Sent: Friday, February 07, 2014 5:22 PM 

To: commercial_packaged_boilers 

Subject: DOE Requests Information for Commercial Packaged Boiler ~ Energy Efficiency 

Good day DOE 

I look at the performance ratings of all these boilers, and I have to ask ~ How many grades of 

natural gas do we have in America? 

If the residential market has it's high efficiency natural gas water heaters and furnaces and 

condensing boilers, why does the commercial natural gas appliances get away with being 70% to 

80's% energy efficient? 

America and the world is in a battle with Climate Change. It's time to get serious and bring up 

the standards. 

It is even more important when dealing with the industrial natural gas consumers. 

Natural gas can be consumed to mid 90% energy efficiency. 

The 3 main items of Climate Change that need to be addressed are: 

1) Reduce Global Warming 

2) Reduce CO2 Emissions 

3) Conserve Water 

All 3 items are addressed by Increasing Natural Gas Energy Efficiency. 

If the appliance is 70% or 80% energy efficient it doesn't always work to just replace the boiler 

with a Condensing Boiler, because the whole buildings space heating system has to be redone in 

order to make this new high efficiency condensing boiler operate as a condensing boiler. 

With a Condensing Economizer alongside the conventional boiler, only a portion of the buildings 

space heating requirements has to be converted to make the boiler operate as efficiently as the 

condensing boiler. There could be the option of heating the domestic water, or at a hotel or 

university, using the recovered heat energy to heat the swimming pools. 

What needs to be done today is to "look over the edge of the box". There are ways to make these 

things happen. 

It's not about today or this year, but we have to be planning for the next 20 to 100 years. 

Your agency states that for every 1 million Btu's of heat energy recovered from the exhaust of 

these natural gas appliances, and this recovered heat energy is utilized in the building or facility, 

117 lbs of CO2 will NOT be put into the atmosphere. This is big compared to electricity 

measures. This is going after the "meat & potatoes" instead of the low hanging fruit. 

If the building has a chimney poking out of the roof venting hot (over 200 F) exhaust, this should 

be investigated - Why. Exhaust temperatures in a properly designed system can at times in the 

summer be cooler than the outside air temperature. Mass Cooling? 

There is water in combusted natural gas, and during this condensing flue gas heat recovery 

process, this water is being created. This distilled water is very usable. Do not waste the water. 

Have you ever seen combusted natural gas irrigate the lawns and flower beds? 

This water can be injected into a buildings sanitary water lines. 
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