Have HVAC Questions? Ask an HVAC Expert for Answers
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your
issue. First I’ll need some more info so I have a more complete picture of you situation.
Is the hot water coil in the tank or in the boiler?
I'm not allowed to discuss payment issue with customers. If you have a payment question the you need to contact customer service. But generally speaking if you're referring to a charge for a phone call then yes there is an additional charge of the call. We can also continue here. The link you gave doesn't tell me what your system config is. I need to know where the heat exchanger/coil is for the DHW before I can answer your question. Generally the big box stores don't stock holding tanks or indirect fired water heaters (coil in the tank). If this is just a simple holding tank then you can use an electric water heater and not hook up the electric elements. It's actually cheaper than a specifically designed holding tank.
If you can't answer my question then a few pictures of your system would help. You can post pics here by clicking on ADD FILES next to the SEND button
Yourbest bet, since you're not living there is to get several bids from local plumbers. I suspect your system has a flat plate heat exchanger in which case the tank would be a simple storage tank. So, like I mentioned before, you can use an electric water heater for this purpose we just don't wire the heating elements. We use the water heater thermostat to control the pump or pump relay. This is a bit unorthodox but is the least expensive option and works the same as a storage tank. Since it's not typical it may be too outside the box for a big box store to comprehend but you could include them in your list of bidders.
This thread won't go away. Come back when you hav the pics. I'm usually online ~9 am to 7 pm EST daily. I do take breaks. I'll respond as soon as I can