Maureen Tiderman developed severe, chronic asthma after being exposed to formaldehyde fumes given off by the plywood paneling in a new mobile home she had purchased. A jury awarded Tiderman $566,500. The manufacturer and dealer contend the jury was improperly instructed. We agree and remand for a new trial.
In May 1977, Maureen Mogck (now Tiderman) and a girl friend purchased a Fleetwood mobile home from Olympic *874Auto and Trailer Sales (Olympic) in Port Angeles, Washington. Ms. Tiderman moved into the new home at the end of May. Shortly thereafter, she experienced a burning sensation in her eyes and throat. In July she collapsed, unable to breathe, while helping paint a house in Seattle. Her condition was diagnosed as asthma. She has had severe chronic asthma ever since and a related condition known as supra cord obstruction which on occasion renders her unable to breathe.
Ms. Tiderman sued Fleetwood Homes and Olympic (sellers). The case was tried to a jury on several product liability theories—implied warranty of merchantability and strict liability being the theories relevant to the issues on appeal. Several medical experts testified that formaldehyde fumes present in the mobile home caused Tiderman's illness. Other medical experts testified that Tiderman's asthma was genetic or that the concentration of formaldehyde was insufficient to cause any serious health problems.
We consider first the instructions concerning the implied warranty of merchantability. The jury was instructed as follows:
15. As to the claim of Breach of Implied Warranties, the plaintiff has the burden of proving each of the following propositions:
First, that the defendants Fleetwood Homes of Washington, Inc., and Olympic Auto & Trailer Sales, breached implied warranties that the mobile home was safe and fit for its intended use as a residence;
16. The builder or distributor of a mobile home impliedly warrants to the buyer that the mobile home is merchantable. This warranty of merchantability means that the mobile home is fit for the purchaser to live in.
(Italics ours.) Sellers took exception to the italicized language. They urged the trial court to substitute "fit for intended use as a residence." Sellers argue that the italicized language misled the jury in that it allowed the jury to focus on the fitness of the home for Tiderman rather than its fitness as a home for the average consumer.
*875As a general rule, instructions are sufficient if (1) they permit the parties to argue their theory of the case, (2) they are not misleading, and (3) when read as a whole they correctly state the applicable law. Braxton v. Rotec Indus., Inc., 30 Wn. App. 221, 633 P.2d 897 (1981). Sellers' theory of defense, inter alia, was that they had the duty to supply a mobile home which was fit for use by the ordinary consumer, not the duty to supply a residence safe for Tiderman in light of her peculiar sensitivity. Sellers contend that their position is amply supported by Esborg v. Bailey Drug Co., 61 Wn.2d 347, 358, 378 P.2d 298 (1963), wherein the court stated:
[I]t would appear reasonable to require of a plaintiff, seeking to establish a breach of such warranties, when confronted with the defense of allergy or hypersensitivity, that such plaintiff produce substantial evidence which, with the reasonable inferences therefrom, will support findings that: . . . (b) such ingredient is harmful to a reasonably foreseeable and appreciable class or number of potential users of the product; . . .
(Italics ours.)
We find merit in the sellers' position. Instruction 16 permitted the jury to hold sellers liable simply by finding that the mobile home was unfit for Tiderman (the purchaser) to live in. Tiderman argues that the sellers were not prejudiced because there was ample evidence from which the jury could have found that formaldehyde is harmful to a reasonably foreseeable and appreciable number of potential consumers. Unfortunately for Tiderman, there was also ample evidence to the contrary. Accordingly, the giving of instruction 16 was error.
We now turn to the instruction concerning the theory of strict liability. Although our resolution of the first issue disposes of this appeal, we will address sellers' contention that WPI 110.10, the basis for instruction 18, is misleading. We do so because any defect in that instruction is likely to affect subsequent proceedings as well.
Instruction 18 reads as follows:
*876As to the claim that each of the defendants sold a product that was not reasonably safe for its intended use, the plaintiff has the burden of proving each of the following propositions:
First, that the defendants supplied a product which was not reasonably safe at the time the product left the defendants' control or defendants failed to give an adequate warning necessary to make the use of the product reasonably safe; . . .
(Italics ours.) And, instruction 19 informed the jury that:
A seller and/or manufacturer has a duty to warn of any condition which renders a product not reasonably safe for a foreseeable use. There is, however, no duty to warn of obvious or known dangers.
Sellers first argue that an instruction such as 19 concerning the duty to warn was appropriate only if it was conceded that the mobile home would be unreasonably dangerous unless accompanied by a warning. We disagree. Whether a warning is necessary and/or adequate is a question for the jury. Little v. PPG Indus., Inc., 92 Wn.2d 118, 594 P.2d 911 (1979); Haysom v. Coleman Lantern Co., 89 Wn.2d 474, 573 P.2d 785, 93 A.L.R.3d 86 (1978). Further, a party is entitled to have his or her theory of the case presented to the jury if there is substantial evidence to support it. Egede-Nissen v. Crystal Mt., Inc., 93 Wn.2d 127, 606 P.2d 1214 (1980). Here there was evidence from which a reasonable jury could have concluded that the mobile home was unreasonably dangerous unless accompanied by a warning. Consequently, Tiderman was entitled to an instruction predicating liability on the sellers' failure to warn.1
*877Next, sellers direct our attention to the italicized language of instruction 18, which language they asked the trial court to delete. Sellers argue that the italicized language misled the jury to assume a warning was necessary, without first finding that the mobile home was unreasonably dangerous without one.
Sellers have identified a legitimate vice in the pattern instruction. An instruction is misleading if it can be read in either of two ways, one a correct statement and the other an incorrect statement of the law. 88 C.J.S. Trial § 338 (1955). Here, the jury could have concluded that the language "necessary to make the use of the product reasonably safe" either qualifies the duty to warn, or that it merely explains why the duty to warn is absolute. In other words, the jury could have read the italicized language thusly:
(1) The sellers are liable for failure to warn but only if a warning was "necessary to make use of the product reasonably safe"; or
(2) The sellers are liable if they failed to give an adequate warning, such warning being "necessary to make use of the product reasonably safe."
The first construction accurately reflects the law, the second does not because it presupposes a duty to warn. Where, as here, there was no contention or proof that any warning was given, the instruction as given comes dangerously close to directing a verdict.
We have considered the other instructions given and, in the circumstances, do not believe the giving of instruction 18 was reversible error. However, we suggest that, on retrial, if an instruction on duty to warn is deemed appropriate, one be formulated on the lines of that approved in Little v. PPG Indus., Inc., supra.
Reversed and remanded for a new trial.
Petrie, J., concurs.Instruction 19 contained only the first paragraph of WPI 110.02. We are not informed as to why the second paragraph was omitted. That paragraph reads as follows:
Where a warning is required, it must be adequate so that if followed, the product would be reasonably safe for use. The warning must be appropriate in view of the seriousness of any danger involved to reasonably advise of the consequences of improper use. Such a warning must be in a form which reasonably could be expected to catch the attention of, and to be understood by, the ordinary user.