Qrest Wiki
Everything for your hot tub, sauna and plunge tub
Maintenance, start-up, faults and warranty. Practical instructions from Qrest, written for owners.
Topics
Hot tubs
First start-up, firing, heating time, covers and winterising your Q-tub.
7 articlesJacuzzis
Controls, jets, pumps and cleaning the shell of your Q-cuzzi.
3 articlesOutdoor saunas
Siting, heating up, pouring water and caring for the wood of your sauna.
4 articlesCold plunge tubs
Building up cold plunging safely and keeping your ice tub water clean.
2 articlesWater care
Setting pH and chlorine, backwashing the filter, cloudy water and refills.
5 articlesHeaters & heating
Wood stove, sauna heater, heat pump and control unit error codes.
4 articlesDelivery & installation
Lead times, access route, base and preparing for installation day.
2 articlesWarranty & service
Warranty periods per product and how to request service or parts.
2 articlesMost-read articles
Cold plunging: building up safely in 4 weeks
The build-up schedule from 15 seconds to 3 minutes, the breathing technique against cold shock, the sauna contrast protocol and keeping water clean.
How long does it take to heat a hot tub?
Wood-fired takes around 2.5 to 3.5 hours, electric 5 to 16 hours depending on output. Calculate your own heating time and heat up faster with this plan.
Installing an outdoor sauna: foundation, connections and permits
Foundation, connections, permit check and crane access: the complete step-by-step plan to prepare your garden for an outdoor sauna, with a checklist.
Preparing for delivery and placement: base, access route, crane and connections
Base and weight, access and crane requirements, connections, the installation service and the checklist for delivery day for your hot tub or sauna.
Recently updated
Backwashing the sand filter: step by step, how often and what the valve positions mean
How a sand filter works, what each valve position does, the backwash and rinse procedure, how often to flush and when the filter sand needs replacing.
Changing the water: how often, when sooner and how to do it
Guideline of every 2 to 3 months, signs to change sooner, the full water-change protocol including shell cleaning and disposing of bath water in the garden.
Delivery time of a hot tub, jacuzzi or sauna: planning from order to delivery day
Indicative delivery times per product, why custom-made items take longer, how the planning runs up to the delivery appointment, and what to arrange.
Error codes on the display: ER-03 and other control unit messages
What ER-03 (temperature sensor) means and how to fix it safely, plus ER-01, ER-02 and ER-05, a safe reset procedure and when to call service.