What type of coolant should you use for your solar system?

I just came across an interesting item describing the three most common types of coolant for solar hot water systems and some of their properties. The article seems to be written by the manufacturer so there may be a bit of bias, but it does highlight the issues inherent in coolant selection. It is short […]

City of Ottawa – Help for Folks Installing Solar Thermal

The City of Ottawa has a nice new web page that acknowledges the existence of solar energy, and in particular solar domestic hot water (SDHW).  The site, which can be found on ottawa.ca gives information about two different types of SDHW systems: a CSA approved factory packaged system and not factory packaged system.  Both types of installation […]

So, what solar equipment do I need to buy (part 1)?

 Solar system components

 When you start to think about a solar system, you have to remember that the industry is relatively new in Canada.  It has been used in Europe for decades, but its penetration on this side of the Atlantic has been marginal until recently.  That means that you have to be conscious that some of the product on the market may not have been certified for use in Canada.  The components that were installed in our house and that I will be speaking about below were all CSA approved and the “non-packaged” installation proposal that prepared was certified as compliant with the Ontario Building Code by a professional engineer.

The solar collectors we use in our house are the CAREarth Vacuum Tube Solar Collector SJ Series Heat Pipe Technology.  Continue reading “So, what solar equipment do I need to buy (part 1)?”

But, it’s always cloudy and cold here! What good is solar heat here?

It is a sad fact, but if you don’t get any sun, you don’t get any solar heat.  But even the grayest areas of the country get a significant amount of sun.  Thermomax, a is a Canadian company that uses European technology to provide solar hot water products.  Its web site has done a great job […]

How does solar thermal work?

In my earlier post I discussed how we decided to select solar hot water in our new house, but before we made the decision we had to understand something about the technology so that we could evaluate the options available to us.  In this post, I will be describing the components involved in solar thermal systems in very general terms and I will wrap it up with a discussion of the “gotcha” points we ran into when implementing our solution.

 

Continue reading “How does solar thermal work?”

Solar Hot Water – Not easy, but worth it!

Traditional Roof Mount
Traditional Roof Mounted Solar Hot Water Array

When we bought our new house about 4 years ago, we wanted to be able to take some control over the utility costs so that when energy prices rise, we would have a bit of protection. There are lots of technologies out there that are environmentally friendly, but not all of them are suited to use in a sub-division and many have a low rate of return on investment. Further complicating matters is the fact that many of the municipal inspectors have no idea what they are looking at when presented with some of the new technologies. So which one to choose… Continue reading “Solar Hot Water – Not easy, but worth it!”