On-Demand Water Heaters for Homeowners Nelson & Small Energy Solutions
Serving New England and Upstate New York
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On-demand Units Save You Money
With on-demand you only heat water when you need it!
With old technology hot water tanks you heat and reheat water 24 hours a day:
expensive - inefficient - wasteful
"If you are tired of replacing water heaters, an on-demand system is a good choice. Both the longevity of the unit and monthly fuel efficiency save you money."
Patrick St. Ledger, Manchester, New Hampshire
On-demand Units Save You Money Year After Year
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Products
Rinnai Continuum
Rinnai 2532W External Wall Mount Rinnai 2532-FFU External Wall Mount
Rinnai 2532W External Wall Mount Rinnai 2532-FFU Internal Wall Mount

  • Propane or natural gas
  • Up to 8.5 gallons per minute. Can handle up to 3 simultaneous uses, such as a shower, dishwasher and washing machine.
  • Up to 87% efficiency
  • No pilot light, no indoor combustion
  • Digital touch control lets you preset water temperature. Add more controls at individual faucets to customize water temp for each use. Great safety feature for kids.
  • 24" height, 14" width, 9" depth
  • 10 year warranty on heat exchanger
  • Typical payback: Unit pays for itself in 2-3 years
  • Manufacturer suggested list price plus installation (will vary depending on plumbing and venting options): $1,265 not including installation. See your dealer for details.
Toyotomi
 Toyotomi

  • #2 home heating oil; the most cost effective way to heat hot water. Readily taps into existing oil tank.
  • Direct vent through an external wall or vented into a chimney
  • Small footprint
  • 6.1 gallons per minute
  • 88% efficiency
  • State-of-the-art safety features
  • 27.75" height, 12 5/8" width, 22.5" depth
  • Kerosene unit is mobile home approved
  • Long lasting stainless steel heat exchanger
  • Typical payback: Unit pays for itself in 2-3 years
  • #2 home heating oil unit - Manufacturer suggested list price plus installation (will vary depending on plumbing and venting options): $1,259 not including installation. See your dealer for details.
  • K-1 kerosene unit - Manufacturer suggested list price plus installation (will vary depending on plumbing and venting options): $1,219 not including installation. See your dealer for details.
Detailed Cost Comparison

This family replaced a failing 40 gallon electric hot water heater with an on-demand Rinnai Continuum propane water heater. They chose the propane model since they already had propane gas service to the house. The Rinnai has an expected life of 15 to 20 years; hot water tanks are expected to last 3 to 6 years.

On-demand Electric hot water tank Quick-recovery oil hot water tank
Cost of unit $1265 $170 $1300
Installation cost (labor + materials) $240 $250 $180
Fuel costs for 20 years $7,644 $14,102 $5,520
Replacement unit & installation cost after 6 years NA $445 $1,568
Replacement unit & installation cost after 12 years NA $472 $1,662
Total costs for 20 years $9,149 $15,940 $11,994
Savings after 6 years   $1,298 $907
Savings after 20 years   $6,791 $2,845

Assumptions these calculations are based on

One On-Demand Unit Equal 3 or More Traditional Hot Water Tanks
Typical life of on-demand unit - 15-20 years
Typical life of electric hot water tank

 How it works
  • Turn on faucet
  • Burner turns on
  • Water passes over heat exchanger coils
  • Hot water comes out in less than 1 second
How it works graphic

Benefits
  • Produces hot water for up to 3 simultaneous uses
  • Few moving parts to break down
  • Won't corrode and silt up like a tank heater