Forum / THE MAIN WALL / Steam Boiler Changeout- Estimating Fuel Cost Savings

## Steam Boiler Changeout- Estimating Fuel Cost Savings (17 Posts)

• ### Steam Boiler Changeout- Estimating Fuel Cost Savings

A residential customer in Seattle asked me how much would he save by changing his oil-fired steam boiler (c.1980) to a new nat. gas steam boiler. The current boiler is firing at 1gpm into an uninsulated chimney. There are 9 radiators on a 1 pipe system.Basement mains are missing 90% of insulation.
Current prices for fuel oil are \$4.20/gal and nat. gas is \$1.06/therm. I couldn't find any software that was anywhere near accurate for comparisons.What would you say?
• ### How many gallons?

How many gallons of oil do they burn? Take the gallons and multiply by 1.35 and you will get the equivalent therms.
• ### How many gallons?

How many gallons of oil do they burn? Take the gallons and multiply by 1.35 and you will get the equivalent therms.
• ### oil to gas savings

1 gallon of oil contains 140,000 btu, so cost of 100,000 btu will be \$4,20/1.4=\$3.00 per 100,000 btu
100,000 btu is 1 term. so cost of heating will go down 3/1.09 = 2.83 times

Absolute Mechanical Co. Inc.
www.highefficiencyboilersNYC.com
• ### Paul contact

me by e-mail at gastc@cox.net and give me a fax number and I will send you a little chart that will do the trick.
• ### % Efficiency

You also need to factor in the efficiency of the Boiler.This is easy to do with the attached sheet. The insulation number will require a bit of a SWAG.
Gennady is absolutely correct assuming the new boiler is no more efficient and you do not insulate.
• ### Might want to look at

a conversion burner. What make and model is the boiler?
Steam, Vapor & Hot-Water Heating Specialists

Oil & Gas Burner Service

Baltimore, MD (USA) and consulting anywhere.

Reducing our country's energy consumption, one system at a time.
• ### Existing boiler

The existing boiler is not in good shape.
The actual oil usage averages 566 gallons per year at \$4.09 gal. based on 2 years worth of bills.
I'd have recommended a conversion burner if the appliance was in better shape.
• ### 566 gallons

That's approx 780 therms.
• ### 566 gallons

That's approx 780 therms.
• ### When you replace the boiler

stay with a wet base/power burner type, for best efficiency. We use Smith 8 (the red one) and Slant/Fin Intrepid (blue one) series boilers with either Carlin EZ-Gas or Midco EC burners. Both EZ-Gas burners pictured have acoustic covers.
Steam, Vapor & Hot-Water Heating Specialists

Oil & Gas Burner Service

Baltimore, MD (USA) and consulting anywhere.

Reducing our country's energy consumption, one system at a time.
This post was edited by an admin on July 6, 2012 11:29 PM.
• ### \$1.06 a therm ?

Is that with all costs included ?  I just bought 200 gallons of oil at \$2.91 , but that price difference makes it a no brainer .
• ### Is that with all costs included ?

My latest gas bill, due July 12, 2012, is

4.22 Therms Gas        \$2.47
4.22 Therms Delivery \$2.18
Customer Charge       \$8.25

Total \$12.90.

Per therm:
\$3.0569 all in.
\$0.5853 for just the gas
\$1.1019 for gas and delivery

This is in Monmouth County, NJ.Only use is for domestic hot water indirect from my mod-con boiler. It is going up to 100F outside, so none is for heating the house. ;-)
• ### Gas Price

The price I paid for natural gas on my last bill was \$.97 a therm plus \$5.99 service charge. The service charge is the same whether I buy 1 therm or a 100 therms.
• ### out here in the West

Things are a bit different http://www.nmgco.com/Current_Natural_Gas_Rates.aspx
• ### Hi Paul,

I go with Steamhead, i wont put in a log burner for gas, only wet based oil blocks with the carlin E-Z gas, avg about 84% eff compared to 79 to 80
• ### And if you really want to increase efficiency

Insulate the pipes and fittings, and upgrade the venting.
Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.
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