Bob Blanchette
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  • Oklahoma City, OK
  • United States
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Condenser placement effect on efficiency
3 Replies

Does locating an AC condenser out of the sun (east vs. west side of house) make significant difference in real world efficiency? Does anybody have a link to a case study?Continue

Started this discussion. Last reply by Bob Blanchette Jul 17.

Tankless Water Heaters... has their time finally come?
32 Replies

For decades tankless water heaters haven't been worth the effort to install due to our artificially low cost of natural gas in the USA and the high price of tankless heaters. Tankless water heaters…Continue

Started this discussion. Last reply by Dennis Heidner May 28.

Marey Tankless Water Heaters
1 Reply

What do you guys think of these…Continue

Started this discussion. Last reply by Bob Blanchette Mar 30.

Electrical Efficiency for Gas Furnaces.
2 Replies

I've noticed my new furnace uses about the same electrical power to operate as my old furnace, even though the new furnace (44k) is 1/2 the BTU of he old one (88k). Both furnaces use 1/3HP 5amp…Continue

Started this discussion. Last reply by Bob Blanchette Mar 20.

 

Bob Blanchette's Page

Latest Activity

Bob Blanchette replied to Bob Blanchette's discussion Condenser placement effect on efficiency
"I'm with you on the small local shading as shown in the study, don't think it makes much difference. Moving the condenser from the sunny to shaded side of the building *may* be different due to the potentially cooler air entering the…"
Jul 17
Hal Skinner replied to Bob Blanchette's discussion Condenser placement effect on efficiency
"Hi Bob, I was given a report a handful of years ago by our coating distributor in Texas.   He gave me the following information. His neighbor had an ac unit with the condenser on the outside at ground level.  Two pipes ran up the…"
Jul 16
Tom Delconte replied to Bob Blanchette's discussion Condenser placement effect on efficiency
"Hello Bob, This topic has been thoroughly researched, indeed:  Condensor Shading . They conclude that any savings produced by localized HVAC condenser shading are modest, <3%, or even less. Much more important is the effect of…"
Jul 16
Bob Blanchette's discussion was featured

Condenser placement effect on efficiency

Does locating an AC condenser out of the sun (east vs. west side of house) make significant difference in real world efficiency? Does anybody have a link to a case study?See More
Jul 15
Bob Blanchette commented on Michael Dunseith's photo
Thumbnail

WT*

"+1 if flue gasses are too cool it will simply rot the pipe out. That's a big reason that double wall pipe (b vent) is used even when it's not required by code for low clearance."
Jul 14
Bob Blanchette posted a discussion

Condenser placement effect on efficiency

Does locating an AC condenser out of the sun (east vs. west side of house) make significant difference in real world efficiency? Does anybody have a link to a case study?See More
Jul 13
Bob Blanchette replied to Jon LaMonte's discussion Are Zoned Heating/Cooling Systems a Good or Bad Idea? in the group HVAC
"But it's so much easier to size by the 500sqft per ton rule that's been used for decades. Seriously, how many houses have you seen that DIDNT use the 500sft per rule for sizing? Most will be 400-600sqft per ton. Newer homes just allow more…"
Jul 4
Bob Blanchette commented on Christopher Morin's blog post Top 5 A/C Code Requirements not Enforced
"Man J is too easy to fudge by changing input values. Is it a coincidence that most come out to about 500sqft per ton regardless of location and age of home?"
Jun 16
Bob Blanchette replied to Dan Wise's discussion Convert BTU/hr in a Manual J to actual fuel usages
"The issues is you size for PEAK, not AVERAGE conditions. This will vary by location, some areas have more constant weather than others. I have NEVER seen a heating system that was too small to do the job, I have seen MANY that are 3X the required…"
Jun 14
Bob Blanchette replied to Tom Delconte's discussion What would be your preference?
"Depends on the age of the system. The older the system, the less I'd put into it."
Jun 7
Dennis Heidner replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"That is probably what I was seeing also.  I  spent time in mid seventies, late 80's quick trip, then 2000, and later 2010, 2012.   The pensioners  (B&B) places still seem to use more point of use.  In 2012, I saw a…"
May 28
Steven Leighton replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"Hi Dennis, I last worked in Germany in about 1989 and lots of old houses still had them and they served.. but most new houses (1980's) that I saw and stayed in had high efficiency central gas boliers for house heat and hot water. The boilers…"
May 28
Dennis Heidner replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"Steven, last time I was in Germany,  nearly every residential house (older than 10 years) was still using tankless.  Newer houses were moving over to solar hot water.  In the 70's many of the small pension houses had little water…"
May 28
Steven Leighton replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"tankless water heaters are a pretty old idea. They originated in Europe as a way to heat water at the point of use. They were mounted in the kitchen near the sink and the water supply was taken off the one cold water supply line, that at that time…"
May 28
Bob Blanchette replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"FWIW the water heater is in a garage closet. The WH's fresh air supply is fed from the unconditioned air in the attic. A tankless heater could go back in the original location or brought indoors. Bringing indoors would offer a 15' shorter…"
May 28
Dennis Heidner replied to Bob Blanchette's discussion Tankless Water Heaters... has their time finally come?
"Yes, I do... re-read my comments in the whole blog.  It was pro's and con's, plus the need to consider some of the little things that often get over looked.  I also recognize that a solution that works well in one region can be a…"
May 27

Profile Information

Company
Corix Utilities
Professional Interests
Smartgrid systems, HVAC.
Website URL
http://www.ogepet.com/programs/smarthours.aspx
Facebook Page
http://www.facebook.com/bob.blanchette.94

Bob Blanchette's Blog

Replaced my A/C this weekend, results of downsizing by 1/3.

Recently my 13 yr old Carrier A/C devolved a leak and I chose to replace the system rather than track down the leak and repair the coil. I had been reading about doing manual J calculations and how contractors are scared to death to undersize. I had been talking to co-workers about this and it's an uphill battle getting them to think different than 1 ton per 500sq ft. So I decided to take confidence in correct sizing and "put my money where my mouth is" and install a 2 ton sized…

Continue

Posted on September 2, 2012 at 4:39pm — 2 Comments

Just Signed up for OG&E Smarthours Program, A new way to manage energy use

How SmartHours Plus works: It costs more for electricity during peak periods of high customer demand.

Other factors, like weather conditions and the time of year, also drive electrical prices higher. SmartHours Plus,

sometimes known as Variable Peak Pricing (VPP), allows you to save when costs are lower, or off peak. Peak hours

are 2 to 7 p.m. weekdays, and prices during those hours vary based on demand (see chart). You’ll get advance

notice of tomorrow’s peak price the…

Continue

Posted on January 17, 2012 at 1:30pm

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At 1:46pm on January 17, 2012, Diane Chojnowski said…

Hi Bob,

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

Thanks!
Diane, HEP Moderator

At 7:55am on January 14, 2012, Diane Chojnowski said…

Hi Bob,

 

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

Don't forget to add your location on our Member Map. We'd be happy to see Sweden represented!


Thanks!
Diane, HEP Moderator

 
 
 

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I just searched this forum for "Whole House Fan", but I didn't find much about them (except …See More
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