“Which way does the air flow on a furnace?” This is what we should always ask ourselves when installing a furnace air filter. Furnace airflow direction is very easy to figure out with just 1 rule that applies to all furnaces and all filters. You don’t need to stick your hand into the air filter … Read more
We get a lot of these upflow vs. downflow furnace questions. It’s about time we address what is the difference between upflow and downflow furnace. Let’s get into it by first pointing out the main difference (all the consequences, efficiencies, etc. flow from this 1 difference): Upflow furnace produces a down-up direction of airflow. Downflow … Read more
“I know I have to point the air filter arrow in the direction of airflow. But what happens if the air filter is backward? Is it just a minor thing or can it blow up my furnace?” Yes, furnace filter backward question. To be absolutely clear: don’t do it. Anybody who turned their air filter … Read more
“How to install an air filter? Which way should the arrow point?” Furnace filter direction. We all know that the air filter has to be installed in the right direction. That’s why that arrow on the furnace air filter is added (saying ‘Point the arrow in the direction of the airflow’). Despite that, many homeowners … Read more
Choosing the best MERV rating for furnace filters is the #1 thing you need to do. Selecting between MERV 4, MERV 6, MERV 8, MERV 11, MERV 13, and so on, is not all that easy. To help you out, we are going to look at what the MERV rating on furnace filters actually is, … Read more
When the furnace filter gets dirty, you have to change it. This is clear to everybody. What is not so exactly clear is what does a dirty furnace filter look like exactly. Let’s have a look at which furnace filters are actually considered “dirty”. As you well know, the dirt from the air will inevitably … Read more
Gas furnaces can use quite a lot of electricity. This may come as a surprise. Gas furnaces use natural gas or propane to produce heat, right? Why would we talk about how many watts does a gas furnace use if it doesn’t run on electricity? Simple: For heat production, gas furnaces do use natural gas … Read more
How to know what age is your Carrier HVAC unit? If you have an old Carrier air conditioner or Carrier furnace, it’s not all that easy to tell how old it is. We are going to look at how you can use the Carrier serial number to find out exactly what year (even month, or … Read more
Having a bad furnace flame sensor can be quite dangerous. Without a properly functioning flame sensor, natural gas or propane can leak into your home and be accidentally ignited. That’s why it is very important to know how to tell if a flame sensor is bad. Flame sensor troubleshooting is usually done by an HVAC … Read more
Furnaces are HVAC heating units that usually last very long. How long do furnaces last? Here’s the short answer: Furnaces can last from 5 to 30 years. That’s quite a broad furnace lifespan range. Most furnaces will last anywhere from 10 to 20 years. Most homeowners would like their furnace to last 30 years and … Read more