Search found 708 matches

by triguy128
Tue Jan 29, 2013 6:25 pm
Forum: Post-1900 Houses Forum
Topic: Converting back to Hot Water Radiant
Replies: 8
Views: 5980

Re: Converting back to Hot Water Radiant

Well, I'm at $5800 in just parts and materials including controls and zone dampers and zone controller for the forced air side. Add about $7k for air handler and heat pump with hydronic coil. I could put in a furnace and heat pump for about $7500. What do I get? 1) Radiant heat 2) More hot water cap...
by triguy128
Tue Jan 29, 2013 12:04 pm
Forum: Post-1900 Houses Forum
Topic: Converting back to Hot Water Radiant
Replies: 8
Views: 5980

Re: Converting back to Hot Water Radiant

I think I have it all designed including circuit lengths and size, pressure drops, pump sizes and models. Now to make a "shopping list" and see what the parts will cost, then talk to my plumber and get a feeling on the time/cost ot install it. I'll do all the controls and wiring myself. Really with ...
by triguy128
Fri Jan 25, 2013 11:08 am
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

Our mod-con runs great with our over-radiated system: With today's very cold temperatures (around 0°F), our water temp got up the way up to the high 130's, when the system was recovering from nighttime setback. Our most recent gas bill was $170 - just a tad higher than our previous house (less then...
by triguy128
Thu Jan 24, 2013 1:11 pm
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

So I did the math. The EDR of the radaitors in my home are pretty huge. I calculate the total EDR of the original radaitors in my home was around 1400! SO with steam, we're talking 300k BTU of capacity if the flow control were left wide open. I'm looking now at seeing what kind of mix I can have ot ...
by triguy128
Thu Jan 24, 2013 11:33 am
Forum: Post-1900 Houses Forum
Topic: Converting back to Hot Water Radiant
Replies: 8
Views: 5980

Converting back to Hot Water Radiant

So I've been doing a ton of research and am leaning towards making a move to go back to radiant heating, at least for my downstairs. I'm thinking of mixed system with the following: 1) Navien Combi boiler cascaded to existing Navien tankless water heater. We actually have found situation where we're...
by triguy128
Fri Jan 18, 2013 6:34 pm
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

It probably has more to do with central AC. Once you throw that into a mix, forced air will always be cheaper. IF you design a house right, you should need little or no heat at all. So yes, a 60k boiler should be plenty for a home under 4000sqft. I think we'd be smart as a country strategically to m...
by triguy128
Thu Jan 17, 2013 1:48 pm
Forum: General Discussions Forum
Topic: Plumbing
Replies: 19
Views: 9356

Re: Plumbing

One downsize of PEX to remember, is the ID is smaller I beleive than copper. So I would still use copper in some cases, such as comming right off a water meter, going to a water heater (especially a tankless) and anny other application where pressure drop/flow could be an issue. I'll mention it agai...
by triguy128
Thu Jan 17, 2013 1:37 pm
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

You're also comparing a small apartemnts to a large homes here. When you drop the size of the equipment and installation, boilers start to gain some advantages. Economies of scale do matter a lot too. But maybe I was a little too conservative on hte piping costs. Ultimately any way you cut it, it's ...
by triguy128
Wed Jan 16, 2013 11:44 am
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

All the piping and radiators and labor needed ot isntall them definitly cost more than ductwork. Plus, you can get a furnace for around $1500 and another $1000 to put it in. But the time you add expension tank, valves, backflow, PRV, air eliminator, etc, a boiler will set you back at least $5-6k. Ag...
by triguy128
Mon Jan 14, 2013 1:49 pm
Forum: Post-1900 Houses Forum
Topic: Old duct work in house heated by hot water boiler? Huh?
Replies: 19
Views: 12408

Re: Old duct work in house heated by hot water boiler? Huh?

Remember, forced air heating is not better, it's just a lot cheaper and integrates easily with central AC. Just how drywall si not better than plaster, it has advantages, primarily, it's a lot cheaper to install and requires a lot less skill. Hydronics are better in so, so many ways. But residential...