Month: November 2016

wire_rubout

There are a few important things that I suggest checking on every service call to reduce callbacks and increase customer satisfaction. One of them that often gets missed is preventing wire rub outs.

One of my area managers and experienced tech Jesse Claerbout shot a video showing the simple step he takes to prevent major damage.

We also just release a new podcast episode today that you can hear in any podcast app or by listening HERE

Cheers!

–Bryan


In order to maintain combustion (burning) you need three things, fuel, heat and oxygen. If you have all three in the proper proportion you can maintain a continuous state of combustion.

Remove one (or reduce one sufficiently) and the triangle of combustion can collapse.

In a common NG gas furnace the heat is the igniter, the fuel is Natural Gas and the oxygen is provided by combustion air.

Combustion air is literally just the air needed to provide a continuous supply of air for proper combustion (burning).

All gas fired appliances must have both a flue / chimney to exhaust the leftover products of combustion (outlet) as well as combustion air to provide the oxygen for burning (inlet).

In high efficiency furnaces the combustion air is generally piped in, directly from the outside straight into the combustion chamber. This creates a dedicated source of oxygen and also a cleaner install as no other provisions need to be make for combustion air.

In 80% furnaces the burners usually have “open” combustion and they rely on air being drawn into louvers on the furnace cabinet. In this design the space on which the furnace resides must have open communication to the outdoors or other “uncontained” space.

Not to get into the specifics of code, but you must have a dedicated method to get significant air to the furnace . If you do not, the real possibility exists that the furnace could begin burning improperly creating an unsafe condition for the occupants due to Carbonmonoxide.

Different parts of the country provide combustion air in differnent ways, but you MUST have some method of providing unlimited fresh air to a furnace or to the room in which the furnace is located. This means when a furnace is in a tight space, ensure you have some sort of significant combustion air.

— Bryan

electrical-theory

In this episode of HVAC School, Bryan talks to his boys about basic electrical theory and they talk about:

  • Differential Charges
  • Electromotive Force
  • Ohm’s Law
  • Volts, Ohms, Amps and Watts
  • Electrical paths
  • Conductors and insulators
  • Resistive and Inductive loads

And Much more…

As always if you have an iPhone subscribe HEREand if you have an Android phone subscribe HERE

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