What I'm Seeing Now

head_left_image

The HVAC Register Was Not Blowing Air. What's Up?

The HVAC register was not blowing air.  What's up?

Was the duct blocked?

If air was blowing, where was it going?

In this house this particular room was cold.  Reaching up to the register I could not feel any moving air, but I could feel that the register was hot when I touched it.

So air was at least arriving to the spot.

But where was it going and how would I know?

I would break out Mighty Mo!

And I did!  This is the perfect thing for a thermal camera to analyze.

Looking at the register this is what the thermal camera could see.

There was heat arriving to register and blowing into the cavity above the drywall!  That heat was fanning out in all directions the air flow was allowed to go.

Why?  There was a leak!  An air leak.  And likely because the duct had come loose from the register hood.

The image shows the joists above the register, which can be seen as blurry, blue lines.  That round thing is a ceiling canister light fixture. 

While the register is the warmest thing around it was not very hot by comparison to what it would be had the air been blowing right onto it.  The house had a new heat pump, so the air would be in the 125F area.  That the register was only 86F would indicate that more air was leaking than arriving to the register.

My recommendation:  a thermal camera can analyze many things.  Where HVAC air is going would obviously be one of them!  My thermal camera is the sharpest arrow in my quiver.  With it I can analyze many things, from plumbing to roof to electrical to mechanical to insulation.   A thermal camera is not a point and shoot device!  It requires real training and practice, practice, practice.  The cameras and training are not cheap!  And learning how to analyze the images is a little bit art and a little bit science.  Seven years ago I wrote a post on that point which you can read here.  Enjoy.

 

 

Jay Markanich Real Estate Inspections, LLC  

Based in Bristow, serving all of Northern Virginia.

Office (703) 330-6388   Cell (703) 585-7560

www.jaymarinspect.com


Comment balloon 16 commentsJay Markanich • March 12 2017 11:42AM
The HVAC Register Was Not Blowing Air. What's Up?
share
The HVAC register was not blowing air. What's up? Was the duct blocked? If air was blowing, where was it going? In this house this particular room was cold. Reaching up to the register I could not feel any moving air, but I could feel that the… more
What Could Cause So Much Moisture In A Bay Window?
share
What could cause so much moisture in a bay window? The underside of the bay window was bulging. Pushing on it the material was very soft and felt wet. It had rained the night before. Measuring with the moisture meter the needle jumped to >30%,… more
Does This James Hardie Siding Installation Look Right?
share
Does this James Hardie siding installation look right? All over this new construction I saw things seen in these photos. If it doesn't look right, you can bet it isn't! And if you were the buyer what would you think? Siding members should not be… more
How Often Should The HVAC Filter Be Replaced Or Cleaned?
share
How often should the HVAC filter be replaced or cleaned? The rule of thumb is once a month. Obviously there are months where temperatures are such that the unit does not get a lot of work. So during those months the filter would not need attention… more
Can Composite Decking Rot?
share
Can composite decking rot? If you go to the composite manufacturer websites will tell you their products do not rot. If you search on line and find home repair websites, or forum websites, you will read that there are complaints all over the country… more
"All Our Houses Are Built Strictly To Code… " Part 2
share
"All our houses are built strictly to code… " Part 2. That was the focus of the previous post which considered the idea that we have been conditioned to accept a minimum standard in so many things. And we have been conditioned to… more
"All Our Houses Are Built Strictly To Code… "
share
"All our houses are built strictly to code… " That's what the young supervisor said to me and my clients when he showed up at the end of our pre-drywall inspection. Me - "Are you sure you want to say that? " Supervisor, smiling… more
This Was A Highly-Touted, And New, Hardwood Floor
share
This was a highly-touted, and new, hardwood floor. And it looked great everywhere! It was a very professional job. Except in the powder room. The toilet wobbled. And there was a hefty and dark stain behind and beside the base of the toilet. Since… more
This Is A Beautiful Light Fixture! But Don't Forget The Insulation!
share
This is a beautiful light fixture! But don't forget the insulation! This is new construction. The entry way featured an open ceiling with a circular, wrapping staircase leading to an upper level hallway that serviced all the bedrooms. A very… more
This Is The Most Attractive Clean Out Port Cover I Have Ever Seen!
share
This is the most attractive clean out port cover I have ever seen! A local builder who designs and sells only a couple of houses a year hires me to do inspections when the houses near completion. He considers it to be another layer of protection… more