Bob Blanchette's Discussions (525)

Discussions Replied To (26) Replies Latest Activity

"Why use insulated flex if the return duct is in conditioned space? You could have us…"

Bob Blanchette replied Dec 14, 2014 to Floor level return added to attic ductwork.

1 Dec 14, 2014
Reply by Bob Blanchette

"+1 on the typical GROSS oversizing of furnaces. A "2 burner" (typically 50k or small…"

Bob Blanchette replied Nov 6, 2014 to Furnace with ECM: How to Model

5 Nov 13, 2014
Reply by Ryan Schmidt

"There's more to it than that. The blower efficiency gain comes using an ECM for low…"

Bob Blanchette replied Nov 4, 2014 to Furnace with ECM: How to Model

5 Nov 13, 2014
Reply by Ryan Schmidt

"Amen. Limiting size per sqft would be more effective IMHO. It would have to be insta…"

Bob Blanchette replied Aug 15, 2014 to ENERGY STAR Furnaces & Failure of DOE Standard

7 Aug 15, 2014
Reply by Bob Blanchette

"Motor efficiency could be improved 25% by using a single speed PSC motor instead of…"

Bob Blanchette replied Aug 12, 2014 to ENERGY STAR Furnaces & Failure of DOE Standard

7 Aug 15, 2014
Reply by Bob Blanchette

"But it's so much easier to size by the 500sqft per ton rule that's been used for dec…"

Bob Blanchette replied Jul 4, 2014 to Are Zoned Heating/Cooling Systems a Good or Bad Idea?

24 Jul 5, 2014
Reply by John Proctor

"This is exactly why oversizing continues, nobody is willing to stick their neck out.…"

Bob Blanchette replied May 5, 2014 to How to Read Load Calculation Reports

37 May 5, 2014
Reply by Bob Blanchette

"90% of residential installs are done by the WAG or rule of thumb methods. 500sqft pe…"

Bob Blanchette replied May 3, 2014 to How to Read Load Calculation Reports

37 May 5, 2014
Reply by Bob Blanchette

"60k is INPUT of your furnace right? If it's a typical 80% that would give you a 48k…"

Bob Blanchette replied May 3, 2014 to How to Read Load Calculation Reports

37 May 5, 2014
Reply by Bob Blanchette

"He's not going to want to "break the norm" of the 50btu per sqft he's been installin…"

Bob Blanchette replied Apr 27, 2014 to How to Read Load Calculation Reports

37 May 5, 2014
Reply by Bob Blanchette

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Discussion Forum

HVAC integration – the past, the present, and the future

Started by Igor Mitbarg. Last reply by Lucifer Prescott Apr 11. 1 Reply

Target superheat formula

Started by Miguel Orduno. Last reply by John Proctor Feb 18, 2015. 6 Replies

Now for Something Different

Started by John Porterfield. Last reply by John Porterfield Jan 12, 2015. 2 Replies

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