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  1. I didn't ask for that option because of bad water...

    I didn't ask for that option because of bad water quality (pH 5). I replace $300 water heaters at least once every 3 to 4 years, heating elements about twice as often. And these are supposedly all...
  2. yes, i imagine it will with one thermostat. ...

    yes, i imagine it will with one thermostat. jeez, so I either make the first floor really cold just so the second floor can be comfy, or stick with the 2nd floor window shakers, or go to expensive...
  3. I hesitated to go with this guy because he is...

    I hesitated to go with this guy because he is affiliated with oil and because he sounds like he is trying to talk me OUT of geo unless I use oil for backup heat. That doesn't eliminate all of my...
  4. I thought that is why the AFUE figure of 82...

    I thought that is why the AFUE figure of 82 percent is applied to the calculation, or is that not redundant?

    Also note I used a 2 year average and got 790 gals./yr and 5200 deg. days.

    790 gal....
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  6. Somehow I don't believe that is done by very many...

    Somehow I don't believe that is done by very many of the HVAC contractors doing geo retrofits. In fact, I didn't see that in ANY of the 3 contractor bids, even though geothermal has different...
  7. I recall you quoted 0.1" static pressure and 400...

    I recall you quoted 0.1" static pressure and 400 to 950 CFM per ton. That means minimum of 1600 CFM. What happens if you don't get that -- what if it is around 1300 CFM? The reason I am saying...
  8. Yea, but he doesn't know my annual heat loss. ...

    Yea, but he doesn't know my annual heat loss. The oil bills prove it.
  9. Tore down the basement ceiling last week so all...

    Tore down the basement ceiling last week so all ductwork could be more thoroughly assessed. I insisted on going with more ductwork. There will be a second basement supply trunk and at a minimum 2...
  10. Changing blower speed on Geothermal - will it affect room temps?

    In the final stages about to sign a geothermal contract.

    The one last issue is how much additional ductwork and if it will make the home more comfortable.

    With a 2 stage geothermal, there will...
  11. I googled the heck out of that brandname and...

    I googled the heck out of that brandname and cannot find "Endflex" duct anywhere on the internet ordering supply companies.

    I did find a link to Novaflex 3 layer HVAC duct that is inner and...
  12. I'm happier without the cats. Cats cause their...

    I'm happier without the cats. Cats cause their own special type of household damage, speaking from much experience.

    Does any duct company make a rodent-proof flexible metal outer duct covering -...
  13. Tight Duct Retrofit -- will the MICE eat Flexiduct?

    In switching to geothermal from oil-forced air, I'll be adding an extra supply duct to each of 2 upstairs bedrooms (which are very large with dormers).

    But I know we have MICE for the last 20...
  14. I understand scrolls are used in all 3 systems...

    I understand scrolls are used in all 3 systems that were proposed by 3 contractors, and they are very efficient at compression and will have less wear-and-tear than other types of compressors. But...
  15. I am not sure how to interpret the detailed loop...

    I am not sure how to interpret the detailed loop temp specs in the installation brochures, but the data is there. So I'll pass that along to the contractor doing the proposal.

    Meanwhile, I...
  16. Thanks, that makes sense. 12.5 x 24 = 300 hours,...

    Thanks, that makes sense. 12.5 x 24 = 300 hours, so it looks like I do need the compressor to deliver 38,000 BTUH or I could go above 300 hours on backup per year.

    So a 3 ton or 28,000 to 30,000...
  17. Since it is not efficient to design a geothermal...

    Since it is not efficient to design a geothermal or a heat pump to try to meet 100% of cold days without ANY auxilliary heat, then can I use the SAME calculation to try to estimate what my BTUH...
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    I'm looking at the LACK of ability to compare...

    I'm looking at the LACK of ability to compare bids as a homeowner from the other side of the fence.

    Because I have a scientific and math background, I always want numbers to back up a proposal...
  19. Based on where I live, last year was 5023 dd, so:...

    Based on where I live, last year was 5023 dd, so: 666*138000*0.82/5023 = 15000 BTUH per degree day, and design temp. was 0 degrees outside, 72 inside, so 15000/24*70 = 43750 BTU/hr at 0degF outside...
  20. My question to you is, what exactly makes the...

    My question to you is, what exactly makes the first floor "easy to cool" for a cape compared to another type of house? Purely the square footage and the fact there is a finished second floor above...
  21. Since this home was never built for central air,...

    Since this home was never built for central air, it's not likely I'll easily pump enough cold air upstairs. A few years ago I did my own detailed room-specific heat gain calculation taking into...
  22. See first post: Small-medium cape with 26x16...

    See first post: Small-medium cape with 26x16 addition, open air to dining room and kitchen. 1800 sq. ft. first floor plus second floor, 1200 basement.
  23. Well, the problem is the contractor who...

    Well, the problem is the contractor who recommends 4 ton did not actually measure and count my ducts and duct square areas. In addition he said that years ago he used to recommend all the ducting...
  24. The other question I have is how do I go about...

    The other question I have is how do I go about figuring if limited modifications are needed, how to determine what modifications are cost effective?

    Regarding ductwork mods, should I ask the...
  25. Geothermal heat comfort in a 50 year old home with limited insulation and ductwork?

    I'm trying to decide whether to invest in geothermal or not, and the issue I think is comfort not price. I have done research, got 3 bids on closed loop (all similar priced, but won't quote numbers...
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