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Natural Gas Booster Heaters
Shared Savings financing
Project paybacks
Advantages of natural gas
- Cut operating costs 60% to 80%
- Reduce labor costs
- Decrease equipment wear and tear
- Minimize environmental effects
Potential savings
Use the chart below to estimate your savings of using natural gas over electricity for your
booster heater.
- Find the kW rating of the electric booster heater (found on the equipment nameplate).
- Estimate the weekly operating hours for the dishwasher.
- Find the annual energy cost savings.
Example: Replace a 24-kW electric booster water heater on a dishwasher that operates 80
hours per week and save $2,003 annually. The payback can be less than two years.
Savings chart
Natural gas booster heater savings projections
ANNUAL ENERGY SAVINGS ($) |
Electric
heater
kW |
Dishwasher operating hours per week |
| 40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
85 |
90 |
95 |
100 |
105 |
110 |
4 |
167 |
188 |
209 |
230 |
250 |
271 |
292 |
313 |
334 |
355 |
376 |
396 |
417 |
438 |
459 |
5 |
209 |
235 |
261 |
287 |
313 |
339 |
365 |
391 |
417 |
4443 |
470 |
496 |
522 |
548 |
574 |
6 |
250 |
282 |
313 |
344 |
376 |
407 |
438 |
470 |
501 |
532 |
563 |
595 |
626 |
657 |
689 |
7 |
292 |
329 |
365 |
402 |
438 |
475 |
511 |
548 |
584 |
621 |
657 |
694 |
730 |
767 |
803 |
9 |
376 |
423 |
470 |
516 |
563 |
610 |
657 |
704 |
751 |
798 |
845 |
892 |
939 |
986 |
1033 |
12 |
501 |
563 |
626 |
689 |
751 |
814 |
876 |
939 |
1002 |
1064 |
1127 |
1189 |
1252 |
1315 |
1377 |
13.5 |
563 |
634 |
704 |
775 |
845 |
916 |
986 |
1056 |
1127 |
1197 |
1268 |
1338 |
1409 |
1479 |
1549 |
15 |
626 |
704 |
783 |
861 |
939 |
1017 |
1096 |
1174 |
1252 |
1330 |
1409 |
1487 |
1565 |
1643 |
1722 |
17.2 |
718 |
808 |
897 |
987 |
1077 |
1166 |
1256 |
1346 |
1436 |
1525 |
1615 |
1705 |
1795 |
1884 |
1974 |
18 |
751 |
845 |
939 |
1033 |
1127 |
1221 |
1315 |
1409 |
1502 |
1596 |
1690 |
1784 |
1878 |
1972 |
2066 |
24 |
1002 |
1127 |
1252 |
1377 |
1502 |
1628 |
1753 |
1878 |
2003 |
2128 |
2254 |
2379 |
2504 |
2629 |
2754 |
27 |
1127 |
1268 |
1409 |
1549 |
1690 |
1831 |
1972 |
2113 |
2254 |
2395 |
2535 |
2676 |
2817 |
2958 |
3099 |
30 |
1252 |
1409 |
1565 |
1722 |
1878 |
2035 |
2191 |
2348 |
2504 |
2661 |
2817 |
2974 |
3130 |
3287 |
3443 |
36 |
1502 |
1690 |
1878 |
2066 |
2254 |
2441 |
2629 |
2817 |
3005 |
3193 |
3380 |
3568 |
3756 |
3944 |
4132 |
39 |
1628 |
1831 |
2035 |
2238 |
2441 |
2645 |
2848 |
3052 |
3255 |
3459 |
3662 |
3866 |
4069 |
4273 |
4476 |
45 |
1878 |
2113 |
2348 |
2582 |
2817 |
3052 |
3287 |
3521 |
3756 |
3991 |
4226 |
4460 |
4695 |
4930 |
5165 |
54 |
2254 |
2535 |
2817 |
3099 |
3380 |
3662 |
3944 |
4226 |
4507 |
4789 |
5071 |
5352 |
5634 |
5916 |
6198 |
58.5 |
2441 |
2747 |
3052 |
3357 |
3662 |
3967 |
4273 |
4578 |
4883 |
5188 |
5493 |
5798 |
6104 |
6409 |
6714 |
Footnotes:
- Savings calculated as a comparison with electric booster heaters.
- Energy costs are assumed to be 8 cents per kWh and 45 cents per therm.
Madison restaurant savings example
Madison Area Restaurants - Potential Savings
Location |
Dishwasher
operating time |
Electric annual operating cost |
Gas annual operating cost |
Electric-to-gas savings |
Site 1
Hotel |
12 hours/day
7 days/week
(84 hours) |
54 kW heater:
$5,528 |
$1,138 |
$4,390
(79%) |
Site 2
Hotel |
12 hours/day
7 days/week
(84 hours) |
45 kW heater:
$3,977 |
$684 |
$3,293
(83%) |
Site 3
National chain restaurant |
13 hours/day
5 days/week &
14 hours/day
2 days/week
(93 hours) |
45 kW heater:
$5,912 |
$1,535 |
$4,377
(74%) |
|
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