Graham Irwin
  • Fairfax, CA
  • United States
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Latest Activity

Graham Irwin commented on Chris Laumer-Giddens's blog post Insulating a Slab-On-Grade in Hotlanta
"It's pretty hard to find a place in the US where the soil temperature is "perfect." In most cases, it's either too cold, or too hot, as the map here…"
Feb 1, 2016
Graham Irwin replied to Tauran Ivall's discussion Energy Efficient Entry Door options out there?
"Hammer and Hand make beautiful, high-end, super efficient and durable custom doors. These doors are not mass-market (hence the "custom" part) but they are much better than most custom doors available out there. The people who are in the…"
Nov 27, 2015
Graham Irwin replied to Tauran Ivall's discussion Energy Efficient Entry Door options out there?
"Oh, and to eliminate the leaky "sweep" gasket at the sill, we used an outswing door (with a bumper sill) installed backwards. Note that this only works under a deep porch, since the "inside" of an outswing door will not shed…"
Nov 27, 2015
Graham Irwin replied to Tauran Ivall's discussion Energy Efficient Entry Door options out there?
"On this Passivhaus retrofit in Santa Cruz (http://midorihaus.com) we used Plastpro (http://www.plastproinc.com). The have triple point latches as an option. They worked out pretty well and were reasonably priced."
Nov 27, 2015
Graham Irwin commented on Home Energy Magazine's blog post Revisiting Electrification
"As we move toward more and more renewable energy in the grid, storage will be a key issue. The biggest challenge is providing renewable energy in winter, when solar energy is lowest. Not coincidentally, that's also when heating demand is…"
May 7, 2015
Graham Irwin posted an event

Passive House: Building A “Renewable Ready” California at Online

May 12, 2015 from 1pm to 2pm
In this webinar we will discuss cost­‐optimized, high­‐performance homes that meet the “Passive House standard” and how this can be achieved throughout California with minimal additional effort and cost. Attention will be paid to the economies of scale and construction cost reductions available in multi-family Passive House buildings.See More
Apr 30, 2015
Graham Irwin replied to George Kopf's discussion How does efficiency factor into a grid parity world?
"John, Interesting though, if you read this NREL article (https://financere.nrel.gov/finance/content/germany-solar-feed-in-ta...), it would suggest that we are spending as much as Germany per installed kW if federal tax credits and accelerated…"
Oct 23, 2014
Graham Irwin replied to George Kopf's discussion How does efficiency factor into a grid parity world?
"George, You raise a good question. The concept of "free and unlimited" energy is not new, in fact it is arguable that this idea is what got us into the trouble we're in to begin with (http://en.wikipedia.org/wiki/Too_cheap_to_meter).…"
Oct 23, 2014
Graham Irwin replied to Christopher Talarico's discussion Heating with Tankless Water Heater & Hydronic Air Handler vs. Gas Furnace
Sep 4, 2014
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Great information, thank you!"
Aug 5, 2014
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Useful information is the Coefficient of Performance (COP) of the whole house fan vs. alternatives. The true answer is more complicated than that, since all equipment has a COP "curve" that flattens out as the delta-T between inside and…"
Aug 5, 2014
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Thanks for the input. The next question to ask is "how much cooling power is delivered in each case?" Whole house fans work best when the house is hot and the air is cold. Either of those things change and they work less well. I am not…"
Aug 1, 2014
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Kurt, The "large fan" is a whole house fan moving anything from 1000-4000 CFM. By comparison, the ventilation system for the T24 prototype home we modeled was 67 CFM. As you might imagine, a fan that moves 1000-4000 CFM could use a lot of…"
Aug 1, 2014
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"I think it is important to check the energy consumption of such a large fan, even assuming it can be properly air-sealed and insulated. We are finishing up a study on 2013 Code vs. Passive House in each of California's climate zones and, while…"
Jul 31, 2014
Graham Irwin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
May 1, 2014
Graham Irwin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Good point, but the Passive House system is also running continuously, which would tend toward higher capture efficiency as contrasted to a situation with low vented range hood usage. While the intermittent rate may be higher, its duty cycle may be…"
May 1, 2014

Profile Information

Company
Essential Habitat
Professional Certification
Passive House Designer & Consultant
Website URL
http://www.essentialhabitat.com

Comment Wall (1 comment)

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At 3:09pm on January 6, 2011, Diane Chojnowski said…

Hi Graham,

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos andupcoming events. If you're blogging about home performance, this is the
place for you!

Don't forget to upload your profile photo. And,add your location on our Member Map!

Thanks!
Diane, HEP Moderator

 
 
 

Forum Discussions

Mini split air conditioners and ceiling fans

Started by Beverly Lerch in General Forum. Last reply by Daniel Baur-McGuire yesterday. 4 Replies

DIY Filter Solution for an Evaporative Cooler, anyone?

Started by Leslie Jackson in HVAC. Last reply by Daniel Baur-McGuire yesterday. 6 Replies

VERY TIGHT HOME WITH OVER SIZED AC

Started by Jerry Needham in BPI. Last reply by Tim O'Brien yesterday. 5 Replies

Apply now for the Jon Siemen Memorial Scholarship!

Started by Diane Chojnowski in General Forum. Last reply by Quinn Korzeniecki on Thursday. 1 Reply

Log home roof insulation

Started by Bob Reuther in Best Practices. Last reply by Bob Reuther Aug 7. 10 Replies

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Franco Oyuela commented on Shawn Weeks's blog post How Homeowners Can Keep Electricity Costs Down in Summer Months
"Cutting back on air conditioning is also good for the environment because it reduces carbon…"
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Franco Oyuela commented on John White's blog post Top Reasons to Consider Seasonal HVAC Maintenance
"They say an ounce of prevention is worth a pound of cure, and when it comes to HVAC units, this…"
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Diane Chojnowski's video was featured

1950s Home Retrofit to Super Efficient Passive House - Urban Green Building

This 1950s Montreal house was retrofitted to become a super efficient passive house by adding a 16 inch thick layer of cellulose insulation to the exterior. Maison Ozalée's builder, Richard Price from Construction Le Tournesol, also used triple…
21 hours ago
Diane Chojnowski posted a video

1950s Home Retrofit to Super Efficient Passive House - Urban Green Building

This 1950s Montreal house was retrofitted to become a super efficient passive house by adding a 16 inch thick layer of cellulose insulation to the exterior. ...
21 hours ago
Profile IconSara Melucci, Hayden Sloan and Jediah Krajcik joined Home Energy Pros Forum
yesterday
Daniel Baur-McGuire replied to Beverly Lerch's discussion Mini split air conditioners and ceiling fans
"Running a ceiling fan actually heats up air. Allison Bailes has some great articles on it.  I…"
yesterday
Daniel Baur-McGuire replied to Leslie Jackson's discussion DIY Filter Solution for an Evaporative Cooler, anyone?
"Where are the supply runs located? Look to make sure supply runs are sealed. I would second having…"
yesterday
Tim O'Brien replied to Jerry Needham's discussion VERY TIGHT HOME WITH OVER SIZED AC
"New build may not have been "dry" before finished and occupied. Residual moisture from…"
yesterday
Daniel Baur-McGuire replied to Jerry Needham's discussion VERY TIGHT HOME WITH OVER SIZED AC
"Oversized A/C systems wont pull out enough moisture from the conditioned air. I would check to make…"
yesterday
Efficiency First California's blog post was featured
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Laurie DiDonato posted a blog post

HERS Rater Training Discount ($200) Ends August 20th!

Online: September 17-28th (Times TBA)Classroom: October 1-5th in Manchester, NHFull fee: $2595…See More
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Franco Oyuela commented on Fresh Air Duct Cleaning's blog post Moving in to a new home and why you should get a Duct Cleaning
"There is no evidence to suggest that clean ducts leads to better overall health. However, it should…"
Friday
Franco Oyuela replied to Beverly Lerch's discussion Mini split air conditioners and ceiling fans
"Using a ceiling fan as part of a team to bring your maximum home cooling comfort. Adding a ceiling…"
Friday
Beverly Lerch replied to Beverly Lerch's discussion Mini split air conditioners and ceiling fans
"Thank you.  Good information about the ceiling fans."
Thursday

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