Hans Joachim Preiss
  • Male
  • Boulder, CO
  • United States
Share on Facebook Share on Facebook Share Twitter

Hans Joachim Preiss's Friends

  • Jennifer Lawrence

Hans Joachim Preiss's Groups

 

Hans Joachim Preiss's Page

Latest Activity

Hans Joachim Preiss replied to James Murray's discussion Ductless Heat Pump vs Radiant
"We should mention that Transformations' homes in MA have 12" Double Studded R-45 Low Density Foam Walls and typically not a lot of glazing. An 1,800 sqft home may have two mini-splits on the first floor and one on the second…"
Feb 24
Hans Joachim Preiss replied to James Murray's discussion Ductless Heat Pump vs Radiant
"Quality of life is very important to me, and I am trying to convince my customers that 'you get what you pay for'. But each their own and I don't think we're adding value to James' question above. Cheers!"
Feb 23
Hans Joachim Preiss replied to James Murray's discussion Ductless Heat Pump vs Radiant
"James wrote 4800 HDD, which I would not consider a mild climate. Super insulated homes can achieve heat loads so low instead of a geothermal vertical well a slinky can be installed under the foundation at very little cost bringing the price for…"
Feb 23
Hans Joachim Preiss replied to James Murray's discussion Ductless Heat Pump vs Radiant
"Do you have any need for cooling or dehumidification? If you don't, I don't see that this would be an application for a ductless heatpump.   You're correct that radiant will not create a temperature gradient between floor and…"
Feb 20
Hans Joachim Preiss commented on Brian Brainerd's blog post Is the Nest Learning Thermostat Disruptive Technology?
"Hardly anybody thought of their thermostat as being dumb and unattractive before NEST showed up. Many people thought thermostats could be improved and that their user interfaces were stuck in the stone age, but not many worked on improving them -…"
Jan 24
Hans Joachim Preiss commented on Brian Brainerd's blog post Getting Out the Message on Home MPG
"That's absolutely where we need to get to in order for energy efficiency improvements to pay off when selling the home. But currently there are so many ways to cheat. E.g. when I know I'll be selling my house next year, I'll turn the…"
Jan 17
Hans Joachim Preiss joined Tom White's group
Thumbnail

Weatherization

Share your concerns and successes as a weatherization professional, or information for this community.
Dec 3, 2013
Hans Joachim Preiss joined Evan Mills's group
Thumbnail

Resale Value

Prove to us that enhanced home energy performance translates into enhanced resale value!See More
Dec 3, 2013
Hans Joachim Preiss joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what needs to find it's way to the dust bin of history?See More
Dec 3, 2013
Hans Joachim Preiss joined Diane Chojnowski's group
Thumbnail

Hall of Shame

In this group, members share an array of images from the field, showing the kinds of issues encountered by home performance professionals in real homes. Each tells a story of how hidden (but fixable) problems in homes can cause high energy bills.
Dec 3, 2013
Hans Joachim Preiss joined Allison A. Bailes III's group
Thumbnail

HVAC

HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements, and more. Since heating & cooling are such a big part of home energy use, understanding HVAC is critical.See More
Dec 3, 2013
Hans Joachim Preiss replied to Johnny Ritzo's discussion Selecting a Water Heater
"Could it be that you have a boiler with tankless coil? Boilers are for hydronic heating, furnaces are for forced air heating. Is this a single family residence? Will you live in it or rent it out? Year round use? How many bathrooms, fixtures, what…"
Jun 8, 2013
Joachim Preiss just added their location.
Nov 12, 2010
Hans Joachim Preiss updated their profile photo
Nov 12, 2010
Hans Joachim Preiss is now a member of Home Energy Pros
Nov 3, 2010

Profile Information

Company
BrightSense
LinkedIn Profile
http://www.linkedin.com/pub/hans-joachim-preiss/0/782/863/

Comment Wall

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

  • No comments yet!
 
 
 

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Bob Blanchette posted a discussion

Dual Fuel Systems, at what point do they make sense?

Heat Pump with furnace backup. These make no sense in our area with local NG rates, but they do…See More
1 hour ago
Bob Blanchette joined Hal Skinner's group
Thumbnail

The RCC Classroom (Radiant Control Coatings)

A group where energy professionals can learn about all the different energy saving aspects of…See More
1 hour ago
Shashank Kirloskar posted a blog post

Important Facts about Solar Energy

“I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait…See More
yesterday
reflintorm replied to Dennis McCarthy's discussion Solid state lighting - saves lives- and it improves life .
"In my observation, In most of the lightning appliances led bulbs are used because of their…"
yesterday
Chad Mcaulife posted photos
yesterday
Bob Blanchette commented on Jeremy Begley's blog post The Home Envelope : Does it Really Matter in a Heat Loss Calculation
"Infiltration makes a HUGE difference. Look at the heat loads on a windy day vs. a calm one. On a…"
yesterday
Bob Blanchette commented on Everblue's blog post Poor HVAC Installation Leads to Increased Energy Use
"That explains a LOT of why HVAC system continue to be sized by the same "rule of thumb"…"
yesterday
Profile IconChristian Asdal and Shashank Kirloskar joined Home Energy Pros
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service