Twenty-five year warranties and limited lifetime warranties are common on cast iron boilers. Even with stainless steel construction, the acid produced during the condensing process in high efficiency models will shorten the expected lifespan. Most warranties are for years. Chances are you will be replacing a stainless steel boiler while a cast iron model is still going strong. Bottom line If energy efficiency, a smaller carbon footprint, is important to you, then by all means go with the high-efficiency stainless steel boiler.
Unlike conventional systems, combi boilers do not store domestic hot water. They heat water from the cold mains directly even as you use them. With combi boilers, you do not have a hot water cylinder, loft tank, or pipework. Combis are like standard unvented boilers but they have a second heating circuit, which is what gives you the instant hot water whenever you need it. If fed directly from the main water supply to the heat exchanger, the combi boiler can have an unlimited hot water supply as long as the boiler is firing.
Combination boilers are sometimes preferable because they eliminate some of the requirements of conventional vented heating systems. All the parts of a combi are in a single unit, making it very easy to install. If there is more than one bathroom, it is better to have storage systems. The standard combi boilers heat water in about 40 seconds.
Some combis control the flow of water until it is hot enough. Storage combis can store some hot water permanently. According to a Green Affordable Housing Coalition report which is no longer available online , combination water and space heating systems can reduce utility costs by 15 percent or more compared to standard installation of separate furnace and water heater systems.
Condensing combination boilers are condensing versions of the standard combination boiler and are more efficient, giving you the advantage of a combination boiler as well as a condensing boiler. They can replace an existing combi boiler. The answer to this question varies from homeowner to homeowner. Here are some issues to consider:.
If you are not price-sensitive, then a high-efficiency boiler is a great choice. See ratings and reviews for the best in furnaces, air conditioners, heat pumps, boilers and more. A good boiler can heat your water to a great temperature, and, then, it can heat your home efficiently. There are different kinds of boilers to choose from.
There are two types of efficiency boilers. The government determines efficiency by how much fuel boilers use to heat your home and water. Companies use fuel efficiency ratings to determine whether a boiler is standard-efficiency or high-efficiency. Fuel efficiency ratings also tell you about how much a boiler will cost to operate during the year.
This will give you an idea of the cost of your boiler over time. A standard-efficiency boiler means the boiler has an efficiency rating between 80 percent and 84 percent. Usually, standard-efficiency boilers have a heat exchanger made of cast iron, and they vent through the chimney. Sometimes you can find a standard boiler that is either direct-vented or power-vented.
Direct-vented means the boiler directs the gas to the outdoors through a pipe in your house. Power-vented means a blower or fan pushes the air out of your house.
The best thing about a standard boiler is that it is cheaper than a high-efficiency boiler. Replacing Your Furnace or Boiler. Maintaining Your Furnace or Boiler. The following maintenance should be provided by a heating system professional. All systems: Check the condition of your vent connection pipe and chimney. Parts of the venting system may have deteriorated over time. Chimney problems can be expensive to repair, and may help justify installing new heating equipment that won't use the existing chimney.
Check the physical integrity of the heat exchanger. Boiler heat exchangers may leak water and are easy to spot. Furnace heat exchangers mix combustion gases with house air when they leak—an important safety reason to have them inspected. Combustion gases leaking into the house can cause carbon monoxide poisoning. It is suggested that ever home have a working carbon monoxide alarm. Adjust the controls on the boiler or furnace to provide optimum water and air temperature settings for both efficiency and comfort.
If you're considering replacing or retrofitting your existing heating system, have the technician perform a combustion-efficiency test. Forced Air Systems: Check the combustion chamber for cracks Test for carbon monoxide CO and remedy if found Adjust blower control and supply-air temperature Clean and oil the blower Remove dirt, soot, or corrosion from the furnace or boiler Check fuel input and flame characteristics, and adjust if necessary Seal connections between the furnace and main ducts.
Hot Water Systems: Test pressure-relief valve Test high-limit control Inspect pressure tank, which should be filled with air, to verify that it's not filled with water Clean the heat exchanger.
Steam Systems: Drain some water from the boiler to remove sediments and improve the heat exchange efficiency Test low-water cutoff safety control and high-limit safety control Drain the float chamber to remove sediments, which will prevent the low-water cutoff control from sediment clogs Analyze boiler water and add chemicals as needed to control deposits and corrosion Clean the heat exchanger See also steam radiators.
These mid-efficiency appliances have a greater risk of depositing acidic condensation in chimneys, and the chimneys must be prepared to handle this corrosive threat. The new chimney liner should be sized to accommodate both the new heating appliance and the combustion water heater if present by the installer. In this case, the heating appliance will no longer vent into the old chimney, and if the combustion water heater is present it will now vent through an oversized chimney.
0コメント