TECHNOTHERM Frost Guard

Series FW 501 frost guard for basements/conservatories

The TECHNOTHERM FW 501 frost guard is a small electric convection heater for frost protection and light temperature control. A heating element warms the air inside the unit; it rises out at the top as warm air, while cooler air flows in from below. The integrated room thermostat measures the temperature and automatically switches the heater on and off between about 5 and 16 °C. This keeps the room frost-free without constantly heating. Overheat protection switches the unit off if the temperature is too high and back on again after it cools down.

High-quality technology – developed and manufactured in-house by TECHNOTHERM in Germany.
Safe and EU-compliant: Our systems meet all European safety and environmental requirements.

Tap icon/logo for more information

Reliably protects small rooms from frost

Ideal for basements, guest WC, storage rooms, conservatory, or overwintering plants up to approx. 15 m³.
Hier steht ein Alternativtext zum Bild
Hier steht ein Alternativtext zum Bild

Simply plug in and let it run

Plug into the socket, set the desired temperature on the rotary thermostat, and the frost guard regulates automatically. No maintenance, no chimney, no pipe system.

Safe and compact

Overheat protection, drip-water protection IP21, and metal housing, plus a handy format and only about 1 kg in weight. Fits discreetly on the wall.
Hier steht ein Alternativtext zum Bild

Effective frost protection

Reliably keeps rooms up to approx. 15 m³ frost-free and ensures stable basic temperature control.

Convection heat

The air-guided heating element generates gentle, rising warm air—ideal for small utility rooms, basements, or storage rooms.

Integrated thermostat

Automatic control in the range of approx. 5–16 °C—prevents unnecessary energy consumption and protects against frost damage.

High safety

With integrated overheat protection and automatic restart for safe continuous operation.

Robust construction

500 W output in a durable metal/stainless-steel housing—ideal for demanding environments.

Drip-water protection IP21

Suitable for damp rooms such as basements or unheated utility rooms.

Compact & flexible to install

Space-saving design, suitable for wall mounting and includes a safety plug—ready for immediate use.

Technical Data

ModelPerformanceDimensions (W x H x D)weight [approx.]Order numberInquire
Frost Guard 5000.5 kW240 x 240 x 105 mm1 kg427000501Inquire now

More Products

Targeted Seating Heat
Discreet Installation
Electronic Temperature Controller (KRT)

TECHNOTHERM Church Pew Heating KBH

The TECHNOTHERM KBH church pew heating consists of electric radiant heating panels that are permanently mounte…

Go to Product
Rapid Direct Heat
Efficient warm-air circulation
Slim housing in RAL 9010

TECHNOTHERM Combination Heater CVS E RT

The CVS E RT combination heater from TECHNOTHERM is a direct-heating freestanding convector with a powerful al…

Go to Product
Rapid Direct Heat
Ceramic storage for delayed heat release
Continuous warm air circulation

TECHNOTHERM Combination Heater CPH E RT

The CPH E RT combination heater from TECHNOTHERM is a direct heating floor convector with aluminum heating ele…

Go to Product
Fast heat-up
Long-lasting heat through ceramic storage
Radiant and Convection Heat Combined

TECHNOTHERM Combination Heater CHM RF

The TECHNOTHERM CHM RF combination heater combines direct heating and partial storage heating in one unit. An …

Go to Product

Electric Heating, simply better

installed. planned. invested.

Downloads

All information, such as installation and operating instructions as well as data sheets, can be found in our download area.

Enter a heading here

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Inquire about Product

    ModellLeistungAbmessung B x H x TGewicht [ca.]Bestellnummer
    Frost Guard 5000.5 kW240 x 240 x 105 mm1 kg427000501
    General Information

    Visit us

    Branch locator

    Find your nearest branch

    Write us

    Contact form

    We look forward to your message

    Call us

    +49 (0) 3724 66869 0

    Mon. – Fri.: 08:00 a.m. – 20:00 p.m.
    Sat.: 08:00 a.m. – 17:00 p.m.

    Federal holidays and Sundays excluded

    Get advice

    Arrange an appointment

    Arrange a personal appointment

    Filialsuche

    Finden Sie die nächstgelgende Filiale

    Kontaktfomular

    Wir freuen uns auf Ihre Nachricht

    Dies ist die Überschrift

    Mo. - Fr.: 08:00 - 20:00 Uhr
    Sa.: 08:00 - 17:00 Uhr

    bundeseinheitliche Feiertage und Sonntag ausgeschlossen

    Terminvereinbarung

    Persönlichen Termin vereinbaren