Hoffman DAH Heater Cross Reference to Hammond and Pfannenberg

Hoffman DAH heaters cross to Hammond FLHTF fan heaters at the same voltage and the next watt rating up or equal. Both have a built-in thermostat set from 0 to 100°F and a fan that pushes the heat up through the cabinet. Pfannenberg FLH-TF and FLH-T fan heaters with thermostat are the second option. The table lists every DAH catalog number.

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Hoffman DAH to Hammond and Pfannenberg

Hoffman DAH	Hoffman rating	Hammond FLHTF	Pfannenberg
DAH1001A	100 W, 115 V, 0.98 A	FLHTF125A115, 125 W, 120 V	FLH-TF 125 17012515407, 125 W, 115 V
DAH1002A	100 W, 230 V, 0.49 A	FLHTF125A230, 105/125 W, 220/240 V	FLH-T 250 17025310007, 250 W, 230 V (next size up)
DAH2001A	200 W, 115 V, 1.89 A	FLHTF200A115, 200 W, 120 V	FLH-TF 200 17020015407, 200 W, 115 V
DAH2002A	200 W, 230 V, 0.95 A	FLHTF200A230, 165/200 W, 220/240 V	FLH-T 250 17025310007, 250 W, 230 V
DAH4001B	400 W, 115 V, 3.72 A	FLHTF400A115, 400 W, 120 V	FLH-TF 400 17040015407 or FLH-T 400 17040315007, 400 W, 115 V
DAH4002B	400 W, 230 V, 1.86 A	FLHTF400A230, 335/400 W, 220/240 V	FLH-T 400 17040310007, 400 W, 230 V
DAH8001B	800 W, 115 V, 7.37 A	FLHTF800A115, 800 W, 120 V	FLH-TF 800 17080015407 or FLH-T 800 17080315007, 800 W, 115 V
DAH8002B	800 W, 230 V, 3.69 A	FLHTF800A230, 670/800 W, 220/240 V	FLH-T 800 17080310007, 800 W, 230 V
DAH13001C	1,300 W, 115 V, 11.5 A	FLHTF1300A115, 1,300 W, 120 V	FLH-T 1000 17099315007, 1,000 W, 115 V (300 W less)
DAH13002C	1,300 W, 230 V, 5.7 A	FLHTF1300A230, 1,080/1,300 W, 220/240 V	FLH-T 1000 17099310007, 1,000 W, 230 V (300 W less)

Sources: nVent Hoffman DAH electric heater spec sheet (rated voltage, watts, nominal amps). Hammond FLH series (FLHTF) data sheet. Pfannenberg USA FLH-TF data and Pfannenberg FLH-T 250 to 1000 product sheet. On the Hammond 230 V models the lower watt figure is at 220 V and the higher at 240 V. These are matches by published watts, voltage and features. Hoffman, Hammond and Pfannenberg have not published this cross.

Side by side

	Hoffman DAH	Hammond FLHTF	Pfannenberg FLH-TF	Pfannenberg FLH-T
Thermostat	Built in, 0 to 100°F (-18 to 38°C)	Built in, 0 to 100°F (-18 to +38°C)	Built in, -4 to +104°F (-20 to +40°C)	Built in, -20 to +40°C (-4 to +104°F)
Watts	100, 200, 400, 800, 1,300	125, 200, 400, 800, 1,300	125, 200, 400, 800	250, 400, 600, 800, 1,000
Voltage	115 or 230 V, 50/60 Hz	120 V 60 Hz or 220/240 V 50/60 Hz	115 V, 60 Hz	115 or 230 V, 50/60 Hz
Fan	Ball bearing fan	Fan Auto/On switch with heat-on pilot light. 20 CFM, 50 CFM on 1,300 W	Fan switch: run always or only while heating. 16 to 26 CFM	Ball bearing fan, 180 m³/h at 60 Hz
Housing	Brushed aluminum	Aluminum alloy	Aluminum	Plastic, UL 94 V-0
Size (H x W x D)	See Hoffman drawing	5.5 x 4.0 x 5.3 in (125, 200 W). 7.5 x 4.0 x 5.3 in (400, 800 W). 1,300 W: see Hammond drawing	5.5 x 4 x 5.375 in (125, 200 W). 7.5 x 4 x 5.375 in (400, 800 W)	See Pfannenberg drawing
Mounting	Four 10-32 self-tapping screws, included	See Hammond drawing	Direct surface mount	4 x M5 screws, not included
Listing	UL 508A Component Recognized, CSA	UL file E331157. 1,300 W models cURus only	UL Recognized	UL Recognized

Sources as above. Check the mounting hole pattern and clearance before you swap a heater in an existing panel.

How much heat do you need?

Hammond gives this formula: heater watts = (ΔT x k x A) minus the watts the parts in the box already give off. ΔT is how far above outside air you need the inside (1 K = 1°C = 1.8°F). A is the exposed surface area in ft². Double the ΔT x k x A term for an outdoor box.

Enclosure material	k (W/ft²K)
Painted steel	0.51
Stainless steel	0.344
Aluminum	1.115
Plastic	0.325

Step	Numbers	Result
Heat loss	ΔT 15 K x 0.51 (painted steel) x 30 ft²	229.5 W
Minus parts	Power supplies and relays left on: 50 W	179.5 W
Pick	Next size up at 115 V	FLHTF200A115 or FLH-TF 200 17020015407 (replaces DAH2001A)

k values and formula from Hammond heating products data. Example values only. Use your box size and site temperatures. For cooling loads use the heat load calculator.

Common questions

Is the Hammond FLHTF a straight swap for a DAH?

On ratings, yes from 200 W up: same voltage, same watts, same 0 to 100°F thermostat range. Check the hole pattern and clearance, since the bodies are not the same size. The 100 W DAH crosses to the 125 W FLHTF.

Why does the Hammond 230 V heater list two watt ratings?

Heater output changes with voltage. Hammond lists the 230 V models at 220 V and 240 V, so the FLHTF400A230 gives 335 W at 220 V and 400 W at 240 V. If your line runs at 208 V, size up.

What replaces the 1,300 W DAH?

Hammond FLHTF1300A115 or FLHTF1300A230 at the same 1,300 W. The largest Pfannenberg FLH-T is 1,000 W. Use two smaller units if you need the full 1,300 W from Pfannenberg.

Do I need a fan heater or a radiant heater?

A fan heater with a thermostat is one part and spreads heat fast through a big box. A radiant heater like the FLH 100 17010005007 snaps onto DIN rail, has no fan, and needs a separate thermostat or hygrostat. It fits small boxes where you only need to stop condensation.

Where should the heater go?

Low in the cabinet, on a metal panel, with the air outlet up. Hoffman says to keep heat sensitive parts out of the discharge area and never mount on wood. The same rule makes sense for any fan heater.

Get it crossed and quoted

Send the Hoffman catalog number from the label, the supply voltage and how many you need. We send back the Hammond or Pfannenberg part with lead time.

Request a Quote Book 30 Minutes to Review the Application Call 248-830-4850

Hoffman and nVent are trademarks of nVent Services GmbH or its affiliates. Applied Control Inc. is not affiliated with nVent. Hoffman data is from nVent published spec sheets and is shown only to identify the part being replaced. Check the current manufacturer datasheet before you specify.