Why this is a family card
Fogatti currently sells multiple RV tankless propane water heaters under the InstaShower family.
Current products range from compact lower-output models to larger high-flow versions.
A camper builder such as Modern Buggy can publish Fogatti tankless/on-demand water heater without stating whether the installed unit is InstaShower 7, 8 Plus, 9 Pro or another generation.
MHS therefore records the known product family and withholds exact BTU/flow claims from the camper relationship.
What “tankless” means
A tankless water heater heats water as it flows through the appliance instead of storing a large conventional tank of hot water.
That can reduce wait time between showers and avoid carrying the mass of a full storage-tank water heater.
It does not make water supply unlimited.
The camper's fresh-water tank, grey-water capacity, propane and electrical power still determine real autonomy.
Propane is the heat source
Current Fogatti tankless RV products use LP propane for the main heating energy.
The burner modulates according to the water-heating demand on modern products.
Gas-system installation, regulator pressure, combustion air and exhaust are safety-critical.
12 V controls
Current InstaShower products use 12 V DC electrical controls.
That means the heater still depends on the house electrical system even though propane creates the heat.
A fully discharged house battery can therefore affect hot-water operation.
The current lineup is not one specification
Fogatti's current range includes different models with materially different output and flow.
For example, the current InstaShower 7 page publishes:
- 48,000 BTU;
- up to 2.5 GPM.
Current higher models publish higher BTU/flow values.
Those exact numbers belong to exact models.
MHS does not assign 48K/2.5 GPM—or any larger number—to a generic camper link.
Temperature setting
Modern Fogatti tankless products use digital controls with selectable outlet-water temperature.
The current InstaShower 7 reference publishes approximately 95–123°F.
Other models/controllers can differ.
The actual controller and heater generation should be identified before using a model-specific temperature range.
Water flow matters
Tankless burners need sufficient water flow to start and operate steadily.
If a faucet is opened only slightly, the heater may behave differently from a normal shower.
When temperature fluctuates, useful checks include:
- flow rate;
- inlet-water temperature;
- pump pressure;
- filter/fixture restrictions;
- gas supply.
Cold inlet water
A tankless heater must raise incoming water to the target temperature while water is moving.
The colder the inlet water and the higher the flow, the more heat is required.
This is why the same heater can produce different useful shower flow in summer and near-freezing conditions.
BTU is not water flow
BTU/h describes burner heat input/output class.
GPM describes water flow.
A bigger BTU number can support greater temperature rise or greater flow, but one cannot be substituted directly for the other.
The correct product choice depends on inlet temperature and desired flow.
Water pressure
Current Fogatti product pages publish broad water-pressure operating ranges for exact models.
Those are equipment limits, not recommended pump settings for every camper.
The pump, regulator, tubing and other fixtures all have their own requirements.
Minimum opening and replacement doors
Fogatti sells tankless units with multiple exterior door sizes intended to cover common former tank-water-heater openings.
The current InstaShower 7 uses a minimum clear opening around 13 × 13 in with several door trim options.
Other family models can use different fit arrangements.
A generic family link should not be used as a cut-out template.
Freeze protection
Current Fogatti tankless products advertise built-in freeze-protection functions under specified powered/operating conditions.
MHS explanation.Freeze protection is conditional.
It does not mean the camper can be stored with water inside indefinitely without power or winterization.
The rest of the plumbing also remains vulnerable.
Winterization
Even if the heater has freeze-protection logic, the camper's:
- pump;
- faucets;
- shower;
- low points;
- tanks;
- hoses
still need the manufacturer-approved winter procedure.
Do not confuse “heater freeze protection” with “whole-camper winterized.”
Controller
Current Fogatti tankless packages include wired digital controllers.
Exact controller appearance/functions depend on heater generation.
For replacement, identify the heater and controller pair rather than ordering a generic Fogatti display.
Exhaust and CO safety
A propane water heater has combustion and exhaust.
Exterior venting must remain clear of blockage.
Soot, repeated ignition failure, unusual odor or a CO alarm should lead to proper diagnosis and shutdown—not bypassing safety controls.
Scale and maintenance
Mineral-rich water can leave scale inside heat exchangers.
Fogatti provides maintenance guidance for current tankless units.
Reduced hot-water performance is not a reason to increase propane pressure or exceed water-pressure limits.
On-demand versus storage heater behavior
A storage heater gives a fixed reservoir of preheated water and then needs recovery time.
A tankless heater instead tries to continue heating the flowing water.
For small campers the main limitation often shifts from “tank heater recovery” to “fresh-water/grey-water capacity.”
What to check in a camper
Find the actual Fogatti data label and identify:
- InstaShower model;
- BTU rating;
- controller;
- exterior door/opening;
- water-pressure range;
- electrical rating.
Then the family link can be replaced with an exact product card if needed.
Modern Buggy TC9 / TC12 / TC14
Modern Buggy publishes Fogatti tankless/on-demand water heating on TC9, TC12 and TC14.
The public pages do not identify one exact InstaShower model.
That is ideal family-level evidence:
- Fogatti is confirmed;
- tankless/on-demand architecture is confirmed;
- exact BTU/GPM/controller generation remains unknown.
Why optional A/C does not affect this link
The same Modern Buggy pages may show optional A/C equipment.
MHS treats each component independently.
A confirmed Fogatti water heater does not make optional A/C installed.
What this relationship proves
A verified Fogatti family link proves:
- Fogatti tankless propane hot-water architecture;
- 12 V-dependent control family;
- on-demand rather than conventional storage heating.
It does not prove:
- 48K/55K/66K BTU;
- exact GPM;
- exact door size;
- exact controller;
- exact freeze-protection behavior.
Key takeaway
Fogatti InstaShower is a family of propane tankless RV water heaters with 12 V controls. When the camper builder publishes only “Fogatti tankless,” MHS confirms the architecture and waits for the data label before assigning BTU, flow and exact controller specifications.
Sources
Family-level Fogatti tankless record. Exact BTU, flow, door size and controller generation are intentionally withheld until the installed model is identified.