The Gerda Collection
Gerda Thermo Prime 75
Gerda residential doors
Gerda Thermo Prime 75 Entrance Doors
Thermo Prime 75 has U-values of 0.79 W/m²K for a solid door and 0.9 W/m²K glazed, the lowest of the three ranges in the UK brochures. The 75 mm leaf has a thermal break (an insulating barrier that slows heat passing through the door) and sits in an Alutherm 75 aluminium frame.
Locking is a 5-point mortise lock or a 3-point automatic lock, and the range is rated RC2. It is offered in 63 designs across the Tempo, Quadro, Air Glass and Elite 3D series, and in selected colours and designs it can be made up to 2400 mm high. SteelR supplies and installs the range.
- Thermal performance (U-value)
- 0.79 W/m²K solid, 0.9 W/m²K glazed
- Burglary resistance
- RC2
- Door leaf
- 75 mm thick, with thermal break
- Frame
- Alutherm 75 aluminium, 77 mm
- Width
- 840 to 1130 mm
- Height
- 1950 to 2200 mm, or up to 2400 mm in selected colours and designs
Heights exclude the 27 mm sill and any extensions, and include the low threshold. Sizes are made in 10 mm increments; the available width and height depend on the design and colour. Doors over 2200 mm are available in a limited choice of colours and designs and are not tested for security or weather resistance.
How it is built
A 75 mm leaf with a thermal break and a choice of two locks
The Thermo Prime 75 specification, as set out in the UK range brochure. The doors are made at Gerda's plant in Starachowice, Poland.
- Leaf construction
- A metal faced leaf, 75 mm thick, on a timber inner frame with a polyurethane (PUR) foam core and a thermal break.
- Locking
- A 5-point mortise lock, or a 3-point automatic lock, with adjustable hook keeps that have a flexible insert.
- Cylinder and keys
- A class 6 lock cylinder on the two stage installer and owner key system.
- Hinges
- Adjustable in three planes, with caps that match the hardware colour, and three hinge guards on the hinge side.
- Leaf and frame
- A door leaf with a thermal break in an Alutherm 75 aluminium frame. The door is rebated on four sides, meaning leaf and frame overlap in a stepped edge. An adjustable keep, the plate the lock engages in the frame, sets how firmly the leaf closes against the seals.
- Threshold and weather seal
- A low aluminium threshold with a thermal break, a composite threshold connector and a bottom weather seal on the leaf.
- Ring plate
- A ring plate around the lock cylinder (a ring escutcheon) is available where the door is fitted with a handrail.
Door designs
63 designs in the Thermo Prime 75 range
Each design is shown as Gerda illustrates it. Colours and hardware in the pictures are examples: any design can be ordered in any colour its size allows.
Tempo
Width 840 to 1130 mm · Height 1950 to 2400 mm
Flat contemporary leaves with stainless or black insert strips, slim glazed panels and long bar handles. Milano and Hanover carry the design on both faces as standard.
Hanover 5 B
Ref NS5B
Hanover 6
Ref NS6
Innsbruck
Ref NS7
Milano 10
Ref NS3
Milano 11
Ref NS4
Milano 12
Ref NS9
Milano 12 B
Ref NS9B
Milano 8
Ref NS1
Milano 8 B
Ref NS1B
Milano 9
Ref NS2
Plain
Ref W00
Quadro
Width 840 to 1130 mm · Height 1950 to 2400 mm
Flush leaves divided by horizontal and vertical lines, many with square or full height glazing and contrasting colour blocks. The inside face is plain as standard. Kronach, Regen, Drezno and Erfurt can be ordered with the design on both faces as an option.
Bamberg 1
Ref KWF
Bamberg 2
Ref KWG
Bamberg 3
Ref KWH
Bamberg 4
Ref KWI
Dorfen
Ref KWS
Dorfen B
Ref KWSB
Drezno 4
Ref KPH
Erfurt 1
Ref KPA
Erfurt 1 B
Ref KPAB
Erfurt 2
Ref KPB
Erfurt 3
Ref KPC
Jena 3
Ref KWE
Jena 4
Ref KW4
Kassel 1
Ref KWT
Kassel 2 B
Ref KWXB
Kronach 1
Ref KPN
Kronach 2
Ref KPP
Kronach 2 B
Ref KPPB
Pasawa 1
Ref KWA
Pasawa 2
Ref KWB
Pasawa 3
Ref KWC
Pasawa 3 B
Ref KWCB
Pasawa 4
Ref KWD
Regen 1
Ref KPJ
Regen 2
Ref KPK
Regen 3
Ref KPL
Regen 4
Ref KPS
Regen 5
Ref KPM
Regen 6
Ref KPR
Regen 6 B
Ref KPRB
Trewir 1
Ref KWL
Trewir 2 B
Ref KWMB
Trewir 3
Ref KWN
Trewir 4
Ref KWP
Trewir 7
Ref KW7
Ulm 2
Ref KWK
Air Glass
Width 840 to 1130 mm (Villach 1030 to 1130 mm) · Height 2087 mm fixed (Villach 1950 to 2400 mm)
Designs built around a tall glass panel set into the leaf. Air Glass doors are made at a fixed height of 2087 mm without a sill. The two Villach designs are the exception: they are made in a range of heights and need a width of 1030 to 1130 mm.
Graz 1
Ref AGE
Graz 2
Ref AGF
Graz 3
Ref AGG
Graz 3 B
Ref AGGB
Linz 1
Ref AGB
Linz 2
Ref AGC
Linz 3
Ref AGD
Linz 3 B
Ref AGDB
Salzburg
Ref AGA
Villach
Ref AGH
Villach B
Ref AGHB
Elite 3D
Width 840 to 1130 mm · Height 1950 to 2400 mm (Hawkstone 1950 to 2200 mm)
Panelled doors with raised decorative mouldings. The mouldings are thick aluminium profiles fixed to the leaf and finished in the leaf colour. The series includes the Hawkstone, a traditional four panel door with two glazed lights. Classic or modern moulding frames. The inside face is plain as standard, with the design on both faces as an option. The Hawkstone has the design on both faces as standard.
Brig
Ref ELA
Hawkstone
Olten
Ref ELB
Trin
Ref ELD
Visp
Ref ELC
Gallery
Thermo Prime 75 in place
Finishes
Thermo Prime 75 colours
Thirteen standard colours and woodgrains. Six of them can be made up to 2400 mm high in this range.
| Colour | Ref | Max door height |
|---|---|---|
| White | FSB | 2400 mm |
| Steel Grey | FKZ | 2100 mm |
| Anthracite | FKG | 2400 mm |
| Dark Anthracite | FKF | 2400 mm |
| Black | FKC | 2100 mm |
| Alpine Walnut | FRR | 2100 mm |
| Mahogany | FMA | 2087 mm |
| Brazilian Walnut | FRB | 2100 mm |
| Light Walnut | FRP | 2400 mm |
| Golden Oak | FDE | 2400 mm |
| Winchester | FDW | 2400 mm |
| Turner Oak | FDT | 2087 mm |
| Light Wenge | FEJ | 2100 mm |
Also available: Black Matt, Silk Anthracite, Red, Pistachio, Light Blue, Light Green, Blue, Dark Green, Cobalt Blue, and the RAL colour range.
Options
Hardware, glass and access
Handle sets for Thermo Prime 75, followed by the options shared across the Gerda collection.
- Handle sets
- Bergen TW300, as handle both sides or knob outside and handle inside, or Sofia as handle both sides. An Amsterdam or Montreal handrail with a ring plate can replace the outside handle.
- Glass
- Clear, Matte, Reflex Graphite, Reflex Brown or Mira Star.
- Insert strips
- Black (RAL 9005) or brushed stainless steel.
- Hardware finishes
- Platinum, silver or black anodised. Brushed stainless steel is available on handrails.
- Handrails
- Amsterdam and Montreal pull bars in 1000, 1500, 1700 and 1800 mm lengths.
- Side lights and top lights
- Side lights 300 to 900 mm wide and 1950 to 2200 mm high. Top lights 840 to 2950 mm wide and 300 to 500 mm high. Both are made in 10 mm increments.
- Sills
- The sill sits under the frame on the outside. Four depths: 120, 150, 180 and 230 mm, with thermal compensation, finished in the door colour.
- Letterplates
- Platinum, silver or black anodised.
- Keys
- A two stage key system. Two installer keys operate the door during fitting. The first use of an owner key cancels them. Five owner keys arrive in a sealed bag with a code card.
- Smart lock
- A tedee smart lock with its bridge (a plug in unit that connects the lock to the internet) can be added, so the door can be locked, unlocked and checked from a phone. A keypad with PIN and fingerprint entry is also available.
Questions
Gerda Thermo Prime 75: common questions
What is the U-value of the Gerda Thermo Prime 75?
The range brochure gives a Ud of 0.79 W/m²K for a solid Thermo Prime 75 door and 0.9 W/m²K for a glazed one. These are the lowest figures of the three ranges in the UK brochures. Ud is the heat loss figure for the whole door, and a lower number means less heat lost.
How tall can a Gerda Thermo Prime 75 door be?
The standard height range is 1950 to 2200 mm. In selected colours and designs the door can be made up to 2400 mm. Gerda states that doors over 2200 mm are not tested for security or weather resistance, so the RC2 rating applies up to 2200 mm.
What locking does the Gerda Thermo Prime 75 use?
Thermo Prime 75 is fitted with either a 5-point mortise lock or a 3-point automatic lock, with a class 6 cylinder. The range is rated RC2. A tedee PRO smart lock with its bridge can be added as an option.
Should I choose Thermo Prime 75 or Thermo Premium 75?
Choose Thermo Prime 75 for the lower glazed U-value, an automatic lock option or a door taller than 2200 mm (doors over 2200 mm are not tested for security or weather resistance). Choose Thermo Premium 75 for the Gerda ZW 2000 multi lock set and the possibility of an RC3 rating, which depends on door size and design.
The rest of the collection
Other Gerda ranges
Gerda Optima 60
The 60 mm range, and the one with the widest choice of contemporary Tempo designs plus the traditional Classic panel doors.
Gerda Thermo Premium 75
A 75 mm leaf with a thermal break, the full Gerda ZW 2000 locking set and the largest choice of designs in the collection.
SteelR bespoke collection
Made to measure steel entrance doors to your opening, in any RAL colour and at higher security ratings.
Gerda residential doors · Supplied and installed by SteelR
Enquire about Gerda Thermo Prime 75
Tell us which range and design you have in mind and we will call you back to talk through sizes, colours and options. There is no obligation. Supply and installation are by SteelR.