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Dana
DIY Senior Member

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Join Date: 01-14-2009

Last Activity: Yesterday 01:50 PM

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Yesterday, 12:22 PM

Dana replied to a thread Finishing Basement - Insulating Walls and Floors in Remodel Forum & Blog

My 1920s vintage poured basement was surprisingly flat & plumb, which allowed me to use 3" reclaimed roofing iso and 1x furring TapConned to the...

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10 replies | 163 view(s)
Yesterday, 12:11 PM

Dana replied to a thread Oil prices are choking us to death. Convert to gas? in Boiler Forum

Cheaper than an indirect would be drainwater heat recovery heat exchanger, which would give you continous showering capability (no recovery time...

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12 replies | 479 view(s)
Yesterday, 11:41 AM

Dana replied to a thread Finishing Basement - Insulating Walls and Floors in Remodel Forum & Blog

XPS is R5/inch when new, R4.2/inch when fully outgassed (in 50 years or so.) You CAN'T for get the thermal break, especially if you go with 2"...

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10 replies | 163 view(s)
Yesterday, 11:28 AM

Dana replied to a thread Finishing Basement - Insulating Walls and Floors in Remodel Forum & Blog

First if you put the studs against the concrete you'll have a HUGE thermal bridge undercutting the performance of the foam, and provide a wicking...

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10 replies | 163 view(s)
05-14-2013, 12:01 PM

Dana replied to a thread Building a new master shower with antique-looking exposed copper plumbing in Shower & bathtub Forum & Blog

Since the cold water flow volume will be so much lower than the hot water volume, adding the second line for the cold side wasn't really necessary,...

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4 replies | 80 view(s)
05-14-2013, 11:37 AM

Dana replied to a thread Need Advice Switching to Gas in Boiler Forum

The issue may come down to "... if sized, installed and maintained properly", which may be hard to do, since the smallest Lynx has a min-fire of...

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3 replies | 168 view(s)
05-14-2013, 08:22 AM

Dana replied to a thread Reliable heat pump water heater? in Water Heater Forum, Tanks

You tend to get higher efficiency out of separate mini-splits than a 2-head multi, as long as they are reasonably well matched to their peak loads,...

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5 replies | 389 view(s)
05-13-2013, 01:54 PM

Dana replied to a thread Convert steam radiators from oil to gas in HVAC Heating & Cooling

Any quotes I've seen to date in my area for changing from steam to condensing HW using the same radiation have been way beyond any reasonable ROI...

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5 replies | 200 view(s)
05-13-2013, 09:47 AM

Dana replied to a thread Reliable heat pump water heater? in Water Heater Forum, Tanks

The ROI on heat pump water heaters in an SC climate goes beyond mere hot water heating, since for half the year (or more) it's doing double-duty as...

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5 replies | 389 view(s)
05-10-2013, 09:25 AM

Dana replied to a thread Flow rates in PEX / Air Elimination / Heat Transfer in Boiler Forum

"What if set point was 140 and I mixed down?" Do the math- it's 7th grade algebra. You'll get some tub-fill capacity boost, but to get very...

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10 replies | 297 view(s)
05-10-2013, 08:21 AM

Dana replied to a thread Oil prices are choking us to death. Convert to gas? in Boiler Forum

Thanks for the reference on the Taco SR-501OR Fuel Mizer! Specs-wise it looks like a better mousetrap than some of the other retrofit ODR controls.

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12 replies | 479 view(s)
05-10-2013, 08:08 AM

Dana replied to a thread Convert steam radiators from oil to gas in HVAC Heating & Cooling

Most insurance carriers won't void anything as long as the local inspectors signed off on the retrofit conversion burner installation. If the boiler...

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5 replies | 200 view(s)
05-09-2013, 11:23 AM

Dana replied to a thread Flow rates in PEX / Air Elimination / Heat Transfer in Boiler Forum

...which is why the indirect needs to be sized for the biggest tub you have to fill, but beyond that it doesn't much matter. Even if run to...

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10 replies | 297 view(s)
05-08-2013, 10:37 AM

Dana replied to a thread Flow rates in PEX / Air Elimination / Heat Transfer in Boiler Forum

Drainwater heat recovery units are a bit hard to find in the US- they can be ordered (at full retail) through Home Depot, and most of the vendors...

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10 replies | 297 view(s)
05-08-2013, 08:38 AM

Dana replied to a thread Convert steam radiators from oil to gas in HVAC Heating & Cooling

For the heat distribution via steam radiators you need a steam boiler (which is not technically a furnace.) The high boiler temperatures required...

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5 replies | 200 view(s)
05-06-2013, 11:47 AM

Dana replied to a thread Seeking hot water replacement advice in Water Heater Forum, Tanks

If I misconstrued your initial posts as astroturfing, I apologize. And while it has seemed to me you were both advocating a bit too hard as well as...

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14 replies | 1773 view(s)
05-06-2013, 08:00 AM

Dana replied to a thread Basement vent -- off topic perhaps in HVAC Heating & Cooling

The high mass floors are definitely evening out the diurnal temperature swings and moderating the solar gains to good benefit. When you insulate the...

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7 replies | 586 view(s)
05-06-2013, 07:42 AM

Dana replied to a thread Oil prices are choking us to death. Convert to gas? in Boiler Forum

Consider this another vote for installing a conversion burner w/ indirect hot water heater and smarter heat-purging controls. Odds are pretty good...

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12 replies | 479 view(s)
05-03-2013, 02:21 PM

Dana replied to a thread Need advice for installing three body sprays in Plumbing Forum Discussion & Blog

If you buy through EFI (link found on my first post) you can get a decent ~53% efficiency 4" x 48" for about $600, (delivered), which is far cheaper...

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13 replies | 423 view(s)
05-03-2013, 12:33 PM

Dana replied to a thread Need advice for installing three body sprays in Plumbing Forum Discussion & Blog

You need to add up both the length of the pipe, and the equivalent lengths of the fittings the water flows through, and apply that to the pressure...

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13 replies | 423 view(s)
05-02-2013, 02:39 PM

Dana replied to a thread BTU Help in Water Heater Forum, Tanks

Some commercial washing operations have also been able to reap a real performance boosts from drainwater heat recovery heat exchangers, provided that...

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3 replies | 143 view(s)
05-02-2013, 11:14 AM

Dana replied to a thread Basement vent -- off topic perhaps in HVAC Heating & Cooling

A dehumidifier converts a latent cooling load (moisture) to a sensible cooling load (air temperature), plus adds the heat o the energy used to turn...

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7 replies | 586 view(s)
05-02-2013, 10:40 AM

Dana replied to a thread Need advice for installing three body sprays in Plumbing Forum Discussion & Blog

We're talking only 4 heads here, and a fairly hefty 68psi (static), so it just MIGHT cut it with 1/2" if it's a relatively short run, since you're...

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13 replies | 423 view(s)
05-01-2013, 12:18 PM

Dana replied to a thread Need advice for installing three body sprays in Plumbing Forum Discussion & Blog

Yes, adding more sprays depletes the tank faster. At 68psi you'd still be getting "pretty good" gallons per minute (gpm) through half-inch, but...

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13 replies | 423 view(s)
04-30-2013, 02:26 PM

Dana replied to a thread Basement vent -- off topic perhaps in HVAC Heating & Cooling

"Sub-slab depressurization" vents designed for radon remediation will dry out basements when groundwater is the primary moisture source, but...

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7 replies | 586 view(s)
04-29-2013, 09:06 AM

Dana replied to a thread boiler question about domestic water use in Plumbing Forum Discussion & Blog

Older boiler with embedded hot water coils are typically operated high & low limit aquastat controlling the burner, as well as a high-temp safety...

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1 replies | 112 view(s)
04-29-2013, 07:49 AM

Dana replied to a thread Hardwood slab on grade in Remodel Forum & Blog

Under a slab iso at any density is a disaster due to the moisture accumulation loss of performance. Above the slab 15psi goods under some types...

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10 replies | 516 view(s)

More Activity

2 Visitor Messages

Offsite - 10-04-2011 10:40 AM View Conversation

OK, when you start talking about 3rd order effects of parameters, that really make me want to ask about my system and actually pay you for your advice!! Thank you for being here for the community, Dana!

-rb-
ourzoo - 05-25-2010 07:41 PM View Conversation

Dana - if you don't mind me asking, what do you do for a living? You must have a Materials Science, or Mechanical Engineering background. I really appreciated hearing the details behind your explanations for my bathroom water vapor post. It always amazes me how much folks take for granted in a house/building design. Many right decisions must be made for the "system" to work. I'd appreciate any reading material you can recommend on the subject. I'm comfortable with Engineering math. Thanks again for your help and best wishes! Tom/ourzoo

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Last Activity: Yesterday 01:50 PM

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Dana DIY Senior Member

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2 Visitor Messages

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About Dana

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Dana
DIY Senior Member