Important Message from Our CEO:

Hi Patriots,
Does the snow melt between your outdoor boiler and your home like this?
This may be normal if you recently installed and back filled your underground pipe since the earth was disturbed and is still settling. Remember that heat is always escaping the earth and it will take the path of least resistance - so the heat from the earth will melt snow over ground that has not yet settled FIRST.

But, if your underground pipe is not waterproof, your pipe will fill with water. This will SUCK HEAT away from your tubing between the boiler and the house. You may have 180 degree water leaving the boiler, but only 140 degree water arrives into the home! Not good.

The earth will absorb an infinite amount of heat. So if your underground pipe is not waterproof, how much extra wood are you burning to heat the ground?

There are easy ways to test for this heat loss. See our article below for the simple test.

But BLACK outer casing of underground pipe is drain tile, and drain tile is not manufactured to be waterproof! Drain tile has pinhole leaks throughout and it doesn't matter for what drain tile is normally used for. But if FAILS when used as underground insulated PEX pipe. We call it "Do-Over Pipe" because you will likely have to do it over!

Our Insulated PEX has only a WHITE outer casing. This stuff is made in Canada where they know how to make a product that survives the cold, frozen ground. Only WHITE outer casing is reliable and waterproof!

We are getting another crazy cold Arctic Blast coming next week here in Michigan with frigid single digit temps on the way - Stay Warm! Maybe a few laughs will help warm you HERE!


All the best,

Why Does Snow Melt Between My House and Outdoor Boiler?  
We get this question often and the answer is usually one of THREE possible answers:

1. You are losing heat underground because you have low quality pipe (NOT purchased from of course!)
2. You recently installed your underground pipe (this is NOT lost heat from your underground pipe, but rather heat escaping from the earth via the path of least resistance - the earth you disturbed while trenching. This will go away after the ground settles.)
3. You are losing heat underground because you have a LEAK in your outer casing. Water fills the outer casing, sucks heat away from your PEX tubing, and that heat gets absorbed by the earth - and the earth can absorb an infinite amount of heat!

Often, people install new underground insulated PEX, and during their first winter, the snow melts between their house and outdoor boiler. And they think they have a problem! 

Do not worry! The solution is to measure if you are losing any heat underground with a simple test - we call this the "Delta-T Test". See instructions below to complete this simple test, and you will likely have peace of mind knowing that you are not wasting fuel.

In summary, here are the possible causes, and the recommended solutions:

Reason Snow is Melting



.1) You may be losing heat underground because you have low quality pipe

Low quality components will not provide the insulation value you need to prevent heat loss.


Click HERE to watch this video and upgrade!


.2) You recently installed your underground pipe

This is NOT lost heat from your underground pipe, but rather heat escaping from the earth via the path of least resistance - the earth you disturbed while trenching.


This will go away after the ground settles. You can do the Delta-T Test just to be sure.

.3) You are losing heat underground because you have a LEAK in your outer casing

Water fills the outer casing, sucks heat away from your PEX tubing, and that heat gets absorbed by the earth - and the earth can absorb an infinite amount of heat!

Click HERE to watch this video for explanation.


 Here is the Delta-T test procedure that can be used to see if you are wasting wood by losing heat underground: 
Wondering: Am I Wasting Money? Am I Losing Heat Underground?
Try This Simple Test...

You can check your underground pipe for heat loss in about 5 minutes. This is called a “Delta-T” test which is simply a measurement of how much heat is lost through your underground pipes into the earth, or the air. The instructions for the Delta-T test are as follows:
  1. MAKE SURE ALL LOAD IS TURNED OFF.  All unit heaters and furnaces must be disabled, and no hot water faucets can be open during the test. Make sure nobody is taking a shower, and your furnace blower fan are off, otherwise the test results are useless.
  2. Using a digital thermometer, take temp readings at the back of the furnace on BOTH the Feed Line and Return Line.
  3. When taking readings, apply temp sensor, cover with insulation, and secure in place with Velcro or tie strap.  Make sure sensor is touching metal surface. Leave attached at least 90 seconds or until temp stops rising on readout display, whichever is later.
  4. For FEED LINE, apply temp sensor to fitting or pipe close to furnace back wall.  We want the true furnace water jacket temp, before any heat loss from the pipe.
  5. For RETURN LINEapply temp sensor to fitting or pipe at least 4 inches from furnace body.  We want the temp coming back from the line, before it mixes with the water in the water jacket.
  6. Do NOT use an infrared thermometer on PEX or PAP tubing. It will not give an accurate reading. An Infrared thermometer can only get accurate readings on metal fittings or pipe.
  7. Record these readings. If you see temp differences larger than one degree per 100 feet of underground pipe, you are experiencing larger heat loss than is acceptable.

If your heat loss is TOO HIGH, you should consider replacing your underground pipe. Be sure to only use Heat Mizer brand pipe from so you can maximize your savings for decades.

Contact for more information M-F from 9am-8pm at (888) LOG-BURN / (231) 861-8200.


HEAT MIZER - Underground Insulated PEX

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Our goal at is to help you realize the best return on your investment!  We have invested MILLIONS in research, testing, and proving our designs and methods. We want YOU to benefit from all we have learned!

You made a big investment in your furnace system so you deserve to realize a great return on that investment!

Here is your exclusive access to the answers to any question you may have on your outdoor boiler:  Just click HERE, and type your question in the search bar, and your answer will appear before your eyes! This is the most powerful tool known to the Outdoor Boiler industry.

Also, learn more about how to extend the life of your outdoor boiler by visiting our DIY Section by clicking this link HERE. Here are a few examples of some of the great articles available that are trending now:  

Definitive Outdoor Boiler Ownership Guide

Complete Guide to FREE Water Testing  

3 Biggest Installation Mistakes with Your Outdoor Boiler

3 Worst Maintenance Mistakes You Can Make with Your Outdoor Boiler  

Not Getting Enough Heat or Savings? Upgrade or Redesign for FREE

Are You Losing Heat Underground? How to Test For This

World's Best Underground Insulated PEX

Don't Void Your Warranty - Top 10 Critical Reminders

EPA Rules on Outdoor Boilers Change in 2020 - Here is What You Need To Know

Top 5 Ways To Get the MAX Savings From your Boiler This Year

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Don't Be THAT Guy Who Regrets Doing This - The DRY BURN Procedure

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Regardless of where you are in your journey saving money by burning wood, you can benefit from having answers to your questions. This is how we can help. Here are some resources we provide:

So be sure to take advantage of all the resources we have for you. We have invested millions in research and development of outdoor boilers and nobody knows more than your experts at!

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Our goal at is to help you realize the best return on your investment!  You made a big investment in your furnace system so you deserve to realize a great return on that investment. Visit our online store at for all the resources you need to protect your investment. 

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