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# Axiom Industries

## Sitemaps
[XML Sitemap](https://axiomind.com/sitemap_index.xml): Includes all crawlable and indexable pages.

## Posts
- [Side Stream Filters](https://axiomind.com/side-stream-filters/): Side-stream filters keep hydronic systems healthy like kidneys clean blood, yet almost nobody knows the actual flow rate through them. For consistent filtration regardless of variable pump head and filter loading, an automatic flow limiter in the side-stream circuit is the practical solution.
- [Right Back at You](https://axiomind.com/right-back-at-you/): A frantic call about a malfunctioning humidifier led to a long climb up the stairs of a high-rise — only to discover the unit hadn't been purchased from them at all. The novelty greeting card sent in response became a memorable lesson in checking the basics before calling for help.
- [That’s a Really Good Question](https://axiomind.com/thats-a-really-good-question/): A recreation complex's domestic hot water was lukewarm despite the boiler system running. The piping arrangement allowed boiler water to flow backwards through the shell-and-tube heat exchanger, feeding it return water instead of supply. The facility manager's parting question — 'How could they balance it when it's flowing backwards?' — remains unanswered.
- [I’m the Schmuck](https://axiomind.com/im-the-schmuck/): Converting a furnace to hydronic heating with a boiler and indoor-outdoor reset seemed like a great idea — until the family complained it was cold. Lower supply water temperatures meant cooler air from the registers, longer fan cycles, and a different comfort perception. Sometimes the technologist learns the hardest lessons at home.
- [Broken Butterfly](https://axiomind.com/broken-butterfly/): New automatic flow limiters were blamed when a heating coil produced no heat, but zero pressure drop across the limiter proved it wasn't plugged. The real culprit was a butterfly valve with a cleanly broken shaft — the handle moved but the disc didn't. Sometimes the simplest components fail in unexpected ways.
- [To Condense or not to Condense](https://axiomind.com/to-condense-or-not-to-condense/): Condensing boilers can reach 98% efficiency — but only when return water is around 80°F. Above 130°F the boiler won't condense at all, making it an expensive mid-efficient unit. Designing the connected system to consistently deliver low return temperatures is essential to realizing the efficiency promise.
- [Point of No Pressure Change](https://axiomind.com/point-of-no-pressure-change/): An expansion tank connected on the discharge side of the pump caused the pump inlet pressure to drop below atmospheric, turning the air separator into an air intake. The fix was simple — move the tank connection to the pump inlet. The glycol everyone blamed was never the problem.
- [Is That Strainer Clean ?](https://axiomind.com/is-that-strainer-clean/): A condo building's new modular boiler appeared undersized but was actually firing at half capacity due to a plugged strainer in the primary loop. The contractor said they'd blown it down, but pulling the screen revealed it was still plugged. Don't assume strainers are clean — open them up and check.
- [Counter Flow For High Heat Transfer](https://axiomind.com/counter-flow-for-high-heat-transfer/): Logarithmic mean temperature difference (LMTD) is the driving force behind heat transfer, and counter-flow arrangements produce a higher LMTD than parallel flow. For installers, the rule is simple: hot-to-hot, cold-to-cold — or for coils, air in where water goes out. Follow the labels.
- [Pump As Flow Meter](https://axiomind.com/pump-as-flow-meter/): Using a pump curve to estimate flow is a useful technique, but only if the gauge piping is correct. In this case, the gauge was connected upstream of the suction diffuser instead of at the pump flange, making the pump appear to be overflowing when it was actually close to spec.
- [What’s A Bubbler](https://axiomind.com/whats-a-bubbler/): Prison combination toilet bubblers serve double duty as a sink faucet and drinking fountain — which is why they must be installed with the outlet facing up. A repeat offender of TICI violations had to completely uninstall every fixture to flip one screw on the back of each bubbler.
- [Small Squirrel Cage Fans](https://axiomind.com/small-squirrel-cage-fans/): When small rooftop units came up short on airflow, the fix was surprisingly simple: swap in the next-size-up motor. The same fan with a higher-horsepower motor runs at a slightly higher RPM due to less slip, producing enough additional airflow to satisfy the balancer.
- [Garbage In, Garbage Out](https://axiomind.com/garbage-in-garbage-out/): Pressure-independent control valves were being blamed for a building's pumps running at 80% speed regardless of load. The real problem was the differential pressure sensor installed right at the pumps instead of out in the system — feeding garbage information to the variable speed pump controller.
- [One Too Many Strainers](https://axiomind.com/one-too-many-strainers/): A radiant floor system isolated by a flat plate heat exchanger wasn't working because the PHE had become plugged with pebbles and debris. Two strainers were installed downstream of the exchanger instead of upstream — protecting nothing. A reminder to always put strainers where they'll actually do some good.
- [New Project, Old Spec](https://axiomind.com/new-project-old-spec/): Outdated specifications can create real headaches. A hospital steam project's submittal was rejected because the spec called for bucket traps — even though the thermodynamic traps already installed were the superior choice for high-pressure drip applications. Even the competitor's own selector guide agreed.
- [Fine Print On Boiler Control](https://axiomind.com/fine-print-on-boiler-control/): A modulating-condensing boiler connected to a radiant garage slab was short-cycling badly despite being properly set up. The culprit was hidden in the manual's fine print: the controller was adding 10°F to whatever operating differential temperature was entered, causing the burner to overshoot and cycle repeatedly.
- [Air Separator: The Missing Link](https://axiomind.com/air-separator-the-missing-link/): Of the essential components every modern hydronic system needs, the air separator is the one most often missing. Without one, automatic air vents won't work properly, and the result is noise, poor circulation, and poor heat transfer. High temperature, low pressure, and low water velocity are the keys to effective air separation.
- [I Thought It Looked Better](https://axiomind.com/i-thought-it-looked-better/): When a wet rotor circulator pump failed to operate on a radiant floor heating project, the culprit was simple: the pump had been installed with the motor shaft vertical because the installer thought it looked better. All wet rotor pumps must be installed with the shaft horizontal, as the bearings aren't designed for thrust loads.
- [Schlembe](https://axiomind.com/schlembe/): Albert Einstein's word 'schlembe' — an improvement that makes things worse — perfectly describes what happened when an energy performance upgrade left a school freezing. Incorrectly installed monoflo tees and added control valve head loss combined with a revised ventilation schedule to kneecap the heating system.
- [Where is the Water Going?](https://axiomind.com/where-is-the-water-going/): A 15-storey apartment building with chronic cold complaints had most of its pump flow short-circuiting through an oversized, unbalanced unit heater in the penthouse mechanical room. Closing one ball valve brought immediate improvement — and a tenant confirmed the problem had existed for 22 years.
- [The Letter H – Getting Started](https://axiomind.com/the-letter-h-getting-started/): Primary-secondary piping doesn't have to be mysterious. Drawing a capital H captures every P-S connection's four arms and decoupler pipe, making it easy to map out flow rates, temperatures, and blending direction for both design and troubleshooting purposes.
- [Check, Check, Double-Check](https://axiomind.com/check-check-double-check/): A practical troubleshooting checklist developed from years of field experience — covering power, gas, rotation, valve positions, strainers, flues, and more. Running through the basics before making a site visit saves time for everyone and often reveals embarrassingly obvious problems.
- [RCMP Prison Toilets won’t](https://axiomind.com/rcmp-prison-toilets-wont/): Prison flush valves that wouldn't work properly pointed to a water pressure problem. The cause was buried underground — a hot tap connection where the installer had only drilled the small pilot hole instead of the full-diameter cutter hole, restricting the water supply to a quarter-inch opening.
- [Upside Down (and Far Away)](https://axiomind.com/upside-down-and-far-away/): A mother's condo heating system got hotter the more she turned it down. The problem: her brother had replaced the thermostat with a direct-acting model, but hydronic zone valves are normally open and require a reverse-acting thermostat. Diagnosed from 800 kilometres away over the phone.
- [Injection Issues](https://axiomind.com/injection-issues/): A boiler short-cycling like it was possessed turned out to be an injection pump issue in a primary-secondary radiant floor system. The globe valve in the injection return was wide open, causing the radiant supply to match boiler temperature, which repeatedly triggered the controller to shut down and restart the boiler.
- [Blow Me Down – 3- Phase Motor](https://axiomind.com/blow-me-down-3-phase-motor/): When an inline vane axial return fan wouldn't produce airflow, the boss climbed a ladder and held cardboard over a hole the contractors had cut — and got blown off the ladder. The fan was rotating backwards, a common 3-phase motor wiring issue fixed simply by swapping two of the leads.
- [A Metric Bite in the Butt & Jerry’s Pump laws](https://axiomind.com/a-metric-bite-in-the-butt-jerrys-pump-laws/): A domestic hot water recirculation pump showed almost no differential pressure — which actually meant too much flow, not too little. The cause: a metric conversion slip during submittals supplied 10 GPM flow limiters instead of 1.0 GPM, allowing the pump to drift nearly off its curve.

## Pages
- [Warranty & Returns](https://axiomind.com/warranty-returns/): Axiom Products are warranted to be free of defects in material and workmanship under normal use, for a period of one (1) year from the date of manufacture, or one (1) year of use with proof of purchase. This limited warranty will not exceed two (2) years, in any event.
- [Thank You](https://axiomind.com/contact-us/thank-you/)
- [Blog](https://axiomind.com/blog/)
- [Contact](https://axiomind.com/contact-us/): Axiom Industries Limited
- [Resources](https://axiomind.com/resources/)
- [Find a Rep](https://axiomind.com/find-a-rep/)
- [Products](https://axiomind.com/products/)
- [Home](https://axiomind.com/)

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