Christopher Cadwell's Blog (9)

HVAC and DC Fan Motors

Here are links to my latest posts on how these motors can be used for retrofitting in existing HVAC systems.

HVAC Savings Upgrades – Cutting Fan Watts In Half or More 

In this post I cover how the savings can be dramatic, and the most important part is to get duct pressures low.…

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Added by Christopher Cadwell on April 19, 2012 at 6:14am — 2 Comments

Part 2 of: The "1-2 Punch" to HVAC "Not Understoods"

Proper sizing of HVAC equipment is smaller, and smaller means more comfort.

Probably the usual thought in the HVAC industry by technicians is that the units need to be made bigger for comfort. Perhaps this comes from the idea of coming home from work, and needing a set back thermostat to do its magic, and get the home comfortable fast,…

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Added by Christopher Cadwell on December 13, 2011 at 8:30am — 4 Comments

Part 1 of: The "1-2 Punch" to HVAC "Not Understoods"

HVAC Delivery System Losses -

This is the Air Pressures, Duct System, the Boots, the Registers, Equipment Cabinets, Air Balancing, Temperature rise and drop parameters, etc. 

 

This is a greatly overlooked and not understood part of a system, even by most HVAC Journeymen and contractors. How do we come to this conclusion?…

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Added by Christopher Cadwell on December 1, 2011 at 10:04am — 1 Comment

Notable Results in AC Training

The final survey results of the second week of students in the High Performance HVAC classes.
Here are some notable results of what the students felt that they got out of the course.
  • How to reduce # of registers while improving comfort. 
  • Importance of velocity - amount needed to properly mix air.
  • How to select register types to control noise and performance. 
  • Whole house as…
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Added by Christopher Cadwell on November 27, 2011 at 9:00pm — No Comments

Zero Duct Leakage - Yes it is Possible.

What does this mean? How can we get to zero duct leakage?

 

When the testing equipment is not small enough to accurately measure the leakage - then it is called zero - usually below 10 CFM of leakage.

Essentially every seam of all the metal and every inside connection of the…

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Added by Christopher Cadwell on November 22, 2011 at 10:30pm — No Comments

Another Week of Awesome AC Training

Another week ahead with the master HVAC installer and trainer - Rick Chitwood.

This is no ordinary course room.* This is the house about to be retrofitted. We just got through the day of reasoning on the background as to why we install AC in…

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Added by Christopher Cadwell on November 22, 2011 at 6:30am — No Comments

Super Efficient HVAC is Easy

Attending a week long class where veteran trainer Rick Chitwood is moderator has been entertaining and joyful. In the class which is inside a house that is being retrofit completely we are now designing and installing a super efficient HVAC system.…



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Added by Christopher Cadwell on November 17, 2011 at 9:30pm — 9 Comments

Efficiency - What's missing, maybe?

What can we learn and use from world class organizations, and how they got there? How does this apply to energy efficiency rating and auditing?

The bottom line: They produced and sold what the customer actually wanted and was willing to pay for. There are a lot of other things they did, but all complexities funneled back into the purpose of delivering something…

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Added by Christopher Cadwell on November 9, 2011 at 8:00am — 2 Comments

Selling AC Retrofits - Notes from the field.

First I talk of safety. I mention old furnaces and CO possibilities, etc. This will usually make them sour up a bit because it is slightly a sales pitch.

Then I usually talk to homeowners about the hot and cold rooms. This is a big button and an easy one to push and get them talking. This adds to the sourness but gains…
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Added by Christopher Cadwell on October 25, 2011 at 10:30pm — 1 Comment

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Latest Activity

Lindsay Bachman posted events
21 minutes ago
Derrick Koehn's video was featured

How Technology and Innovation Are Making Outdoor Wood Burning Stoves More Efficient and Environmentally Friendly

Introduction Since ancient times, wood burning has been used for heating in some capacity or other. Although, of late, wood stoves are thought of more as a decorative appliance than a heat source, in truth wood heat is still one of the most…
1 hour ago
Efficiency First California's blog post was featured
1 hour ago
Diane Chojnowski's event was featured
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Better Buildings Peer Exchange Call: Home Improvement Catalyst: Keeping the Ball Rolling with Homeowners by Delivering More Value at Eastern Time

September 21, 2017 from 1pm to 2:30pm
Thursday, September 21 1-2:30pm Eastern TimePlease join this Peer Exchange call to…See More
1 hour ago
Diane Chojnowski posted an event
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Better Buildings Peer Exchange Call: Home Improvement Catalyst: Keeping the Ball Rolling with Homeowners by Delivering More Value at Eastern Time

September 21, 2017 from 1pm to 2:30pm
Thursday, September 21 1-2:30pm Eastern TimePlease join this Peer Exchange call to…See More
1 hour ago
Lindsay Bachman is now a member of Home Energy Pros
5 hours ago
Gregory Cisco replied to Gregory Cisco's discussion Abandoning under-slab HVAC ductwork which fills with groundwater seasonally.
"We looked into this. Quite expensive and the applicator would not make any guarantees. Looking…"
Tuesday
Gregory Cisco replied to Gregory Cisco's discussion Abandoning under-slab HVAC ductwork which fills with groundwater seasonally.
"That is what I was thinking. Looking into Flo Fill. Probably using two pours - the first would…"
Tuesday

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