by High Performance HVAC | Gas Furnaces |
You can see the rust holes up near the sheet metal plates in this heat exchanger
Dangerous Cracked Heat Exchangers in Furnaces - Everyone wants heat when old man winter arrives in the fall. Many times we take it for granted. When the temperature falls all we have to do is go to the thermostat and turn the heat on. Usually, this is not a problem. We turn the thermostat on and the heat comes on. When we first turn the furnace on we have a slight burning odor that comes from the system. (more…)
by High Performance HVAC | Boilers |
Commercial Boiler Stack Economizer - This is not a normal commercial boiler stack in this boiler room. It has a bypass stack for a commercial hot water economizer. All boilers have make-up water to make up for water lost in the systems, especially for domestic hot water use.
An economizer makes things more efficient. In this regard, the economizer utilizes waste heat. Waste heat is normally vented into the atmosphere. This system was specially engineered and tested to ensure the proper operation of the design. (more…)
by High Performance HVAC | Technical Reference |
Bacharach Combustion Analyzer
Bacharach Combustion Analyzer Furnace Testing - The combustion analyzer is used to test gas and oil furnaces to make sure the combustion process is as efficient as possible. This multi-function HVAC test instrument can also be used to test spaces for carbon monoxide, test building pressure, all in addition to testing the combustion process of the furnace.
The combustion analyzer allows an HVAC technician to test the flue temperature, the amount of oxygen in the furnace flue gases, the amount of carbon monoxide in the flue gases, the amount of carbon dioxide in the flue gases, and the pressure of the flue. All these readings are necessary so the HVAC technician can make adjustments to the burner settings to ensure efficient combustion using the combustion analyzer. (more…)
by High Performance HVAC | Gas Furnaces |
Gas Furnace Components | HVAC Heating Systems. Different types of gas furnaces are available for purchase today and the older models which were installed many years ago still in operation. The older models were typically atmospheric-type gas furnaces and used a lot of gas to produce heat, much of which went up the flue because efficiencies were low.
The standing pilot atmospheric type gas furnaces still exist today, but they are slowly going the way of the dinosaur as newer more efficient furnaces are replacing them. (more…)
by High Performance HVAC | Gas Furnaces |
Gas Oil Vent Flue Vents Materials Table - Gas and oil vent flue piping uses different types of materials depending on the applications. It is important that gas or oil flue vent pipes are installed correctly and maintained throughout the life of the furnace
This pipe has a condensation problem which an adept technician will recognize and take corrective action before the corrosive effects of condensed gas residue eat through the flue pipes and weaken masonry in chimneys.
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by High Performance HVAC | Gas Furnaces |
Draft hood not connected properly to the flue on an atmospheric boiler
Flue Size Chimney Liners Corrosion - It is important that furnace flues are sized properly or vent into chimneys that have chimney liners in them. Many older heating systems were oversized. From the furnace to the chimney used to vent the exhaust gases many older systems are oversized.
These older systems were also inefficient. Modern furnaces and boilers are far more efficient than the older inefficient systems. The older systems had flue gases that contained more heat than the newer modern heating systems. It is, therefore, important that flue size is sized properly for the newer furnaces because the flue gases are highly corrosive when they condense. (more…)
