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  1. VisionPRO IAQ w/ Y8150/W8150 Fresh Air System

    I have a new 2-story house in Florida. It has two Bryant single-stage heat pump systems (one per floor) with each system having a Honeywell Y8150/W8150 fresh air ventilation system and basic...
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    As a rule of thumb, from an operating and comfort...

    As a rule of thumb, from an operating and comfort standpoint, it is always better to have more smaller systems. Initial installation will be more expensive, however you get the reliability of two...
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    Appears to be a very thorough bid! Two things I...

    Appears to be a very thorough bid! Two things I would inquire about: using a heat pump instead of a straight cool unit. This will give you a "dual-fuel" unit. And unless you specifically didn't want...
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    How much heat do I need to accommodate for in the...

    How much heat do I need to accommodate for in the load calcs from these ventilating dehumidifiers?
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    3,411

    What is the fresh air ventilation capacity of the...

    What is the fresh air ventilation capacity of the Ultra-Aire XT150H? How many cfm's?
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    3,411

    I think I am going to take your advice and...

    I think I am going to take your advice and seriously look at a whole house ventilating dehumidifier. For 3700 sq. feet, should I look at using one Ultra-Aire XT150H for the whole house or should I...
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    House will be 3700 sq. feet, two story. Total of...

    House will be 3700 sq. feet, two story. Total of 3 baths (one downstairs, two up). Was going to install ERV on upstairs system. I was originally thinking about using a 200 cfm ERV so I could...
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    Using Ebay as a guide, a whole house dehumifier...

    Using Ebay as a guide, a whole house dehumifier appears to roughly 2x the cost to of an ERV. You then still have to install bath fans.
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    I was actually planning on using a 200 cfm ERV...

    I was actually planning on using a 200 cfm ERV with 100 cfm each from two bathroom. Florida Mech. Code requires a minimum of 50 cfm of exhaust per toilet and shower.
    I like the idea of using a...
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    Nice looking install. Good looking metal work...

    Nice looking install. Good looking metal work too! How does the Lennox Icomfort stat compare to the Carrier Infinity stat?
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    This is exactly what I want. Is this level of...

    This is exactly what I want. Is this level of control available with the Carrier ERV's? I am planning on having a Carrier Infinity air handler with the Inifnity controls.
  12. Forgot to mention that I am planning on having...

    Forgot to mention that I am planning on having (budget permitting) a 200cfm ERV for the 2nd floor with the exhaust from the bathrooms.

    I originally wanted a 2-stage system for the 1st floor but...
  13. I've been over and over the inputs for the 2nd...

    I've been over and over the inputs for the 2nd floor and the Bonus room and every things seems correct. And though the 2nd floor is almost twice the sq. footage, both areas have the same number of...
  14. New Construction A/C size recommendation

    I downloaded HVAC Calc and ran the loads on my new house which is currently under design. It is a two story Craftsman style house in Tampa. Concrete block construction on first floor, 2x6 wood frame...
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    Why are the proposed Trane systems 3 tons each...

    Why are the proposed Trane systems 3 tons each while the Carriers are 2 tons each? would be interesting to see each of the contractor's Manual J calculations to compare.
  16. I'm in Florida too and we had one helluva hot...

    I'm in Florida too and we had one helluva hot summer. My electric bills were higher than they have ever been. That being said, what was the SEER on your old system? I'm guessing it was either 10 or...
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    Working with my house designer, she recommended...

    Working with my house designer, she recommended using 20" deep floor joists to give us plenty of room to route ductwork. Does anybody know how large of a duct will fit through the webs on a 20" deep...
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    Best way to control ERV

    In the planning stages of designing a new home in Florida. Will be using heat pumps with VS air handlers (possibly Carrier Infinity system). Would like to install an ERV for fresh air. I am a...
  19. You will definitely want to "oversize" compared...

    You will definitely want to "oversize" compared to a ducted return air system to keep your pressure drops down. The easiest solution, if you have a grid type lay-in ceiling system, is to just use...
  20. Thanks for the update. I just checked Carrier's...

    Thanks for the update. I just checked Carrier's website and it appears you are correct. The programmable version of the Edge thermostat does control humidity by using the variable speed fan in the...
  21. If you go with the Performance system, use the...

    If you go with the Performance system, use the Carrier "Thermidistat" in lieu of the "Edge" thermostat. The Thermidistat will work with the variable speed air handler to control humidity. I have a...
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    Thanks for the good ideas on designing the floor...

    Thanks for the good ideas on designing the floor trusses with leave-outs for ductwork.

    I believe the Florida mechanical code already requires a "balanced return air" which means return air drops...
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    Thanks for the feedback. I guess I could have...

    Thanks for the feedback. I guess I could have clarified a bit more. This will be a slab on grade home, no basement (Florida). The initial thought is to use spray foam attic insulation and install the...
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    Duct routing on 2-story home

    We are in the planning stages of building a new 2-story home in Florida. We will probably go with heat pumps, one system per floor. The house will most likely be concrete block construction for the...
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    Yes, that is the "magic" with a two-speed system....

    Yes, that is the "magic" with a two-speed system. Think about how you drive your car. You accelerate up to a certain speed in low gears, then maintain your speed in high gears. When you need to...
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