Heating, Boiler Service and Replacement
BOSCH GREENSTAR CONDENSING BOILER
The most efficient type of natural gas boiler is the condensing boiler. A standard natural gas type boiler without condensing will lose much of its heat to exhaust which goes right up the chimney, so you are pretty much throwing money right out of your chimney.
With a high efficiency condensing boiler, more of the heat produced during combustion is transferred to water in the boiler by way of condensation of the water vapor produced during combustion.
This latent heat recovery can allow boilers like the Bosch Greenstar Models to have efficiencies of 95% AFUE (annual fuel utilization efficiency).
REBATES for Bosch Greenstar Boilers
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Tips from the heating experts
- Lower the temperature on the thermostat at night and when nobody is home, or have a programmable thermostat installed. Lowering the temperature just a few degrees at times when you are not home can decrease the load on your heating equipment drastically which will save fuel and money.
Of course, do not lower it too much as cold breezy nights would be more likely to cause frozen pipes with the thermostat set lower. A typical safe range is between 60-65 degrees F.
On older houses where the insulation is poor a higher temperature may be needed to prevent freeze ups on especially cold nights. *All houses are different and Pespisa Company has no way of guaranteeing your house and pipes will not freeze with the thermostat set at any temperature suggested by anyone.
- Make sure the storm windows are closed when the heat is on. Out of an entire house the heat-loss through the windows is typically the greatest. The reason for this is the easy path which the heat takes to pass though the windows. The first path is through any cracks or seals which are not tight. The second path is the warm air on the inside of the house touches the window.
The inside air touching the window transfers some of its heat to the window glass. As the air cools down it becomes more dense and descends down the window pane. The inside air which is now flowing down the window pane in turn transfers heat more quickly by means of natural convection to the window glass. Glass being a pretty good conductor of heat transfers this heat to the cold outside air which if the wind is not blowing is creating a natural convection of its own on the outside of the glass, and if the wind is blowing the heat is being transferred even more quickly by forced convection.
What does this all mean? When you have the storm windows down or double-pane glass, there is an extra buffer of air in between 2 panes of glass which makes the transfer of heat slow down. Air turns out to have a very low heat transfer coefficient, or in other words, it does not transfer heat well compared to solid objects. So this buffer of air slows down this heat loss through the windows greatly especially if the air buffer is not large enough to allow for natural convection, which is the transfer of heat through the movement of the air over the glass caused by changes in local air density.
- Have your boiler tuned and inspected to insure proper operation. Many new condensing boilers have a air/fuel adjustment on them which requires fine tuning upon installation. In order to properly tune these boilers for exhaust levels or CO, O2, and CO2 a combustion analyzer is required. Although all high efficiency boilers should be tuned upon installation, not all heating company's have the required tools to do so (Pespisa Company tunes all high efficiency boilers with a combustion analyzer.)
If a regular style gas boiler is creating an abnormal amount of soot around its burners and the draft hood, it may be a sign of improper combustion which leads to high carbon monoxide levels in the exhaust and possibly the house. It could also mean that the boiler is not drafting properly which similarly could lead to dangerous CO levels in the house.