Posts Tagged ‘modulating’

Boilers Part 13 – The Heating Cycle With Outdoor Reset

November 21, 2010

Today I will illustrate the heating cycle with outdoor reset.

Your thermostat is set for 70 deg. F. The temperature drops to 69 degrees and the boiler fires up. Based on the outside temperature of 50 degrees, your boiler reset controller determines that a water temperature of 100 degrees will provide the right amount of heat. The boiler starts heating your water until it reaches 100 degrees. Your home heats up to 70 degrees and the boiler shuts off, but the temperature doesn’t go up higher because your radiators are only 100 degrees. In order to maintain 70 degrees in your home, tha radiators must stay at 100 degrees so they will never cool down. Rather, they will stay at 100 degrees and maintain your exact set point of 70 degrees in your home. How efficient, How comfortable? As it gets colder outside, your boiler will automatically adjust the water in your system hotter and hotter to meet your exact heating needs. Imagine how comfortable it will feel in your home without temperature fluctuations? Imagine how quiet your system will be without the constant noise of your pipes expanding and contracting as they heat up and cool down. But most of all, imagine how much energy you will save due to this operating efficiency.

See this video to learn more about outdoor reset.

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Boilers Part 11 – Reset

November 16, 2010

Today we will discuss RESET. Reset is the ability of a boiler to change the water temperature in your radiators to meet your specific heating needs in real-time as the outdoor temperature changes. A standard boiler will typically keep your radiators at 140 degrees Fahrenheit. On really cold days, this is great. For milder days however, your radiators don’t need to be so warm. When it is just a bit cool outside, 90 degree Fahrenheit radiators would be enough. As it gets colder outside, your radiators would need to warm up to keep your house warm. A boiler with the Outdoor Reset feature will constantly measure the temperature outside and adjust your water temperature to give you just the right amount of heat. Now that’s what I call efficient.
In my next post I will illustrate the typical heating cycle without outdoor reset.

The following video is a great simulation of what happens in my favourite DVCB, the Triangle Tube Prestige during a heating cycle. Check it out!

Boilers Part 9 – Modulating/Condensing Boilers – Operational Efficiency

November 11, 2010

Proud of a great furnace install.

The energy savings of a condensing boiler is compounded by its operating efficiency. Operating efficiency means that the boiler operates in such a way to maximize savings and reduce energy consumption due to this special sequence of operation. This is all in addition to the fact that its combustion efficiency is high. There a several ways in which the modulating condensing boilers offer operational efficiency and depending on which boiler you select, you will benefit from some or all of these operational advantages.

  1. Modulation.
  2. Reset
  3. Low water temperature operation.
  4. Turndown to support zoning.

In my next few posts, I will elaborate on these operational efficiencies and explain them in detail. Please feel free to ask a question if you require additional information.

Boilers Part 8 – Combustion Efficiency

November 9, 2010

Today I will discuss Combustion Efficiency.

Combustion Efficiency is the percentage of heat you get from your fuel. For instance, if your boiler has a combustion efficiency of 70%, you are getting 70 cents of heat for every dollar of gas that you are paying for. The rest of the heat is going right up the chimney. This is why you can burn your hand when you touch the hot chimney of a 70% efficient appliance. You are feeling the heat that is being wasted right up the chimney.

If you think about it, you are getting burnt even if you don’t touch the chimney because you are losing/wasting so much energy.

Compare this to a DVCB which has a 95% combustion efficiency and you will see that you are getting 95 cents for every dollar in fuel used. This is a great savings of almost 30%. If you feel the vent of a condensing appliance, it is just a bit warm because you are extracting 95% of the heat from the flu gases before you send them out the vent.

With today’s high energy prices and our concern for the environment, it is a crime not to invest in a DVCB.

Boilers Part 7 – DVCB – The Most Efficient

November 7, 2010

The second advantage of choosing a DVCB (Direct Vent Condensing Boiler) is that it is the most efficient type of boiler. It is likely that when you replace your old boiler with a DVCB, properly sized installed and set up by a trained and professional contractor, you will save 40% on your fuel consumption. This savings is quite significant and would in almost all cases justify the additional investment even without considering the other many advantages of a DVCB.
In this post, I would like to explain where these sharp savings are achieved.

There are 2 types of efficiency.

  1. Combustion Efficiency
  2. Operational Efficiency

In my next post I will explain combustion efficiency.

Boilers Part 5 – Direct Vent Condensing Boilers

November 3, 2010

Hello,
Today we will discuss the best type of boiler for your home. I say the best because it is
1. The Safest
2. The Most Efficient
3. The Most Versatile
4. The Most Compact
5. The boiler that will deliver the greatest comfort.

The Direct Vent Condensing Boiler.

There are so many DVCB’s to choose from so I will dedicate the next posts to the many options, features, pitfalls, and concerns you should be aware of when selecting the right boiler for your home.

Below is a photo of a compact DVCB system that we installed.

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