Walter Ahlgrim
  • Male
  • Saint Louis, MO
  • United States
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Latest Activity

Walter Ahlgrim replied to Paul Raymer's discussion Capillary break retrofit
"I think you are confusing terminology. Capillary break retrofit is a impossibility. A sheet of plastic under a slab of concrete = vapor barrier   A water proof barrier between the footing and the foundation walls= Capillary…"
Jan 23
Walter Ahlgrim commented on Building Performance Journal's blog post HVAC Industry Trends: 7 Things Every Contractor Should Know
"Will you please define your terms? Or provide a link for each. Smart HVAC Someone connects a Nest thermostat to their 60 year old steam boiler and suddenly that have a smart system?   DeVAP HVAC Google found an interesting research paper. Is…"
Dec 23, 2019
Walter Ahlgrim commented on Kristina Frunze's blog post HCFC Refrigerant Ban: Everything Contractors Need to Know
"Just to be clear are the popular 134A and 410A products covered under this ban?   Walt"
Dec 17, 2019
Walter Ahlgrim replied to Julie Saporito's discussion Heat pump failure during high heat days?
"  I am not sure how to take your questions and answers Franco. Today’s heat pumps are not what they were in the 1970s anymore! I agree back in the day 20° was a struggle. Today’s systems have variable speed compressors,…"
Nov 5, 2019
Walter Ahlgrim replied to Julie Saporito's discussion Heat pump failure during high heat days?
"Eric and David you may find this laboratory study of real world dirty AC coils brought in to the lab and studied how they worked. They tested the dirty air conditioners, then washed them thoroughly with a garden hose and tested again. They also used…"
Oct 14, 2019
Walter Ahlgrim replied to Julie Saporito's discussion Heat pump failure during high heat days?
"“The magnitude of the outside-inside delta-T has no bearing on the amount of work done by a heat pump over a given period of time. “ I disagree the inside outside delta is directly proportional to the number of BTUs required to maintain…"
Oct 2, 2019
Walter Ahlgrim replied to Julie Saporito's discussion Heat pump failure during high heat days?
"Please share this “news of failure rates tied to high heat days” Where did you get this “news” from is this data anecdotal or statistically? The cold climate heat pumps IE hyper heat models are almost two stages systems with…"
Oct 1, 2019
Walter Ahlgrim commented on David Byrnes's blog post Why Phoenix Is Called "The Land Of No Return"
"I do not understand your sizing chart you say “22” return on a 5 ton AC unit” is that a 22x22 square or 22” round or any shape with 22 square inches. I do like the…"
Jul 22, 2019
Walter Ahlgrim commented on David Byrnes's blog post Why Phoenix Is Called "The Land Of No Return"
"I do not understand your sizing chart you say “22” return on a 5 ton AC unit” is that a 22x22 square or 22” round or any shape with 22 square inches. I do like the…"
Jul 22, 2019
Walter Ahlgrim replied to Luis Hernandez's discussion Water heater ventilation question
"That black spot looks to me like someone was sloppy with their torch while working on the copper pipes and burned the PVC. The first pipe does look like CPVC I do not recall seeing CPVC listed as approved vent in any instructions. The way PVC cement…"
May 7, 2019
Walter Ahlgrim replied to Luis Hernandez's discussion Water heater ventilation question
"Read the instruction manual closely. You should find limits for the size, length and number of bends allowed. You may want to look inside the pipes, small animal have been known to crawl in and die.   Walta"
Apr 22, 2019

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At 4:26pm on June 29, 2014, Diane Chojnowski said…

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!

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Forum

Looking to buy used equipment

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Oily Stuff in ERVs

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building envelope air tightness studies

Started by Greg O'Beirne in General Forum. Last reply by Greg O'Beirne on Wednesday. 19 Replies

Watts Up? Pro - Software Download

Started by Todd Abercrombie in General Forum. Last reply by Sean Wiens on Wednesday. 3 Replies

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Van Moon replied to Heidi McCullough's discussion Looking to buy used equipment
"I have all of that, except no wifi adapter.  They are discontinued.   I have a DB…"
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Kristina Frunze commented on Kristina Frunze's blog post A Contractor’s Guide to Compensating for Oversized Air Conditioners
"@Kent Browning You are correct, I meant to say dehumidifier. Thank you for correcting that."
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Kristina Frunze's blog post was featured

A Contractor’s Guide to Compensating for Oversized Air Conditioners

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Sales Executive: HVAC Network (Remote)

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Kent Browning commented on Kristina Frunze's blog post A Contractor’s Guide to Compensating for Oversized Air Conditioners
"" Installing a Humidifier A humidifier is another option worth considering. To overcome the…"
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