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How to Select Ultra Heat Tank Heaters for Your RV's Holding Tanks |
All holding tanks mounted below the floor of a motorized or towable RV can potentially freeze
solid in cold weather. UltraHeat™ Tank Heaters are designed to protect your
RV's black, gray and freshwater holding tanks from freezing up. This allows the
RV owner to reuse their holding tanks and the major conveniences like the shower,
sinks and toilet. Selecting the correct UltraHeat™ Tank Heaters for your
holding tanks is simple.
1. Select heaters by the WAY YOU USE your RV.
A) Traveling in your RV, moving from place to place, not staying in one place
for any extended period of time or, staying in one location for long periods
of time.
Use a 13.5 Volt DC (vdc) powered tank heater(s)(Automotive current)
B) Accessing power from a remote or portable generator producing 120 Volt
AC (vac) current (household current), or for some construction trailers
(without a power converter) or for some park model trailers (without a
power converter).
Use a 120 Volt AC (vac) powered tank heater(s)
C) When a dual voltage (DC and/or AC) power source choice is desired.
- Protect while you are camping - 0.2 Volt - DC
- Protect when you are parked or have your unit in storage with an electrical
hook-up. - 120 volt - AC
Use the COMBINATION - AM-M3600 heater (DC/AC) (This heater has two (2) separate heating elements that operate INDEPENDENT of each other)
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2. Determine the size(s) of holding tank(s) that need protection.
- Up to 25 Gallon (95 Liter) Capacity:
- Use AM-M0900 13.5 (vdc) heater
- Up to 40 Gallon (110 to 151 Liter) Capacity:
- Use AM-M1200 13.5 (vdc) heater
- Use AM-M4200 120 (vac) heater
- Use AM-M3600 Combination
- 40 Gallon to 60 Gallon (151 to 227 Liter) Capacity
- Use AM-M2400 13.5 (vdc) heater
- Use AM-M4800 120 (vac) heater
- Combination heater - 2 heaters required
- Larger than 60 gallon (227 Liter) Capacity, refer to chart (link) in
this section. (multiple heaters wired in parallel)
3. Determine the Number of HEATERS required per holding tank
- Simply add the number required for each size of holding tank(s)
pipes, and elbows, refer to the chart below ---or---
- Use the CONFIGURATOR to compute your heater needs.
13.5 Volt DC Tank Heaters
Heaters are wired directly into the 13.5 Volt DC power system (converter &
coach batteries) in an RV. Installed on a fused 13.5 VDC power circuit and
operated with a toggle power switch, the 13.5 VDC tank heaters are easy to operate.
Once installed, turn the power switch "ON" when the outside temperature approaches
freezing and turn the power "OFF" when the outside temperature stays above freezing.
120 VAC (Household Current) Tank Heaters
UltraHeat heaters are equipped with a 15-foot (4.6m) power cord and a
standard two-prong electrical plug. An appropriate extension cord and access
to 110-120 Volt AC standard shore power or generator power is all that is
required to power and operate. Unplug the power cord when the outside temperature
stays above freezing.
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HEATER CHART
Tank Volume
in GALLONS (Liters)
(Minimum to Maximum) |
#AM-M1200 |
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#AM-M2400 |
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#AM-M3600 |
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#AM-M4200 |
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#AM-M4800 |
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| 0 to 40 (151 Liters) |
1 |
or |
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1 |
or |
1 |
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| 41 to 60 (227 Liters) |
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1 |
or |
1 |
or |
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1 |
| 61 to 80 (303 Liters) |
2 |
or |
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2 |
or |
2 |
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| 81 to 100 (379 Liters) |
(1 |
plus |
1) |
or |
3 |
or |
(1 |
plus |
1) |
| 101 to 120 (454 Liters) |
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2 |
or |
3 |
or |
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2 |
| 121 to 160 (606 Liters) |
(1 |
plus |
2) |
or |
4 |
or |
(1 |
plus |
2) |
DETERMINE TANK HOLDING CAPACITY (GALLONS)
Determine the fluid capacity of each holding tank mounted below the floor
(gallons). Holding tank capacities are normally listed in your RV's owners manual,
or in the specifications for your RV. The capacity of a holding tank can be
calculated. Measure the length, width and average height of a holding tank in
inches. Multiply the length, width and average height, in inches to find the
volume in cubic inches. Now divide the volume in cubic inches by 231 cubic
inches per gallon to find the capacity of your holding tank in gallons.
DETERMINE TANK HOLDING CAPACITY (LITERS)
Determine the fluid capacity of each holding tank mounted below the floor
(liters). Holding tank capacities are normally listed in your RV's owners manual,
or in the specifications for your RV. The capacity of a holding tank can be
calculated. Measure the length, width and average height of a holding tank in
centimeters. Multiply the length, width and average height, in centimeters to find the
volume in cubic centimeters. Now multiply the volume in cubic centimeters by 1,000 to find the
capacity of your holding tank in liters.
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