To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

Hydronics frustration cold air no hot water

ShawnLayneShawnLayne Posts: 4Member
I have a 10 year old home with 2 furnaces and 2 60g gas water heaters. When I turn one of the 2 furnaces on, I lose hot water at all taps within a couple minutes. Also, the furnace struggles to keep the house up to temp. It mostly blows cool air. Both water heaters are tied together in a series. I've been told they are in a "closed system". I've had plumbers and HVAC guys out multiple times and nobody can fix it. It seems to me that something has to be wrong with the one furnace/air handler because not only does it blow cold air, but it prevents the faucets from getting hot water. The instant I shut this unit off, I have an endless amount of hot water. Just seems like a simple valve not opening/closing to me. I'm to the point I just want to buy an entire new system because nobody can give me a straight answer.
· ·

Comments

  • nicholas bonham-carternicholas bonham-carter Posts: 5,415Member ✭✭✭
    Terminology

    Do we understand that you have forced air furnaces, which may be robbing gas pressure somehow when they run, preventing the gas hot water heaters from making hot water?

    Or do you have hot water heaters which supply hot water to fan-coils in an air handler setup, with added controls to produce domestic hot water, through a heat exchanger?

    This sounds inefficient at the best when working, costing more for gas than a regular boiler with indirect, and output to the coils. Were the bills high?--NBC
    · ·
  • Harvey RamerHarvey Ramer Posts: 835Member ✭✭✭
    Well

    Make and model # of all equipment. Airhandler, heatpump/AC, gas water heater?



    If it is a natural draft conventional gas water heater. It's just not going to work. Sorry.



    Harvey
    · ·
  • icesailoricesailor Posts: 6,848Member ✭✭✭
    Information

    Post photos of the whole thing. Water heaters, air handlers "furnaces", whatever is there.
    · ·
  • heatpro02920heatpro02920 Posts: 989Member
    Like the others said

    we need to know what type of system it is? Did it work for 10 years or has this been an issue the entire 10 years?



    If it is a pair of hydro airs running off of a pair of medium/large water heaters, it is most likely something odd that should be redone properly.. Sounds like this is the case because why would you need dual direct fired 60's?



    If it is a more conventional system where you have 2 individual gas fired furnaces and 2 dhw water heaters, then it is a gas problem... BUT since you said it happens instantly when you turn the system off I am thinking it is an odd water heater fired heating system, where they have bronze or ss circs and run high pressure to the air handlers and take the dhw off of the same system... This is not a good idea for a lot of reasons...



    If that is the case, your best option would be to get a boiler installed, preform a heat loss, check the btu rating of each air handler, and have a boiler installed to match with 2 zones, and let one of them 60s handle your DHW needs...
    · ·
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!