Samurai Appliance Repair Man's Blog

Presents Another Award-Winning Issue of...

As the temperatures drop, folks all around the country are firing up their furnaces to keep out the cold. This issue of Appliantology offers you some tips for keeping your furnace running at peak efficiency and some resources for repair help and parts in case your furnace breaks.

Replace Your Furnace Filter Now

This is the single most important and easiest thing you can do to keep your furnace running right.

One of the biggest complaints with forced hot air furnaces is that air inside the house can become laden with dust mites and micro allergens from the recirculated air. You can cut way down on these allergens and breathe easier if you replace your furnace filter with a high-efficiency, micro allergen reduction filter. More on that later. First, here are...

Three Reasons to Change your Furnace Air Filter Regularly

Air filters prolong the life of your furnace by keeping harmful particles out of the blower motor and heat exchanger. The blower motor can burn out if not kept clean and costs more than $200 to replace. Additionally, by not changing your filters every month, you can do the same damage to your unit’s motor by restricting the airflow needed to prevent the motor from being overworked. Considering the potential costs of repairs, filters are very inexpensive.

The second reason for changing your air filters regularly is to cut down on your energy cost. A dirty air filter can increase your energy cost by 35% by causing the furnace to work harder and run longer to maintain the desired temperature.

3. Promote better air quality in your home.

The third reason to change your air filters regularly and upgrade to a higher-grade filter is that it promotes better air quality in your home. Replacing your filter on a regular basis will cut down on airborne particles that can aggravate allergies and carry viruses.

It's important to note that all filters are not created equal and there are several different types of filters to chose from. How do you chose the right one for you? I'm glad you asked…

Types of Furnace Air Filters – How to Choose One Right For You

Typically, air filters are rated by the size of the particles they can remove. Most good furnace filters can easily remove particles larger than 10 microns in size, but the best filters are able to remove particles smaller than 3 microns. One micron is one millionth of a meter or approximately 1/25,000 of an inch. For comparison, a human hair is about 70 microns thick.

Most pleated filters have a performance rating that is assigned a number to indicate the level of effectiveness. Generally the higher this number is, the higher the performance of the filter.

Different manufacturers use different performance ratings but 3M's MPR rating is emerging as the industry standard. MPR stands for Micro-particle Performance Rating. The 3M MPR rating focuses on the smallest and most troublesome particles - those between 0.3 and 1.0 Microns in size. Generally speaking, a filter with an MPR of 1000 is twice as effective at removing those tiny particles as a filter with a 500 MPR.

The flat panel fiberglass filter, such as this one, is the lowest cost filter available under $1.50 retail each. This is the least effective filter in terms of particle filtration, but is good for protecting equipment if changed regularly. Flat panel filters are designed to catch only larger particles, allowing smaller particles to pass through. Flat panel filters have no performance rating due to their low efficiency. The recommendation is to replace flat panel filters every 30 days.

The second type of filter is the basic pleated filter like this 3M 300 Dust Reducing filter. Compared to flat panel filters, the pleated filter is 5 times more effective in catching the airborne particles than flat panel filters allow to pass through. The retail for a basic pleated filter is under $5.00 each. Because they catch smaller particles, they are more efficient than fiberglass filters. They reduce energy costs by keeping your unit cleaner, as well as keeping your air quality at a higher standard. Basic pleated filters, based on testing of residential systems, need to be replaced every 30 days. The MPR rating on basic pleated filters ranges from 300 to 500.

The best type of filter we will discuss is the electrostatic pleated filter like this 3M 600 Dust and Pollen reducing filter or this 3M 1000 Micro Allergen filter all the way up to 3M's top-of-the-line 2200 Elite Allergen Reduction filter.

Electrostatic filters have media that is charged with electric current during the manufacturing process, allowing the filter to attract smaller particles; much like a magnet attracts metal. 3M electrostatic filters have both positive & negative charges to attract dust no matter which charge it holds. Electrostatic filters are up to 18 times more effective than flat panel filters and have MPR rating of 600 to 2200. The average retail on this type of filter is from $7.86 to $ 10.96 each. These filters are designed to be replaced every 90 days. Considering the lifespan of these electrostatic filters, they not only do a better job of cleaning the air in your home but the cost less on a monthly basis because they don’t have to be changed as often.

Broken Furnace? Get Repair Help!

If your furnace does stop running or isn't running right, come get interactive repair help in the HVAC Forum at the Appliantology Academy.

Our friends at RepairClinic.com, the premiere online source for appliance parts, now offer furnace parts for Carrier, Lennox, and York with the same awesome, hassle-free one-year return policy that they offer on appliance parts! To shop for furnace parts, click here.

For your convenience, here are direct links to the three most common types of furnace parts that you'll need to replace:

1. Furnace Circuit Boards

2. Furnace Limit Thermostats

3. Furnace Blower Motors

Samurai Appliance Repair Man, www.Appliantology.org