Search:

Trying to run 4 zones off a two-stage unit is not ideal. Look at the 7 Series plus an Intellizone Zoning system. The system requires no bypass damper and will modulate compressor and airflow to match...

You need to have an unpowered buffer tank installed between the geo unit and the powered water heater to get significant benefit from the DHW output. This also stops the WH from working against the...

Here is the diagram. This is from bergy, a member here who hasn't been active for a few years. The "main tank is the powered water heater. The recirculator circuit is not shown, but the recirculator...

You need an unpowered buffer tank between the geo and the WH. Without it you will not get significant output from the geo's desuperheater.

Good advice. In addition to the Manual J/S/D that should be done for an ASHP, but often gets skipped, the GSHP needs design work to size the loop for the building load and design work to optimize the...

If possible, you should consult with a GSHP installer experienced with pond loops in your area, to specify a design that will work for your scenario. It could be difficult to find someone though.
...

I meant EWT. Standard practice is to design loops such that the minimum EWT for the season is 30 deg F. Obviously, this is for closed loop systems using antifreeze. Typical design assumption is 15%...

Good idea to post here.

The standard design conditions for GSHPs use a minimum entering water temperature of 30 deg F. So, 39 degree pond water will not be a problem for a standard GSHP.

My 4T...

I'm not able to follow your analysis, but people who specialize in GSHPs and who have measured desuperheater performance say the only way to get significant value out of a desuperheater is to pipe it...

I've asked to have it corrected when the installer comes back to correct other issues. We'll see what happens. This is on a top-of-the line fully-variable GSHP, so the price for the job was steep.

I contacted the manufacturer of the damper. They said the damper would obstruct the airflow the way it's installed and advised it should be adjusted.

The young tech who installed this damper did some other questionable things, which are in the process of being fixed. Sadly, the damper IS the same width as the duct! Both are 16".

Thanks. The duct is angled, but I believe it's still square, so I don't know why the damper was done that way.

This photo is of an 8x16 zone damper installed in an 8x16 supply duct. The damper was installed at an angle rather than square to the duct. The duct serves the second floor of the house and...

Good to hear it worked out for you.

This site is very active, but there's not much on here about GSHPs.

The forums on geoexchange.org seem are the best resource I could find for GSHP. There are...

You would use the accessory relay on the ABC control board within the Envision unit to control the bulb. There are dip switch settings to cycle the relay with the blower.

:gah:Ouch! That won't help with the outside air infiltration. :)

I bought a couple of these wireless sensors to monitor temp and humidity around the house. Other folks might find them useful for measuring their HVAC performance.

http://www.sensorpush.com
...

Maybe that would be good enough. I've got records of the indoor and outdoor temp and humidity from a weather station. The humidity seems most needed when it gets down in the 30s and lower.

Thanks, beenthere. Good to know a shallow pump will work.

I was looking at the Aprilaire 400 because it seems to waste less water. The Aprilaire literature doesn't seem to recommend it for heat...

Thanks catmanacman. That's what I figured from doing some research--the air handler should be better able to handle the static pressure in the supply, no concern about the hydro coil blowing hot air...

Thank you beenthere!

I'm thinking I should install a humidifier. My solid cherry dining room table developed a crack last winter, and the air can feel dry in the winter sometimes. I think...

Horizontal doesn't look like a good option. There's a wall to the right of the furnace, and there's only about 60" of clearance horizontally. I'd need to knock down that wall and move it to the...

According to the Product Data document I have, the FV4C003 has a slant coil. The smaller and larger sizes are A coil. I'd like to keep my thermostat because it works well with the wood boiler, I...

I owned a ~1500 SF home, built in 1949 with concrete block walls (no insulation), no insulation under the floor, and very little insulation in the attic. A 2.5 ton AC did fine there.

Thanks. The furnace is 56" tall, the evap coil is 9.5" tall, and there's 5.5" of supply duct before the first branch.

The existing hydro coil is hacked in there, but it does work OK. The...

OK. Here is a picture of the current equipment.

The cravings are brutal. I didn't use the patch. I found myself coming up with reasons why I really didn't want to quit, and trying to talk myself out of quitting. It gets easier every day, but...

Nicotine is reportedly as addictive as heroin or cocaine. I dipped Copenhagen for years but eventually quit. Quitting was extremely difficult and took a lot of mental discipline and resolve. When...

Check out loadcalc.net for a free web calculator or hvaccomputer.com for pay HVAC-Calc software. I have used both. I found the software easier to use and it allows you to save your work and check...

The context here is I am looking at options to replace an existing system that includes an oil furnace, heat pump, and a hydronic coil in the return ductwork (for an outdoor wood boiler.) There is...

Thanks. I will do that.

Good question. I hadn't thought about the drain. It's a basement with a concrete slab floor, so a condensate pump would be required. There's an existing coil there now with a condensate pump, but...

Does anyone have experience installing a Carrier FV4CN003 air handler (with slope coil) using the side return option? The installation manual shows the side return as an option with this model, and...