EcoRenovator  

Go Back   EcoRenovator > Improvements > Conservation
Advanced Search
 


Blog 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 06-11-14, 02:51 PM   #1
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
Default Things to aid cooling / avoid heat gain

We have a pretty good list of things in our 60+ home energy saving tips. Is there anything else you guys can think of that we can add to the list?

Quote:
Cooling

Turn the A/C thermostat temperature up as high as is comfortable, sometimes using the A/C just to dehumidify the house may be enough to be comfortable.

Use blinds (good) or awnings (better) to block direct sunlight.

Use reflective window film to block direct sunlight but still let light in the house.

If possible, open the house up at night and use box fans in windows or a whole house fan to cool the house down instead of relying on the A/C.

Install radiant barrier insulation in your attic.

Place window A/C units on the north side of the house or any place where the sun does not shine on them.

Use fans to allow you to increase the A/C temperature and still stay comfortable.

Use solar screens to block more sun from entering through the window. This still provides light but reduces direct sun light and the heat it brings.

__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 06-11-14, 03:02 PM   #2
NiHaoMike
Supreme EcoRenovator
 
NiHaoMike's Avatar
 
Join Date: Oct 2008
Location: Austin, TX
Posts: 1,154
Thanks: 14
Thanked 257 Times in 241 Posts
Default

Paint the roof white, but that can be difficult to do.
__________________
To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
NiHaoMike is offline   Reply With Quote
The Following User Says Thank You to NiHaoMike For This Useful Post:
Daox (06-11-14)
Old 06-11-14, 11:25 PM   #3
Piwoslaw
Super Moderator
 
Piwoslaw's Avatar
 
Join Date: May 2009
Location: Warsaw, Poland
Posts: 960
Thanks: 188
Thanked 110 Times in 86 Posts
Default

A longterm investment, but how about planting trees?
__________________
Ecorenovation - the bottomless piggy bank that tries to tame the energy hog.
Piwoslaw is offline   Reply With Quote
The Following User Says Thank You to Piwoslaw For This Useful Post:
philb (07-09-14)
Old 06-12-14, 01:45 AM   #4
oil pan 4
Land owner
 
Join Date: Nov 2012
Location: NM
Posts: 1,026
Thanks: 12
Thanked 127 Times in 107 Posts
Default

You can buy large trees up to 9 years old to get a head start on shade trees.

when I started working mid shift I couldnt keep noise and sun light out of the bed room so I cut foil backed foam insulation. It really keeps the heat out.

When ever I put up or gut one side of an interior wall I insulate it. I like closing doors and closing off A/C to rooms not being used. That helps.
oil pan 4 is offline   Reply With Quote
Old 06-12-14, 05:58 AM   #5
doug30293
Too Many Projects
 
Join Date: Nov 2013
Location: georgia
Posts: 91
Thanks: 0
Thanked 6 Times in 6 Posts
Default

If your heat pump needs replacement, install one significantly smaller than what your HVAC installer recommends. It will be more efficient and last longer if it runs continuously during the hottest days and doesn't keep the house at a constant temperature.

Also, don't install the air handler, or any duct work, in the attic.

HVAC installers always oversize the equipment to avoid callbacks from customers who insist the house stay at 68F in the middle of August. Don't be that customer.
doug30293 is offline   Reply With Quote
The Following User Says Thank You to doug30293 For This Useful Post:
Servicetech (06-22-14)
Old 06-22-14, 10:17 AM   #6
Servicetech
Apprentice EcoRenovator
 
Servicetech's Avatar
 
Join Date: Nov 2013
Location: Moore Oklahoma
Posts: 267
Thanks: 108
Thanked 23 Times in 21 Posts
Default

Quote:
Originally Posted by doug30293 View Post
If your heat pump needs replacement, install one significantly smaller than what your HVAC installer recommends. It will be more efficient and last longer if it runs continuously during the hottest days and doesn't keep the house at a constant temperature.

Also, don't install the air handler, or any duct work, in the attic.

HVAC installers always oversize the equipment to avoid callbacks from customers who insist the house stay at 68F in the middle of August. Don't be that customer.
HVAC systems can sometimes be HALF the 500sqft per ton that HVAC contractors typically recommend, especially if kept out of the attic!! If you do install a smaller system it MUST work correctly, and you must get the rated capacity from it. Most systems typically run at about 2/3 rated capacity, which will keep the customer cool if the system is 50% larger than needed....

Window AC's aren't the only ones that benefit from running in the shade, central AC condensers run lower head pressures also. Locate central AC consender on East (will be shaded during afternoon heat) or North side of house if possible. West is the worst side to install AC unit.

Last edited by Servicetech; 06-22-14 at 10:20 AM..
Servicetech is offline   Reply With Quote
Old 07-07-14, 12:28 PM   #7
gasstingy
Journeyman EcoRenovator
 
Join Date: Feb 2010
Location: Arab, AL
Posts: 491
Thanks: 109
Thanked 49 Times in 43 Posts
Default Ducts in attic

My wife and I insisted on ducts in the attic when we built our home in Alabama. Even knowing the downside to this choice, as in: attic is hotter in summer causing valuable cooled air to be subject to hotter than necessary ductwork, and colder in winter causing colder than necessary ducts.

We chose to put them in the attic so we wouldn't need to dodge floor registers when arranging furniture and would not have floor level dirt going down into our ducts. To help offset this, we put a huge amount {compared to every other house we've seen in our area} of ventilation in our attic and 3 1/2" of opencell foam on the top of the ceiling sheetrock plus 15" of blown in cellulose over the foam.

All this said, the premise of ducts belong under the house is correct. The choice to put them in the attic will result in higher utility bills unless you go to great lengths to mitigate some of the problem you will have created for yourself.
gasstingy is offline   Reply With Quote
Old 07-07-14, 12:43 PM   #8
gasstingy
Journeyman EcoRenovator
 
Join Date: Feb 2010
Location: Arab, AL
Posts: 491
Thanks: 109
Thanked 49 Times in 43 Posts
Default

We contacted four HVAC companies to give us an estimate for replacing our old 3 or 3.5 ton central unit and told them up front that we did not have a "rule of thumb" house and described the improvements we'd made. I related I wanted to go with a smaller unit. None of the four HVAC contractors did a "Manual J" test on the house when they prepared a quote. One said we needed 4 tons, two others said the size we had was exactly what we needed. The forth guy just agreed with me that I needed a smaller unit and he'd put a 2.5 ton in for me. Each of the first three mentioned came back and used that "rule of thumb" when they gave me their quotes completely ignoring what I'd said.

That was why I had a home energy audit done on my house and why I felt good in downsizing to a 2 ton variable speed 19 SEER unit. The auditor was the only one that did not have a financial incentive to put in a bigger unit. Plus, I was afraid I'd intimidated the fourth guy into putting in the wrong size unit. Without the audit, we'd have installed a 2.5 ton unit. With the audit, at the audtors suggestion, we upped the cellulose in our attic from 5" to 15" so we could comfortably use the 2 ton unit.
gasstingy is offline   Reply With Quote
The Following 3 Users Say Thank You to gasstingy For This Useful Post:
Daox (07-07-14), Fornax (07-07-14), Piwoslaw (07-08-14)
Old 07-07-14, 08:11 PM   #9
ecomodded
Supreme EcoRenovator
 
Join Date: Sep 2012
Location: Vancouver Island,Canada.
Posts: 1,037
Thanks: 116
Thanked 100 Times in 87 Posts
Default

To help deal with the heat without using my air condition (I'm saving it for the really hot weather) I have a box fan placed in the
kitchen window facing in then I open the bathroom window , block the bottom half of it with white cardboard (looks better) so the warmer air is flowed out the top more directly.

Also I close my sunny front curtains and I leave those windows open 1 inch so the positive pressure blows the hot window air out. Actually I leave all the upstairs window open 1 inch, so the house is always venting , I think it makes a difference as well.

In the past I tried placing the box fan in the attic to vent the house, It worked *but* when the fan was off a strong back draft would blow fiberglass particles back into the house. It was nasty , I had to take it down within a few days of installing it or leave it on 24/7 to prevent the back draft.

85F today
ecomodded is offline   Reply With Quote
Old 07-22-14, 12:30 AM   #10
gtojohn
Journeyman EcoRenovator
 
gtojohn's Avatar
 
Join Date: Jul 2014
Location: Austin, TX
Posts: 314
Thanks: 39
Thanked 50 Times in 45 Posts
Default

I used aluminum kitchen foil for a radiant barrier. The payback for radiant barrier installed is pretty far out, but doing it your self with $30 in foil pays for itself quicker. I did this in the 850 sqft attic of the original part of my house. My friend sprayed lo-mit2 radiant barrier on it 10 yrs ago. The spray ons tend to to reflect only about 80%. During some down time I decided I wanted the air gap/channeling effect you can get with a foil barrier. Already having the spray on I was reluctant to spend a more on store bought barrier so I opted for Reynolds wrap. The trick is getting the heavy duty version and doubling the ends to support staples. I have to temp probes in my attic, one just above my insulation which now hovers about 1 degree above the outside high. The other probe is 2 feet higher, the height of my hvac. It tends to run 5-7 degrees warmer on really hot days. Highest I've seen it was 107f on a 100f day. I have a ridge vent, one gable vent and no soffit or eave vents. It works better than I expected. I feel a lot of it is from the channeling effect of keeping the heat in the rafters going up to the ridge vent.

gtojohn is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:08 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design