• MERCIER ENGINEERING INTRODUCES “PRE-BUILT, PRE-PACKAGED BOILER SYSTEMS”

    This Blog, originally written in 2008 has been superseded by our subsequent development activity, culminating in a Non-Provisional Intelligent Property Protection Submission (Utility Patent) in the USA & Canada in April, 2017.

    The original blog crossed out text following has been retained to witness our efforts in both timeline and content. The final submission attributes:

    1. A true hydronic appliance vs. the partially pre-built, conventional system described therein.
    2. New Delta-T ECM Hydronic Technology is fully integrated, dramatically reducing component content, increasing distribution efficiency and system performance.
    3. Gravity (Convection) Heating is optimized and provides innate, additional performance.
    4. A flexible, modular design, it is readily manufactured and provides excellent value with predictable performance.
    5. Prior and further proprietary design features have been fully integrated. Example: The “Iron Cross Manifold” has evolved into the “Compact Steel Hydronic Header” – Patent Pending.

    The ENHANCED CONVECTION, DIFFERENTIAL TEMPERATURE MANAGED, HYDRONIC HEATING APPLIANCE™ Product Brochure on our BoilersOnDemand.com website will further detail our effort. 

    Amended 07/07/2017 P.D.M., Sr.

    Modern, high efficiency hydronic (hot water) heating systems necessarily incorporate technological features that sophisticate them, particularly in the areas of controls and distribution. Whereas in the past one could make a few wiring connections and connect a few pipes, now the task may appear daunting. However, organizing these functions logically and employing selected hydronic and control components can result in both a sophisticated, yet simple system.

    Mercier Engineering is dedicated to advancing hydronic heating applications by applying the benefits of over 50 years of “being in the trenches”, so to speak. As such we recognize that there are skilled DIY’s (Do-It-Yourselfers) and Contractors who have access to skills complimenting heating installations. Our contribution is to reduce the task to a manageable one in cooperation with our customer by providing a very cost-effective, packaged forced hot water heating system.

    Since the introduction of Weil-McLain’s Ultra Series of Gas and Oil Boilers (click on our site links) and applying Taco’s renowned hydronic components and relays to them, we recognize the opportunity of readily “packaging” these products. This is further highlighted by the recent announcement of our “Iron Cross Manifold” (TM) System that efficiently configures multiple circulators and valving. Furthermore as service people ourselves this configuration is a serviceman’s pleasure, providing ready access and diagnostics for future eventualities. Note that this service is available ONLY on and limited to the Weil-McLain Ultra Series Products.

    From client supplied site detail we build the boiler systems on the Weil-McLain Pallets, then knock them down for re-shipment. All shipments are F.O.B. Antrim, New Hampshire. Note that packaging limitations may preclude commercial freight and require arranging local pickup by the client.

    To complete the installation the client will have to:

    1. Transit, de-palletize and position the system.
    2. Exhaust the boiler per manufacturer recommendations.
    3. Assemble the burner to the boiler (oil only).
    4. Extend fuel connection (gas piping or oil line) to the system.
    5. Extend 1/2″ water service to the input pressure regulator/backflow preventer.
    6. Connect the heating zone supplies and returns as applicable.
    7. Connect the thermostats to the control relay.
    8. Extend 110V 15A power service from the overhead thermal switch to the boiler service switch.
    9. Execute system fill, purge and start up procedures.

    Also note that all permits, code compliance and inspection(s) are the responsibility of the client.

    So, if you have been hesitant to upgrade and thought you just couldn’t afford a top-end Energy Star System, but have complementary skills at your disposal, this may be an answer to your dilemma.

    Contact us to discuss your particular situation. As usual there is NO OBLIGATION.


  • MERCIER ENGINEERING TRADEMARKS IT’S “IRON CROSS MANIFOLD™”.

    Mercier Engineering announces that of this date, July 19, 2008 it will heretofore refer to and claim origination of its unique hydronic piping configured supply and return manifolds based on the use of pipe crosses as an “Iron Cross Manifold™”.

    Further, all of Mercier Engineering’s subsequent designs, build and install boiler configurations will employ the “Iron Cross Manifold™” as a product performance enhancement feature wherever applicable on supply and return piping configurations.

    To date this technique has been employed specifically on overhead multi-circulator supply and single point purge return manifolds, some of whom are pictured on this site. It has corresponding benefits as well with zone valve based systems that we intend to incorporate into our designs.

    As background we offer that Mercier Engineering has been developing practical and durable black iron piping configurations specifically for the unique and efficient Weil-McLain Ultra Oil “Triple Pass” Boilers in an effort to maximize their performance while improving installation practice for improved economic benefit. The resultant is a structurally superior, durable, flexible, very serviceable and efficient alternative to the usual copper pipe built-in-place installation practice. To this end our boiler replacements have used minimal to no, and yes have in fact netted surplus copper pipe! That cost benefit alone is currently notable.

    Mercier Engineering has focused on Weil-McLain’s Ultra Oil Boiler, but the “Iron Cross Manifold ™” is applicable to their Gold Oil and Ultra Gas Series as well. It is our intent to provide these applications ONLY. We are exclusive to the Weil-McLain Product Line and will remain so for the foreseeable future.

    See also our Pre-Built System announcement.


  • STRETCH YOUR WATER HEATER PERFORMANCE WITH A TEMPERING TANK

    Water heaters are rated by the number of gallons of water per minute (GPM) or per hour (GPH) that they can raise water 100 Degrees Fahrenheit. This measure applies to all water heaters, regardless of their construction or fuel source.

    So by definition if we can increase the incoming water temperature to our heater:

    1. The output water temperature can be increased (subject to a safe temperature limiting), or
    2. The volume of controlled temperature water output can be increased, and
    3. The total effective capacity of any heater can be increased.

    Domestic water entering your home (or business) is always significantly colder than the heated environment. Thus as an example you must let the water run a while before it gets cold to pull cooler water from the outside the building (underground) water source. The effect is similar with the hot water heater supply piping, subject to the limited water piping capacity within the heated area. When the cooler water reaches the water heater it has to work harder to elevate temperature. Therefore by increasing the amount of environmentally warmed water to the heater we increase performance and save energy.

    Placing a non-insulated water tank between the water service entrance and the water heater we allow a larger volume of water to acclimate (temper) to the ambient temperature at its location, thus a “Tempering Tank”. Its construction and configuration are simple:

    1. A somewhat taller than wide tank with two pipe openings, one near/at the bottom and the other near/at the top. Its interior finish must be compatible with passing potable (sanitary) water through it safely.
    2. The incoming (cooler) water is piped to the bottom of the tank and the outgoing (warmer) from the top to your water heater. Hot water rises and therefore the warmer water stays substantially at the top while the colder replacement water enters the bottom. Water will diffuse within itself, but at a typically lesser rate than used, protracting this effect.

    Practically, any water heater or water storage tank stripped of insulation and being glass, stone or otherwise lined for water cleanliness is suitable. There are other options as well, typically used for well pumps and wet processes. So, look around for an opportunity.

    Note: One point to remember is that the temperature differential and flow of cold water can cause these tanks to “sweat” (condense moisture on the lower exterior of the tank). The simple solution is to provide a larger pan with an inch or so of coarse sand in it under the tank to absorb and then evaporate the condensation effectively.

    Please accept that this is not a cure all for a too marginal heater or a plugging in-boiler or other heater coil. The latter will surely get worse over time, but in the meanwhile helps with comfort while saving energy.

    This “trick” is nothing new. We sometimes refer to them as “Farmer’s Tanks” when found in our older New England Homes. Thank them.

    It’s a great Do-It-Yourself (DIY) Project. So that old electric water heater with the burned out elements that you just haven’t disposed of yet may have some life left in it after all.

    Last Edit: 04/05/2017 pdm


  • BOILER RUNS JUST FOR DOMESTIC HOT WATER – WASTING ENERGY!

    During the heating season, having an Immersion Coil in your Boiler to provide Domestic Hot Water (DHW) makes a lot of sense. You are utilizing the hot water present in your boiler for area heating to additionally provide hot tap water at a very reasonable cost.

    But what about when there is low or no area heating demand? Your boiler is still hot (typically between 160 and 190 degrees F) waiting to provide occasional domestic hot water (at about 120 to 140 degrees F). Meanwhile the boiler stays at temperature, radiating heat into the boiler room and leaking heat up the chimney, neither of which can be utilized.

    A commonly used trick to save energy during the low demand period is to turn off the boiler entirely using the Emergency Switch (usually located near the main hallway door, but may vary). When hot tap water is needed the boiler is switched on and provides hot water within 15-20 minutes, typically. After use the boiler is again switched off. The really thrifty have learned to shut off the boiler before the last shower or then run the dishwasher to utilize the remaining boiler heat to advantage.

    The efficiency answer is an Indirect Water Heater, a super-insulated storage tank heated by your boiler and substituting for your Immersion Coil. The best of these are made of stainless steel, super-insulated to lose about 1/2 degree F per hour and have lifetime warrantees. Additionally your Boiler Aquastat Control (controlling boiler temperature) should be changed to a “Cold Start Aquastat”, allowing it to heat ONLY when area heating or Domestic Hot Water is demanded or used to maintain tank temperature. Your boiler is now an “on-demand” type, lowering toward room temperature between cycles.

    This storage of a quantity of heated tap water not only gives you instantly available hot water at any time but is inexhaustible, with your boiler cycling to meet any demand. No more initially hot water that cools down quickly with use caused by under-sized or sediment-clogging Immersion Coils either. Yes, the thrifty can still use the Emergency Switch trick for additional savings. In fact, one family of four with two young boys has found that they need only switch on every two days in the summer after several showers, dishwasher, wash the dog, etc.

    Your boiler runs less and runs cooler on average too, prolonging its life while reducing radiated and chimney drafted heat losses. Efficiency gains all around.

    Note: This argument also applies to separate Electric, Gas or Oil Hot Water Heaters by incorporating them into a managed, single fuel system.

    Last Edit: 10/10/2012 pdm