reiterate: YOU CANNOT EXHAUST YOUR BOILER INDOORS. [edit] Somebody came through and gave down thumbs, but left no input of their own. Thank you for nothing, troll. Go away now. Or better yet, exhaust your boiler indoors.

Q:Boiler water level and drum water level What is the difference

The boiler drum water level is an important parameter to ensure safe production and the provision of quality steam. This is especially true for modern industrial production because one of the salient features of modern boilers is the significant increase in the amount of steam, the relative reduction in the volume of the mix,

Q:If the fan is broken, would the heating and hot water still work?

check an see if there current to the fan

Q:How does one size a boiler for a house?

USA Scott has the right answer. It is called a heat loss calculation. You calculate the amount of heat your house will lose, then you install a boiler that will replace that amount of heat. Heat loss is figured one room at a time. Information needed is the size of the room, height of the ceiling, type of wall construction, what R value of insulation, how many and what size doors and windows. This is done for each room, then added up for the whole house.