Win 1 of 2 200-litre Novasun solar water heating systems, each worth R17 500*

Date:20 September 2013 Tags:,

The newly patented Novasun hybrid solar water heating system is stagnation proof, freeze proof, hail proof and easy to install, making it ideally suited to our local environmental conditions.

It took Etienne Holder and his long-time business partner Walter Hupertz two years to perfect their locally developed design. The duo took inspiration from EV tubes and standard flat panel designs to create a completely new hybrid system.

Inside its flat panel collector, the Novasun system features thin copper tubes, all of which have been laser-welded on to the collector sheet. Inside each of the hermetically sealed tubes is just 7 ml of fluid, described as a “special mix of herbs and spices” that eliminates any possibility of freezing. As the fluid heats up, it becomes a gas, rising to dissipate its heat into a heat exchanger and warm the water. The gas then condenses and falls to the bottom of the tubes and the cycle is repeated. Once the water inside the heat exchanger reaches a temperature of about 65 degrees, the gas can no longer condense and the cycle is halted, preventing stagnation.

The unit is enclosed by a sheet of low-iron boron glass, making the entire collector completely hail-proof. It’s connected to Holder’s proven Solartherm water cylinder, which employs a crosslinked polyethylene (PEX) lining to prevent any grime build-up from dirty water. The complete system is reportedly very easy to install.

The Novasun SWH system has been awarded the SABS mark of approval and is already on Eskom’s rebate system. Plus it comes with a 10-year unconditional guarantee.

For more information, contact Solar Assist on 0861 106 618 or visit

* Includes installation

To enter, answer the following question: How much of the “special mix of herbs and spices” is inside each of the hermetically sealed tubes?

SMS the word NOVASUN, followed by the answer, your name and e-mail address to 32697 (R1,50 per SMS; this service does not allow for 8ta numbers), or fill in the online form below. Competition closes on 31 October, and winners will be drawn on 8 November.

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Competition rules:
1. Entry is open to anyone except employees (and their immediate families) of Ramsay Media, the competition sponsor and associated agencies. 2. Only one online entry per person. You may enter via SMS as many times as you like (SMS charged at R1,50). 3. Competition runs until 31 October 2013. 4. We will draw the winner(s) on 8 November 2013. 5. The prize is not redeemable for cash. 6. Prizes not claimed within 3 months will be forfeited. 7. The judges’ decision is final and no correspondence will be entered into. 8. Regrettably, only South African residents are eligible for prizes. 9. By entering this competition, you agree to receive future correspondence from Popular Mechanics. You can opt out at any stage by: (a) Sending an e-mail containing the relevant details with the subject line “opt out” to; or (b) Sending an SMS including the word “STOP” to 31699. Standard SMS rates apply. 10. For the complete set of competition rules, click here

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