Confidence votes 10.3K. The mass of an object is how much matter is contained within that object. The SI unit of measure for mass is the kilogram. The word mass should be used instead of the term 'weight', which suggests the force of gravity acting upon the object.
1 Installing a standard boiler (80%-85% annual fuel utilization efficiency) typically costs about $2,500-$5,000 for a gas-fired model and $3,000-$6,500 for an oil-fired unit (generally used in areas without municipal gas lines).
Plumbing prices for boiler service. It is important to have your boiler serviced once a year to reduce the risk of carbon monoxide poisoning and the boiler breaking down at an inappropriate time of year-when its most used, the winter.These are the total costs that people have paid for getting a plumber to come round and service their boiler for them.t is important to have your boiler serviced once a year to reduce the risk of carbon monoxide poisoning and the boiler breaking down at an inappropriate time of year-when its most used, the winter. These are the total costs that people have paid for getting a plumber to come round and service their boiler for them.