Spa heating

Mackmot

Junior Member

Join Date: Nov 2018

Posts: 1
Share

Tweet
#1

Spa heating

11-06-2018, 12:47 AM

Hi new here was just want to run this idea by for opinions -
to heat a 1000 Ltd spa
2 50m coils of black 19 mm tube on the roof using a 12 v on demand pump with a smart tap timer to come on for 10 min off for 30 min thru the daytime I live in Australia with plenty of sun
Tags: None

How Much Do Solar Panels Cost? - How Can I Get A Quote From An Installer? - Register to Post
J.P.M.

Solar Fanatic

Join Date: Aug 2013

Posts: 14939
Share

Tweet
#2

11-06-2018, 01:12 AM

Once heated to temp., the duty of the solar heater and so to a pretty good degree its size and design will be determined by the overall loss coef. of the spa per degree of temp. diff. spa to surroundings, multiplied by that temp. diff. and not so much by the amount of water contained.

See Duffie & Beckman for particulars.
How Much Do Solar Panels Cost? - How Can I Get A Quote From An Installer? - Register to Post
Comment

Comment