Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2007
    Posts
    71

    Question Is Rheem Fully Modulated??

    I've decided on our new Furnace and AC and have what I think is an excellent service company to install it. I was understanding the Rheem is "fully modulated", running from 30% to 100% in 5% increments. However, reading some of the brochures, how the furnace modulates may depend on the type of thermostat you have? Thus, the system may only function as a two or perhaps three stage unit? I don't have a model number. The quote only ID's a 100k btu Modulated Furnace. The brochure shows a "Classic 90 Plus Modulating Gas Furnace". Do I need to further clarify with the dealer what system I'm getting, or are all Rheem Modulating furnaces "FULLY" modulated when using a proper thermostat? Is there a particular thermostat I need to be sure I get? Thanks for your thoughts!!

  2. #2
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,374
    You need Rheem's mod thermostat for the furnace to truly modulate. With a standard thermostat the furnace operates in stages.
    Climate Control Solutions for your Home or Office

    Serving Northeast Philadelphia and Surrounding Areas

  3. #3
    Join Date
    Nov 2007
    Posts
    71
    Thanks. The quote shows a "Rheem Modulating Thermostat". I understand it is some kind of touch screen unit. Does that sound like what I want?

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,884
    With the Mod stat, the gas valve steps in 5% increments from 40% to 100% of capacity. The variable speed blower varies to maintain around 65 temp rise in all firing rates. This is the blue touchscreen stat. With a conventional stat, it stages at 40%, 65% and 100% based on time (and temp with a 2 stage stat) .

  5. #5
    Join Date
    Nov 2007
    Posts
    71
    Thanks!!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event