The First String Denver Heating and Air Conditioning Blog

Why Is My Furnace Filter Black?
Is your furnace filter black? There are a few reasons why your furnace filter may be turning black. So, what can you do about a black filter?

Furnace Vs. Fireplace Which One is More Efficient
Let us compare furnace vs fireplace to help you make the best decision for your home. Stay warm this winter with the most efficient heating!

10 Reasons You Need A Furnace Tune-Up
Here are ten reasons you need to schedule a furnace tune-up today. You need to make sure your furnace is in good condition.

Are UV Air Purifiers Worth It?
Looking for ways to improve the air quality in your home, an air purifier is a great option. What you need to know about UV air purifiers.

Do I have a Furnace or a Heat Pump?
Do I have a Furnace or a Heat Pump? Many people are unsure of the difference between the two and often use the terms interchangeably.
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