var q installexpansiontankhotwaterheatervideoThe Open Direct Radiant System is a significant breakthrough in radiant heating design. The Open Direct Radiant System offers unprecedented efficiency with a highly affordable first cost and is our preferred system of all radiant heating systems. It is one single system that operates in two different and distinct ways. When floor heat is called for, the pump comes on and water flows out of the tank, through the radiant floor heating zone and back to the tank. When domestic hot water is wanted, water flows out of the tank and goes to the fixture. All water in the system remains potable. It is arguably the most energy efficient and environmentally friendly heating system in the world. It is one of the very few exceptions to the rule that better things cost more. You literally get a much better system for a lot less money. THE OPEN DIRECT SYSTEM BENEFITSOpen Direct System Energy Efficiency Benefits. The Open Direct System uses radiant heating which is fundamentally more energy efficient. Dual use designs have less than standby losses of two independent methods. One set eliminated and the other reduced because of efficient utilization. Lower first cost presents the opportunity to buy better, more efficient unit. The Open Direct System is compatible with solar. Domestic water heaters are potentially more efficient than a boiler. They can operate at low temperatures and they enable condensation of the flue gasses. Be aware that these benefits are only available with quality water heaters and may not be realized with cheap models. Cold water pre heat provides limited free cooling by the detail where cold replacement water passes through the tubes in the floor before it goes to the tank. The tank enables a huge heat exchanger for the flue. Open Direct System Environmental Benefits. Lower fuel consumption. IF YOU CONDENSE THE STEAM IN THE EXHAUST DOWN TO WATER, YOU CAN PICK UP ANOTHER 1. IN EFFICIENCY. Significant amounts of the pollutants will dissolve in the water and they go harmlessly down the drain instead of polluting the air. Other benefits of the Open Direct System. Our Open Direct System is Exceptionally Affordable. Our design is simple elegant. Thermal expansion tanks promote pressure relief for your water heater. As water heats, it expands, and without a way for the pressure to be alleviated. Solar water heating SWH is the conversion of sunlight into heat for water heating using a solar thermal collector. A variety of configurations are available at. Amtrol 141N43 THERMXTROL ST12 Expansion Tank Amtrol ST12 ThermXTrol is a water heater expansion tank, designed for use in domestic hot water heating. The design uses a water heater for dual purposes. No boiler saves thousands of dollars. Our design uses fewer parts. Easy installation saves labor cost. Energy Efficiency saves fuel costs. Easy to Install. Our Open Direct System has a simple design and low number of parts compared to other systems. Easy to Work On. The simplicity of our design and the ease with which you can find our parts in any hardware store make this system no problem for a handyman or the Do It Yourselfer. Simple to Maintain. Our design is easy to understand. Our radiant system operates at a much lower temperature than those of a furnace so its safer to work on, and our materials last a long time so they dont need constant upkeep. Easy to Get Parts For. Our design is straightforward and our parts are common. That might not sound like a good thing, but it is You can find the parts we use at any good hardware store, no special ordering required. Water entering a home through a system of pipes is usually cold. A water heater provides the hot water which makes it possible to take a hot shower or use a. EHow Auto gets you on the fast track with repair, maintenance, and shopping advice. Whether youre jump starting a battery or insuring a new car, we can help. The Open Direct System is one simple, efficient, entirely automatic system that provides both domestic hot water and heat for your home. Quotes were from 1550 to 2200 which is ridiculous for a heater that costs 840 Wholesale. Included install of expansion tank none present and adding ball style. Fewer Parts. Because our design is simple and we use a water heater for heat and domestic hot water, our system is less complicated uses fewer parts. More Reliable. Our system has fewer moving parts, runs at lower temperatures than boiler systems, and offers stainless steel quality. Longer Lasting. Lower operational temperatures, stainless steel construction, and high quality tubing equals a system that lasts and lasts. Energy Efficient. Radiant heating is naturally energy efficient. Our system operates at lower temperatures so less fuel is needed to heat the water and our hot water heaters condense flue gasses to get maximum heating from your fuel. Environmentally Friendly. Because we use condensing water heaters, our systems have lower emissions than others. Our systems also uses less fuel than a boiler system, and are compatible with solar. Compatible with Solar. Our Open Direct System is compatible with solar. Check out our Solar Energy Library for more information about how to integrate solar panels into your radiant heating system. Do It Yourself Friendly. Our Open Direct System is a simple, elegant design that uses easy to find common parts. Many of our customers choose to use our free design assistance and install the system themselves at great savings. Read more about DIY installation here. Code Compliant. Our Systems are Code Compliant. Ask your tech for more information concerning your specific application, but in general, here is some relevant information Safe. Our system runs at lower temperatures than systems with a boiler, making it inherently safer to install, to use, and to maintain. CAUTION, NEGATIVITY. We must note here that innovation is not always welcomed by those with special interests in the status quo. You must consider the source when you evaluate comments from those who profit from the sale of boilers. Low cost and simplicity is not always welcome. You cannot make a 5,0. The use of water heaters in radiant heating applications is accepted by all major codes. There has never been even a single case of Legionnaires disease attributed to an open direct system. Do not let lies from disgruntled competitors deprive you of what you are entitled to. HOW THE OPEN DIRECT SYSTEM OPERATESThe Open Direct System is a single system that operates in two distinct ways Heating Mode Operation In this mode it heats your home. Domestic Hot Water Mode Operation In this mode it provides hot water. This ingenious system is entirely automatic. It seamlessy heats your home AND provides domestic hot water without any input from the homeowner. You dont have to make any separate actions or adjustment at all to use it. This is how the two different modes work, starting with heating mode THE OPEN DIRECT SYSTEM HEATING MODE OPERATIONWhen the thermostat senses the need for heat, it turns on the pump. Warm water is pumped from the water heater through the tubing within the floor, radiating heat through your underfloor radiant system and into your living spaces. The warm water reaches the end of the tubing loop considerably cooler than it started and makes its way back to the heater to be reheated. Note Cold water does not enter the system during the heating mode unless someone draws hot water out because the system is already full. FLOW DESCRIPTION Heating Mode Operation. When heat is called for, the pump comes on and water flows out of the top of the tank, through the heating zone and back to the bottom of the tank to be heated again. This system is incredibly efficient. During the summer, limited free cooling is enjoyed, which saves on your air conditioning bill. Heat is absorbed from the building as the water in your radiant underfloor heating system warms up to room temperature. That room temperature water gets drawn into the hot water tank as hot water is used in the home, and gets replaced in the underfloor radiant tubing with cold water. The room temperature water pulled into the domestic hot water tank from your radiant system also costs less to heat, which saves again on your gas bill THE OPEN DIRECT SYSTEM DOMESTIC HOT WATER MODEWarm water comes out of the tank and flows into your fixtures such as sink, shower etc. Cold water from the well or from the town water main must replace the water that was used. This cold water goes through the underfloor radiant tubing on its way to the water heater.