Gas Ventilation Inspection

Having a gas boiler or a gas heater at home sounds like something quite normal, and to some there is nothing out of the extraordinary with this. However, many people fail to understand that they have the responsibility to run a gas ventilation inspection every certain amount of time, especially if they have had problems with their gas ventilation system in the past. Moreover, the older you gas heater is, the more chances you have that it will break and that’s why it’s extremely recommended that you have a gas ventilation inspection on your heater, as well as on your entire gas ventilation system.

What Does Gas Ventilation Inspection Check?

  • All unfinished spaces in the home should be inspected for proper use with gas ventilation system
  • All the top floors and foundation areas should be inspected
  • Venting systems of kitchen, bathroom, and laundry should be inspected
  • Ventilation fans and thermostatic controls should be inspected
  • Inspection should be made on the types of fans and exhaust used
  • Dryer power source should be inspected
  • Dryer vent style should be inspected

Categories of Appliances for Gas Ventilation

It is necessary to understand the gas ventilation requirements to explain when vent systems can and cannot be combined. There are four venting categories of gas appliances:

  • Non- positive B-Vent: The appliances under this category are for residential purposes. These are an induced draft furnace, which includes old typed gravity opened furnaces and new ones that are fan assisted models.
  • Non-positive condensing unique per manufacturer: The appliances under this category are not used for residential purposes, but there are few wall vented heaters and boilers that can be used for residential purpose. Under this category manufacturers have strictly banned the interconnection of the exhaust system with any other appliances for gas ventilation.
  • Positive non stainless steel: The appliances under this category are water heaters without tanks that can be vented through connecting with walls. It has a mechanical draft system operating on positive pressure, and thus cannot be connected with a flueless heater.
  • Positive condensing plastic: The appliances under this category use plastic vent pipes. These appliances are usually high efficiency furnaces and water heaters that work on positive pressure, so they cannot be combined with appliances vented through natural draft.

Gas Ventilation Inspection Companies

Without a doubt, there are numerous gas ventilation inspection companies spread all over the U.S., but some hold a bigger name than others. Certainly, the prices can vary depending on the location and on the size of the project, but the truth is that you will only find out the total price by contacting them and requesting your own quote. In addition, inspectors usually recommend the non-condensing air furnace, because it produces less stem than others. Some of the largest gas ventilation inspection companies in the U.S. are:

  • PD Spect
  • Inspectorate
  • Field Did
  • Delta Property Solucions LLC
  • CTSI
  • IAQ Now
  • Visual Inspection AVR
  • S&S Northern
In addition, there may be special circumstances where the city will perform the gas ventilation inspection, but this is not a service available to everybody.


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