Tag Archives: furnace

How to Install a Programmable Thermostat

programmable thermostatInstalling a programmable thermostat is not unlike installing any other thermostat for your HVAC system. The key is to get the right thermostat for your HVAC system. And to make sure it is wired properly. Many thermostat manufacturers provide detailed installation instructions with their thermostats to make sure you have all the information you need to install the thermostat properly. Sometimes the instructions that come with the new thermostat can be vague or even confusing and that is what we want to help you with here at High Performance HVAC. Please see our other articles for installing thermostats on our other pages to help you with your thermostat installation. Below are some good tips and detailed instructions on installing your new programmable thermostat. And don’t forget after the new tstat is installed you still have to program it.

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Troubleshooting Electronic Ignition Gas Furnace | HVAC Heating Repair

Troubleshooting Electronic Ignition Gas Furnace

Electronic Control Board for an Electronic Ignition Furnace

Troubleshooting Electronic Ignition Gas Furnace – Electronic ignition for gas furnaces is the modern way for furnaces to light the main burners on modern gas furnaces. Furnace technology has evolved from the standing pilot gas ignition systems that continue to be used today however there are less and less standing pilot furnaces used today.  If your furnace is not working and you want to troubleshoot a heating system it is important to make sure you know which type of ignition system you have for your furnace.

Troubleshooting Electronic Ignition Gas Furnace

Additionally there are different types of systems and it is important to differentiate between the types of electronic systems before troubleshooting. We will break it all down for you in this series article: “Troubleshooting an Electronic Ignition Gas Furnace“.

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Proper Humidity Levels and Factors for Home Comfort & Health | HVAC Health

moist and dry air problems & health

Proper Humidity Levels and Factors for Home Comfort & Health – The Contents and Make Up of Air and Humidity

Proper Levels of humidity Factors for Home Comfort and HealthProper Humidity Levels and Factors for Home – Humidity is important to our home and health and it is important to maintain the correct humidity in our homes and workplaces for our health. What is humidity? Humidity is simply little water droplets in the air. Cold air is nearly saturated with these little water droplets because the contents of cold air allow the air to hold more water droplets or humidity. As air is heated it expands and holds less humidity. When you heat the air in your home using a furnace, boiler, or heat pump this air expands and becomes drier. It is air with less humidity relatively speaking before it was heated and compared to the outside air. Air that is 30° F with 80% humidity will only be 15% humidity at 75° F. That is a big difference in humidity levels in the home after the air is heated. Granted, you are not heating air from 30° F to 75° F with your furnace. Depending on the set up of your thermostat and heating system you are most likely heating air that is 68° F to around 70° F to 75° F depending on the thermostat setting. The point is unless you have a source providing humidity to the air stream you are simply reheating dry air from inside the structure. There will be minimal infiltration humidity but the infiltration humidity will never be enough to bring the humidity levels up to healthy levels inside the structure for the inhabitants, plants, and furniture.

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Home Humidity Problems Maintaining Proper Humidity | HVAC Health

Home Humidity Problems – Is 60% Humidity in the Home Too High?

HIGH HUMIDITY 60 % +. Within the last month, I moved into a new house. It has dry walls and not plaster walls. The furnace and hot water tank were installed a week or so before we moved in to the house. Last week we determined that there is a humidity issue when the windows were sweating. We are trying to determine the source of the humidity. The contractor feels it may be the high efficiency furnace. I have a Lennox g61mp. The combustion air is pulled from within the un finished basement. Should the air be pulled from the outside? The gases are vented via PVC pipe which slopes back to the furnace.

Could the furnace be causing the humidity problem? If yes, what could be causing the humidity problem? The installer said it is not the furnace.

Home Humidity Problems Answer…….

Home Humidity Problems – Maintaining the proper humidity levels in the home is important not only for health (as indicated on High Performance HVAC Humidifiers Page) but also for the wood products in the home including doors and windows. The quick answer to your question about the furnace causing the humidity problems is no. Gas furnaces and other heating appliances tend to dehumidify the air and do not create any more humidification. I wonder where your supply vents are located and are they directed to blow hot air towards the windows? Condensation is created when the temperature of air is colder than the dew point. A prime place for this to occur is windows and doors. This is part of the reason why many supply vents for forced air systems, and radiators for hot water systems, are placed near windows and doors. It keeps the windows warmer and above the dew point and also makes the air warm from your heat loss near these locations.

Home Humidity Problems – Lennox G61MP Gas Furnace

The furnace you describe, the Lennox G61MP, is a condensing furnace and having the combustion air intake in the basement actually contributes to removing humidity from the basement. It sucks the air from the basement for use in the combustion process and the humidity in this air is condensed during the combustion process in the heat exchanger. This condensation is gotten rid of down a condensation drain near the furnace or blown out the exhaust where the combustion gases are expelled. If your supply vents are located near the doors and windows and you still have this problem then it may be time for new doors and windows as you have too much heat loss at these places and all the humidity is being condensed around the windows in your home.

Home Humidity Problems - Proper Humidity Levels

For more information on humidity and health click here.


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Home Humidity Problems Maintaining Proper Home Humidity

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser

Honeywell Chronotherm Plus Thermostat - Trane XL19i Condenser

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser – I have a Honeywell Chronotherm Plus 8624D running a Trane XL19i with a Trane XV90 – all installed new in new construction in 2003. Every winter, during the morning warm-up from 66 to 70, the burners stays on for approximately 1.5 hours at 70, then rises quickly to 73 before finally shutting off. The only way to interrupt the process is to turn the system to OFF at the thermostat. The system is on AUTO with the cooling set at 75 for the winter. I have swapped the thermostats (there are two sets in the house, this is the one in the attic for the second floor) with the same results. I have not swapped the thermostat circuit boards, but I can not see a reason to. The main floor is on the same schedule, but has never done this three degree burst. I have had three different contractors out, with corresponding charges for thermostat troubleshooting with no luck. Have you ever seen this? Any thoughts? Thanks!

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser – The Thermostat Answer

I get questions like this all the time which people email to me and it is difficult to give them a good answer simply because I’m not there observing this strange equipment or thermostat behavior. It sounds to me that you’ve eliminated the problem being the thermostat when you changed them out. You know the one in the other zone doesn’t exhibit the same behavior and the one in the zone giving you the problem didn’t exhibit the bad behavior (or three degree burst as you describe it) when you changed it to the other zone. At least that is how I’m reading it. You eliminated the Honeywell Chronotherm Plus thermostat as being the problem

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser – Back to the Basics

I would go back to basics on this one and check the installation location of the Honeywell Chronotherm Plus. A thermostat should be located in a central located on an inside wall preferably as close to the return as possible. It should never be mounted where direct sunlight can hit it, on an outside wall, or near a window or door which leads outside. If that is okay then check the wall where the thermostat is mounted. The hole behind the Honeywell Chronotherm Plus thermostat? Is this a drafty hole where air comes in through crawl space or attic somehow? If that is the case stuff some insulation in the hole to prevent the drafty air from hitting the thermostat. Seal it off as best as you can to prevent this drafty air from hitting the Honeywell Chronotherm Plus thermostat. Offers residential commercial high performance HVAC advice concerning air conditioning heating Honeywell Chronotherm thermostat troubleshooting along with the Trane XV-90.

Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser – Lastly, Call in the Pros

Honeywell Chronotherm Plus Thermostat with a Trane XL19i CondenserThe next thing to do if this doesn’t solve the thermostat problem is to have an HVAC professional check the furnace out completely. I would schedule an appointment with you for morning furnace warm-up so I could observe this behavior myself. I would eliminate thermostat and control the furnace at the furnace to see if it still did this. The Trane XV-90 is a high efficiency model so you will an HVAC specialist to look at it. Preferably someone who has had some Trane factory training. These guys are not hard to find as Trane does a pretty good job of offering contractors classes for their HVAC Technicians. I believe it is requirement for Trane dealers (HVAC Contractors) to send their Technicians to so many classes every year so call a Trane dealer and ask for their best technician to look at this problem.

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Honeywell Chronotherm Plus Thermostat – Trane XL19i Condenser