Archive for August, 2009
Wait, What Are We Heating Again?
Someone asked me the other day why I’m only writing about air heaters. Their water heater burns natural gas and I ought to be talking about those as well.
While this person’s state was in accurate, I do take their point. Natural gas bruning water heaters are the most common way to provide hot showers in the United States. Mea culpa. I oughtn’t be so neglectful because I value those hot showers more than a warm house, probably! But the truth is I find the area kind of, well, boring. There aren’t nearly so many different options concerning water heaters as there are people heaters. Go find some other blog if you want to talk about them, we’re sticking to the sexy stuff here.
Back to the inaccuracy I mentioned, though. I haven’t really been talking about air heaters at all, I’ve been talking about people heaters. It is true that many gas heaters acheive their people heating goal by heating air that then gets moved around (this is called convection heating). Central air heating is an obvious example of this and so are space heaters that have electric blowers attached to them. But many heaters don’t rely on heating the air at all. Remember the post about outdoor gas heaters? Right. Radiant heaters. And radiant heaters work indoors as well. Indoor space heaters that are only designed to heat a smaller area can operate soley radiant heat. The nice thing about them is that they are quiet. All you can hear is (sometimes) the gentle hiss of gas flowing to the burner and the pleasant pings of the metal pieces expanding and contracting.
I suppose you could consider gas ranges and ovens to be food gas heaters too if you really want to be pedantic about it!
Central Indoor Gas Heaters
Gas is the most common heating fuel for central-heating gas systems, and for good reason! It is efficient (modern gas heaters approach 100% efficiency!), economical, and effective.
Central air heating systems differ from ‘local’ indoor space heaters in that instead of the heat being generated in the place it is desired, it is generated in one central location within the building. In your home, this is generally going to be the furnace in your basement. Air heated in the furnace is then blown through a series of ducts to all of the rooms in the house to be heated. In the simplest case this results in all rooms in your home being delivered the same amount of heat, though in more complicated (and expensive) systems the home can be divided into zones and the amount of heat delivered to each zone can be independently controlled.
Though central gas furnaces can be incredibly efficient in their own right, sometimes this isn’t the most efficent heating method available. For example, if you’re entire family is in the den watching movies for the whole night, it might make a lot more sense to use space heater rather than “efficiently” heat your whole home.
That said, though, central heating is often the way to go since you will have different people throughout the house and keeping the entire living space at a more constant temperature is easier as well as more comfortable. With central heat you don’t need to worry about putting on extra clothing when you leave the warm comfortable room or dragging that space heater into the next room with you.
Obviously, though, the infrastructure required for central heating is quite signficant and most homes will have it installed at the time of construction, though certainly if the duct work exists adding a furnace to your home is something that any heating contractor would be able to handle.
If you already have a gas furnace and find that your heating bills are expensive you should consider upgrading to a more efficient model. Newer furances can provide a lot more heat while burning a lot less fuel. Tax credits are available to soften the immediate blow of the new purchase and in the long run you can definitely see huge savings. Not to mention you get the fuzzy feeling of knowing you are contributing to less global warming.