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When properly installed, a heated tile floor is practically indestructible. To protect the integrity of your investment, tiles need to be protected from multiple angles: from underneath, at perimeters and transitions, and within large expansions.

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From memory the propane orifice would be larger so by using the natural gas your heater would not get as hot as it would with the correct orifice so I do not think it would hurt anything.

Question...Over the past 18 months, after our home was built, we learned our two tankless water heaters have been running propane through a natural gas orifice. We discovered the issue after hearing a loud noise coming from one of the water heaters. Could this have damaged the water heaters? Thanks in advance

DITRA-HEAT is the only system that provides floor warming and uncoupling in a single layer. Uncoupling refers to the act of preventing any movement and stress that occurs in the subfloor from transferring through to the tile above, thus preventing cracked tiles and grout.

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Because ceramic and stone tiles are inherently brittle, their exposed edges can chip and crack if left unprotected. Transitions between floor surfaces and at thresholds are particularly vulnerable to damage. Schluter®-Profiles provide edge protection and transitioning at thresholds and between adjacent surfaces, resulting in durable, maintenance-free tiled coverings.

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Tiled floors are ideal for any room in the home. But when you add warmth to your tiled floor, you add a touch of luxury that brings your flooring experience to a whole new level. Imagine bare feet walking across a nice cozy floor that also has all the benefits associated with tile. An allergen-free floor covering, tile is available in endless designs, colors, and sizes, and offers easy-maintenance too.

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The frequent fluctuations in temperature caused by a floor warming system lead to more expansion and contraction of materials in the floor assembly. These frequent changes create greater movement stresses in the tile covering and increase the need for uncoupling. Existing installation methods require the installation of two separate systems – a floor warming system and an uncoupling system.

Of concern here is not only this, but if someone did that with your hot water heater, could they have plumbed the propane into your entire house? If so, there is significant risk of that excess heat causing damage to the fire box of your heater, which can then lead to gasses like carbon monoxide getting into your living space and poisoning you! There have been news reports of whole families being killed as a result of substituting propane for natural gas to heat their homes (without making the necessary changes).

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Nat gas orifice is significantly larger than propane orifice , so the heaters have been exposed to more heat /flame than design ; that could be a problem. I learned this the hard way; hooked up a nat gas grill to a propane bottle. On the lowest burner setting flame came out around the space between the top and bottom of the grill. In round numbers the gas molecules take up the same volume ( Ideal gas law) . In the nat gas molecule you have one C and 4 H to burn , in a propane molecule you have three C and eight H to burn. So the nat gas orifice is larger to let more molecules through , it lets the same larger number of propane molecules through producing more heat/flame.

Over concrete substrates, DITRA-HEAT-DUO is ideal due to its integrated bonding fleece which provides a thermal break, as well as sound control. The integrated thermal break directs more heat up into the tile rather than down into the subfloor, resulting in tiled floors that warm up to 70% faster over concrete substrates during heat-up times. By reducing the loss of heat to the subfloor during heat-up times, DITRA-HEAT-DUO provides considerable energy savings when the thermostat is set on automatic mode and on a tempurature schedule. This system has been designed to allow for the DITRA-HEAT-E-HK heating cables to be snapped into place, and provide the same effective uncoupling protection as DITRA to prevent cracked tiles and grout. Impact sound transmission is reduced through floor-to-ceiling assemblies, making DITRA-HEAT-DUO ideal for multi-story construction. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. DITRA-HEAT-DUO performs all these functions while still providing adequate support/load distribution for the tile covering.

Movement joints are an integral part of any tile assembly. The various components of a tile assembly (tile, mortar, substrate, etc.) expand and contract according to each component’s intrinsic physical properties with changes in moisture, temperature, and loading, resulting in internal stresses. Schluter®-Systems’ prefabricated movement joint profiles protect tile edges and prevent sound bridges and surface water penetration, resulting in a permanent, maintenance-free installation.

Added : Orifice size for natural gas range from # 54-31 (drill bit sizes) Propane orifices range #62-48 so I had it backwards The larger the number the smaller the hole. In this case there was two much going to the heater so it may have shortened the systems life , however since the air mixture was probably off it may not have been burning efficiently and wasting gas.

An appliance designed for natural gas has the burner orifices (flame holes) designed for the pressure and flame temperature of a natural gas system. Propane burns with twice the energy of natural gas, so if you put propane through a burner designed for the lower pressure / lower yield gas, it will burn significantly hotter and potentially more dangerously. It will also likely waste a lot of heat because the heat exchanger in the water heater was designed for a specific amount of flame contact. So the hotter / larger flame coming from the propane will just go up the flue as waste heat. It MIGHT possibly cause damage to the heat exchanger, only the water heater mfr could tell you for sure, but it's a sure thing they will not tell you that it is OK.