02:58AM | 08/23/03
Member Since: 08/22/03
4 lifetime posts
I moved into a 5 year old home with the original water heater installed. It is a "State" 73 gallon unit rated at 40,000 BTUH. I want to connect a GE 40 gallon unit to it rated at 34,000 BTUH. How should I go about this, which one should drain first and which should be the "backup", and what size vent pipe do I need for the gases?


06:46AM | 08/24/03
Member Since: 08/22/03
4 lifetime posts
thanks for the reply. Ok so assuming i can find the manuals for each, how then do i come up with the size of the pipe? do i need to hire a professional to do this? I have been told my an HVAC professional that i need to replace my current 5 inch pipe with a 6 inch pipe. I'm not sure how he came up with that but he says it was to code that way.


03:43PM | 08/24/03
Member Since: 03/01/03
22 lifetime posts
There must be something I'm missing... If they were piped in parallel, when the smaller runs out of water, cool water would mix with the warm water from the larger heater. This would drop the overall hot water temp after the small heater ran out of water. If they were in series, wouldn't you get the total of the two tanks before you started losing temperature? That's what it would seem like to me.


05:17PM | 08/24/03
Member Since: 08/22/03
4 lifetime posts
I was wondering the same thing. The solution that was proposed to me at one point by a friend (a non-professional) was to have the more efficient unit feed into the less efficient unit. Set the two temps to be the same. The less efficient unit would be the first tank to service hot water requests and when it's thermostat kicked on, the fill from the more efficient unit would already be hot, turning the less efficient unit's thermostat off quicker, then the more efficient unit's thermostat would kick on and would cause the water to fill back up in its tank and heat up to the same temp as the less efficient unit. This theory sounded good to me but he did stress that I needed to check out the BTU's with a local professional first to make sure that would work. What do you all make of that?


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Reused steel windows create an eye-catching splashguard in this walk-in shower. The vintage factory windows bring an inter... A galvanized steel tub is a surprising but charming fixture in this bright and breezy screened patio. It's perfect for was... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... If you lack plumbing skills but have a good sturdy tree, here's the easiest outdoor shower solution of all: Simply attach... Need a window and a door in a tight space? A Dutch door with a window may be your answer. These useful doors are split hor... How do you like this smart use for an old bottle? Clamp an empty wine bottle to a fence or wall near your outdoor deck or ... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... Repurpose birthday hats to create a string of lanterns for your porch, patio, or garden. Cut the tip of the cone, punch h... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon