Hi,I've looked around online and haven't found a lot of good information on home heating with hydronic air handlers used in conjunction with tankless water heaters (TWH). I would be interested to…Continue
"When it costs the same price as 2 separate systems there is no juice regardless of how hard you squeeze.
Only a nightmare for future service techs, there will never be a part on the truck to fix the system, maybe not even at the supply house. Parts…"
"Nice posts Steven and Eric.
Scale on my combi is a recurring problem. Attaching boilers to ahu's seems to excite tinkerers, but nobody seems able to make a case there us any extra juice from all the extra squeezing.…"
"I find the tank less hot water lime up. I have a condensate pump that I pump white vinegar or such(delimeing) into the one quart heat exchange. its 1.5 hr once a yr just to keep the tankless from over heating. I do put a magnet on…"
"It looks better on paper than in real life applications. Both Amana and Lennox came out with dual heat applicationa that would heat the home and hot water. Eff ratings on the heating side were about 92-97% and the water heaters were in…"
"Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you! Don't…"
"Barbara, thanks for the info - this is some of the research I was interested in seeing.
That report shows that a combined system is more efficient than an 80 AFUE furnace and very inefficient water heater. It does not seem to indicate that a…"
"What are you hoping to save? Have you done any calculations?
How big is the house?
Just put in a high efficiency air source heat pump and an electric water heater and save yourself a meter charge. Gas will not…"
"Why not get 2 systems if it's the same price? Furnaces are mass produced keeping costs down, hydronic air handlers are still a "speciality item" in residential with low production numbers. You won't find a single hydronic air…"
"For the same price I'd keep the appliances separate. Once you go to condensing units there is little difference in fuel consumption. Condensing HWT parts are special order items, condensing furnace parts are typically on the shelf at the local…"
"Thanks for the reply, Bob.
There will be no AC in the home, and the net cost for air handler and recirc pump is going to be very near the same cost (possibly slightly more) than the condensing furnace. (This is after Oregon tax…"
Hi,I've looked around online and haven't found a lot of good information on home heating with hydronic air handlers used in conjunction with tankless water heaters (TWH). I would be interested to hear from anyone who has experience with these "combined" or "integrated" space- and domestic water heating systems. I'd like to know a few things, especially as they compare to a condensing gas furnace:- How efficient are these systems? I've read that they match the efficiency of the water heater,…See More
"I've done this with a conventional water heater. Works well except for design temp mornings where there wasn't quite enough hot water for space heating and a hot shower. EF on the WH goes up since there is more heat produced vs. standby…"
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