Tip & How-To about Heating & Cooling
Combination boilers are called just that because they combine your hot water production and your space heating together with one boiler. The problem lies in the way that they produce hot water. To make the water hot, these boilers have a coil inside the chamber that the water for the space heating is held. The heat is transferred through the copper coil wall from the one water to the other.
The heat transfer of the efficiency of the transfer is not the problem. The problem is that you have to keep the boiler hot all of the time to make sure that you will have heat to make the water hot when you need it. To compound the problem you will find that boilers are typically very poorly insulated. The amount of heat that you will lose because of this poor insulation is unbelievable.
You have or are thinking about buying a Combi Boiler. Read this first because I will explain to you why you either have or are going to make a very big mistake.
Rather than go with this method of water heating, set up your boiler with a separate zone for an indirect water heater. Indirect hot water heaters transfer heat just as effectively, and they are usually very well insulated. The temperature drop in these indirect tanks is typically less than 1 degree F per hour. That’s not very much!
Keep in mind that even though this setup may cost you a bit more up front, that in the long run you will be saving more everyday. With the price of heating fuels going up daily you can bet that the indirect tank will pay for its self in a very short period of time.
Posted by D. Floyd... on
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