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3

If the vent pipes are made of iron based metal or any covered over grate is made of similar material you could go hunting with a magnet.


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Bare copper will eventually corrode if it is in left in direct contact with concrete over time. You can try wrapping the pipe in duct tape and then covering it with sand, then skim coating over the top with concrete. That way, you could get access to the pipe again if you needed to.


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You've asked several questions here. Checking if it's 24V AC First of all, by far the vast majority of furnaces use 24VAC for control wiring. However, it's always better to be sure rather than make assumptions, so there are several ways to do this: Look at the spec sheet or manual for your model Look for labels on the control board, probably where the ...


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Reduced intake air is the most common cause. This could be caused by a dirty filter, blocked/restricted returns, or any other restrictions of intake air. The truth is, limit switches can only trip so many times before they break. Each time the furnace overheats and trips the limit; for whatever reason, the life of the switch is reduced. It was likely not ...


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UV lights in both HVAC and water purification systems should be changed yearly. This is also in the Honewell spec sheet for the UV2400: Lamp should be changed 1/year or every 9000 hrs to maintain its effectiveness Many systems have a timer and will start beeping and/or flashing a light after 1 year to remind you to replace them. It's not that ...


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The 40,000 BTU furnace is almost certainly sufficient. It doesn't take a gigantic amount of heat to heat an 1100 square foot house, even if the house is relatively poorly-insulated. If your goal is to improve your house's thermal envelope with more insulation and better windows, a 40,000 BTU furnace may even be oversized once you're done. To make sure, do a ...


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The "minutes per air change" is a design value chosen for the type of space and use that space has. In common situations, that number is ignored and simple rules of thumb for air flow are used instead. (Living rooms don't vary greatly in size, and the target numbers usually have a magnitude range of 2 to 4 anyway.) However, a common design for bedroom ...


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I had the same problem, intermittent flames, sometimes no response no matter how long I leave the switch to on position. Thanks to the knowledge here I measured the voltage on the wire and it was 320 millivolts. So I cleaned the contacts and the wire and reassembled the switch. Voila, works perfectly now. Thanks everybody. Just a little sandpaper on the ...


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Does anyone know what voltage a "healthy" thermopile produces? A little Googling does not give me a clear answer; I've seen everything from 30mV to 750mV, but I am leaning towards 750mV being the correct answer. I have the problem described in this thread and my thermopile is producing 300mV DC from the pilot light, measured at the switch. I've taken an AA ...


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Get an anemometer for $40 on the web and download the related app for your smartphone (free!) Website even has a video showing you how to use it. the app will track total cfm. the next step is determine the output of your furnace to determine leakage etc. Seal all ducts, balance your house with the main branches and enjoy!


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I am a licensed contractor, home inspector and certified energy auditor. Energy audits using blower doors in conjunction with infrared is ideal for air leakage that leads to heat and humidity loss and increased energy costs. The whole house humidifiers can be very problematic and can shorten the usable life of your furnace. I have been on countless home ...



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